@article{59906,
  abstract     = {{The cationic molybdenum alkylidyne N-heterocyclic carbene (NHC) complex [Mo(C-p-OMeC6H4)(OCMe(CF3)2)2 (IMes)][B(ArF4] (IMes = 1,3-dimesitylimidazol-2-ylidene) was selectively immobilized inside the pores of ordered mesoporous silica (OMS) with pore diameters of 66, 56, and 28 Å and used in the ring-expansion metathesis polymerization (REMP) of cyclic olefins to yield cyclic polymers. A strong confinement effect was observed for cis-cyclooctene (cCOE), 1,5-cyclooctadiene (COD), (+)-2,3-endo,exo-dicarbomethoxynorborn-5-ene ((+)-DCMNBE), and 2-methyl-2-phenylcycloprop-1-ene (MPCP), allowing for the synthesis of low-molecular-weight cyclic polymers even at a high monomer concentration. The exclusive formation of cyclic polymers was demonstrated by matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry. Confinement also influences stereoselectivity, resulting in a pronounced increase in Z-selectivity and in an increased cis-syndiospecificity.}},
  author       = {{Probst, Patrick and Lindemann, Moritz and Bruckner, Johanna R. and Atwi, Boshra and Wang, Dongren and Fischer, Felix Richard and Högler, Marc and Bauer, Matthias and Hansen, Niels and Dyballa, Michael and Buchmeiser, Michael R.}},
  issn         = {{0002-7863}},
  journal      = {{Journal of the American Chemical Society}},
  number       = {{10}},
  pages        = {{8741--8750}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Ring-Expansion Metathesis Polymerization under Confinement}}},
  doi          = {{10.1021/jacs.4c18171}},
  volume       = {{147}},
  year         = {{2025}},
}

@article{60815,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>The increasing demand for advanced sensing technologies drives the development of chemical sensors using innovative materials. In gas sensing, optical sensors are often used to detect gases such as CO, NO<jats:italic><jats:sub>x</jats:sub></jats:italic>, and O<jats:sub>2</jats:sub>. Oxygen sensors typically incorporate dyes into oxygen‐permeable matrices like polymers, silica, or zeolites. Alternatively, semiconductor surface chemistry can enable O<jats:sub>2</jats:sub> detection. However, these approaches are often limited by slow response and recovery times and low selectivity, restricting their practical applications. The metal‐organic framework MOF‐76(Eu) and its yttrium‐modified variant, MOF‐76(Eu/Y) are reported to exhibit highly reversible and fast optical responses to varying O<jats:sub>2</jats:sub> concentrations. Time‐resolved emission measurements are performed over short (seconds) and long (hours) timescales using N<jats:sub>2</jats:sub> and synthetic air mixtures. Cross‐sensitivity to humidity is analyzed. Multichannel scaling photon‐counting experiments confirm quenching at the linker level, as the emission lifetime remains nearly constant. Yttrium significantly improves stability and performance at room temperature. Structural and optical changes induced by yttrium are investigated. Additionally, MIL‐78(Eu), another Eu‐BTC‐based MOF with a different coordination environment, is synthesized. Unlike MOF‐76(Eu), MIL‐78(Eu) exhibits distinct optical properties but lacks a reversible response to O<jats:sub>2</jats:sub>. These results highlight the potential of MOF‐76‐based materials for high‐performance O<jats:sub>2</jats:sub> sensing.</jats:p>}},
  author       = {{Zhao, Zhenyu and Weinberger, Christian and Steube, Jakob and Bauer, Matthias and Brehm, Martin and Tiemann, Michael}},
  issn         = {{1616-301X}},
  journal      = {{Advanced Functional Materials}},
  publisher    = {{Wiley}},
  title        = {{{Fast‐Responding O<sub>2</sub> Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)}}},
  doi          = {{10.1002/adfm.202511190}},
  year         = {{2025}},
}

@article{60600,
  abstract     = {{In the search for noble metal free photocatalytic systems, iron is the dream candidate. To increase excited state lifetimes of iron complexes, the multichromophoric approach is promising, combining organic chromophores with photoactive iron complexes, potentially enabling a reservoir effect. We present a series of chromophore-functionalized complexes based on the parental FeIII complex [Fe(ImP)2][PF6] (HImP = 1,1′-(1,3-phenylene)bis(3-methyl-1-imidazole-2-ylidene)). The four organic chromophores benzene, naphthalene, anthracene, and pyrene are attached to the ImP-ligand in para-position to the coordination site to systematically investigate the influence of the steric demand and electronic properties of the chromophore on charge transfer lifetimes as well as photodynamics. A thorough ground state characterization was conducted in addition to investigations of the excited state dynamics by transient absorption spectroscopy and streak camera emission measurements. The conclusions drawn are supported by extensive DFT calculations. The emission coefficients could be significantly improved by the addition of chromophores. After excitation of the complexes with larger chromophores, coplanarization of the backbone and complex motif occurs to stabilize the formal charge. This results in population of a superligand state that exhibits a much faster radiationless relaxation to the ground state compared to the parent complex, hindering a reservoir effect.}},
  author       = {{Schmitz, Lennart and Argüello Cordero, Miguel A. and Al-Marri, Mohammed J. and Schoch, Roland and Egold, Hans and Neuba, Adam and Steube, Jakob and Bracht, Bastian Johannes and Bokareva, Olga S. and Lochbrunner, Stefan and Bauer, Matthias}},
  issn         = {{0020-1669}},
  journal      = {{Inorganic Chemistry}},
  keywords     = {{Photo}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Chromophore Induced Effects in Iron(III) Complexes}}},
  doi          = {{10.1021/acs.inorgchem.5c00526}},
  year         = {{2025}},
}

@article{58180,
  abstract     = {{A series of CoIII complexes [Co(RImP)2][PF6], with HMeImP = 1,1′-(1,3-phenylene)bis(3-methyl-1-imidazole-2-ylidene)) and R = Me, Et, iPr, nBu, is presented in this work. The influence of the strong donor ligand on the ground and excited-state photophysical properties was investigated in the context of different alkyl substituents at the imidazole nitrogen. X-ray diffraction revealed no significant alterations of the structures and all differences in the series emerge from the electronic structures. These were probed via cyclic voltammetry and UV–vis spectroscopy, detailing the influence of the different alkyl substituents on the ground-state properties. All complexes are emissive at 77 K from a 3MC state, which exhibits lifetimes in the range of 1–5 ns at room temperature, depending on the alkyl substituent. Therefore, it is clearly shown that even small differences in the electronic structure have a large impact on the details of the excited state landscape. The observed behavior was rationalized by a detailed DFT analysis, which shows that the minimum-energy crossing point to the ground-state is located only slightly above the MC energy: Consequently, nonradiative decay to the ground state at room temperature is enabled, while at 77 K this path is prohibited, leading to low-temperature 3MC emission.}},
  author       = {{Krishna, Athul and Fritsch, Lorena and Steube, Jakob and Argüello Cordero, Miguel A. and Schoch, Roland and Neuba, Adam and Lochbrunner, Stefan and Bauer, Matthias}},
  issn         = {{0020-1669}},
  journal      = {{Inorganic Chemistry}},
  keywords     = {{Photo}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Low Temperature Emissive Cyclometalated Cobalt(III) Complexes}}},
  doi          = {{10.1021/acs.inorgchem.4c04479}},
  year         = {{2025}},
}

@article{62816,
  abstract     = {{The increasing demand for advanced sensing technologies drives the development of chemical sensors using innovative materials. In gas sensing, optical sensors are often used to detect gases such as CO, NOx, and O2. Oxygen sensors typically incorporate dyes into oxygen-permeable matrices like polymers, silica, or zeolites. Alternatively, semiconductor surface chemistry can enable O2 detection. However, these approaches are often limited by slow response and recovery times and low selectivity, restricting their practical applications. The metal-organic framework MOF-76(Eu) and its yttrium-modified variant, MOF-76(Eu/Y) are reported to exhibit highly reversible and fast optical responses to varying O2 concentrations. Time-resolved emission measurements are performed over short (seconds) and long (hours) timescales using N2 and synthetic air mixtures. Cross-sensitivity to humidity is analyzed. Multichannel scaling photon-counting experiments confirm quenching at the linker level, as the emission lifetime remains nearly constant. Yttrium significantly improves stability and performance at room temperature. Structural and optical changes induced by yttrium are investigated. Additionally, MIL-78(Eu), another Eu-BTC-based MOF with a different coordination environment, is synthesized. Unlike MOF-76(Eu), MIL-78(Eu) exhibits distinct optical properties but lacks a reversible response to O2. These results highlight the potential of MOF-76-based materials for high-performance O2 sensing.}},
  author       = {{Zhao, Zhenyu and Weinberger, Christian and Steube, Jakob and Bauer, Matthias and Brehm, Martin and Tiemann, Michael}},
  issn         = {{1616-301X}},
  journal      = {{Advanced Functional Materials}},
  publisher    = {{Wiley}},
  title        = {{{Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)}}},
  doi          = {{10.1002/adfm.202511190}},
  year         = {{2025}},
}

@article{56075,
  abstract     = {{An isostructural series of FeII, FeIII, and Fe(IV)complexes [Fe(ImP)2]0/+/2+ utilizing the ImP 1,1′-(1,3-phenylene)-bis(3-methyl-1-imidazol-2-ylidene) ligand, combining N-heterocy-clic carbenes and cyclometalating functions, is presented. The strong donor motif stabilizes the high-valent Fe(IV) oxidation state yet keeps the FeII oxidation state accessible from the parent Fe(III)compound. Chemical oxidation of [Fe(ImP)2]+ yields stable [FeIV(ImP)2]2+. In contrast, [FeII(ImP)2]0, obtained by reduction,is highly sensitive toward oxygen. Exhaustive ground state characterization by single-crystal X-ray diffraction, 1H NMR,Mössbauer spectroscopy, temperature-dependent magnetic measurements, a combination of X-ray absorption near edge structureand valence-to-core, as well as core-to-core X-ray emission spectroscopy, complemented by detailed density functional theory (DFT) analysis, reveals that the three complexes[Fe(ImP)2]0/+/2+ can be unequivocally attributed to low-spin d6, d5, and d4 complexes. The excited state landscape of the Fe(II) and Fe(IV) complexes is characterized by short-lived 3MLCT and 3LMCT states, with lifetimes of 5.1 and 1.4 ps, respectively. In the FeII-compound, an energetically low-lying MC state leads to fast deactivation of the MLCT state. The distorted square-pyramidal state, where one carbene is dissociated, can not only relax into the ground state, but also into a singlet dissociated state. Its formation was investigated with time-dependent optical spectroscopy, while insights into its structure were gained by NMR spectroscopy.}},
  author       = {{Steube, Jakob and Fritsch, Lorena and Kruse, Ayla and Bokareva, Olga S. and Demeshko, Serhiy and Elgabarty, Hossam and Schoch, Roland and Alaraby, Mohammad and Egold, Hans and Bracht, Bastian Johannes and Schmitz, Lennart and Hohloch, Stephan and Kühne, Thomas D. and Meyer, Franc and Kühn, Oliver and Lochbrunner, Stefan and Bauer, Matthias}},
  issn         = {{0020-1669}},
  journal      = {{Inorganic Chemistry}},
  keywords     = {{Photo}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Isostructural Series of a Cyclometalated Iron Complex in Three Oxidation States}}},
  doi          = {{10.1021/acs.inorgchem.4c02576}},
  year         = {{2024}},
}

@article{56074,
  abstract     = {{Effective photoinduced charge transfer makes molecular bimetallic assemblies attractive for applications as active light‐induced proton reduction systems. Developing competitive base metal dyads is mandatory for a more sustainable future. However, the electron transfer mechanisms from the photosensitizer to the proton reduction catalyst in base metal dyads remain so far unexplored. A Fe─Co dyad that exhibits photocatalytic H2 production activity is studied using femtosecond X‐ray emission spectroscopy, complemented by ultrafast optical spectroscopy and theoretical time‐dependent DFT calculations, to understand the electronic and structural dynamics after photoexcitation and during the subsequent charge transfer process from the Fe(II) photosensitizer to the cobaloxime catalyst. This novel approach enables the simultaneous measurement of the transient X‐ray emission at the iron and cobalt K‐edges in a two‐color experiment. With this methodology, the excited state dynamics are correlated to the electron transfer processes, and evidence of the Fe→Co electron transfer as an initial step of proton reduction activity is unraveled.}},
  author       = {{Nowakowski, Michał and Huber‐Gedert, Marina and Elgabarty, Hossam and Kalinko, Aleksandr and Kubicki, Jacek and Kertmen, Ahmet and Lindner, Natalia and Khakhulin, Dmitry and Lima, Frederico A. and Choi, Tae‐Kyu and Biednov, Mykola and Schmitz, Lennart and Piergies, Natalia and Zalden, Peter and Kubicek, Katerina and Rodriguez‐Fernandez, Angel and Salem, Mohammad Alaraby and Canton, Sophie E. and Bressler, Christian and Kühne, Thomas D. and Gawelda, Wojciech and Bauer, Matthias}},
  issn         = {{2198-3844}},
  journal      = {{Advanced Science}},
  keywords     = {{Photo, Xray}},
  publisher    = {{Wiley}},
  title        = {{{Ultrafast Two‐Color X‐Ray Emission Spectroscopy Reveals Excited State Landscape in a Base Metal Dyad}}},
  doi          = {{10.1002/advs.202404348}},
  year         = {{2024}},
}

@article{52346,
  abstract     = {{Promising cathode materials for fluoride-ion batteries (FIBs) are 3d transition metal containing oxides with Ruddlesden-Popper-type structure. So far, multi-elemental compositions were not investigated, but could alternate electrochemical performance similar to what has been found for cathode materials for lithium-ion batteries. Within this study, we investigate RP type La2Ni0.75Co0.25O4.08 as an intercalation-based active cathode material for all-solid-state FIBs. We determine the structural changes of La2Ni0.75Co0.25O4.08 during fluoride intercalation / de-intercalation by ex-situ X-ray diffraction, which showed that F- insertion leads to transformation of the parent phase to three different phases. Changes in Ni and Co oxidation states and coordination environment were examined by X-ray absorption spectroscopy and magnetic measurements in order to understand the complex reaction behaviour of the phases in detail, showing that the two transition metals behave differently in the charging and discharging process. Under optimized operating conditions, a cycle life of 120 cycles at a critical cut-off capacity of 40 mAh g-1 against Pb/PbF2 was obtained, which is one of the highest observed for intercalation electrode materials in FIBs so far. The average Coulombic efficiencies ranged from 85% to 90%. Thus, La2Ni0.75Co0.25O4.08 could be a promising candidate for cycling-stable high-energy cathode materials for all-solid-state FIBs}},
  author       = {{Vanita, Vanita and Waidha, Aamir Iqbal and Vasala, Sami and Puphal, Pascal and Schoch, Roland and Glatzel, Pieter and Bauer, Matthias and Clemens, Oliver}},
  issn         = {{2050-7488}},
  journal      = {{Journal of Materials Chemistry A}},
  keywords     = {{Xray}},
  number       = {{12}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Insights into the First Multi-Transition-Metal Containing Ruddlesden Popper-Type Cathode for all-solid-state Fluoride Ion Batteries}}},
  doi          = {{10.1039/d4ta00704b}},
  year         = {{2024}},
}

@article{60216,
  abstract     = {{Hydride donors such as DIBAL or CuH react with ZnO and ZrO2 via hydrogen spillover. This suggests that hydrogen spillover in catalysts based on these metal oxides may take place via initial hydride transfer and not via proton–electron transfer.}},
  author       = {{Benz, Michael and Bunjaku, Osman and Nowakowski, Michał and Allgaier, Alexander and Biswas, Indro and van Slageren, Joris and Bauer, Matthias and Estes, Deven P.}},
  issn         = {{2044-4753}},
  journal      = {{Catalysis Science & Technology}},
  keywords     = {{Xray}},
  number       = {{20}},
  pages        = {{5854--5863}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Hydrogen spillover through hydride transfer: the reaction of ZnO and ZrO2 with strong hydride donors}}},
  doi          = {{10.1039/d4cy00504j}},
  volume       = {{14}},
  year         = {{2024}},
}

@article{54024,
  abstract     = {{Transition metal complexes, particularly copper hydrides, play an important role in various catalytic processes and molecular inorganic chemistry. This study employs synchrotron hard X‐ray spectroscopy to gain insights into the geometric and electronic properties of copper hydrides as potential catalysts for CO2 hydrogenation. The potential of high energy resolution X‐ray absorption near‐edge structure (HERFD‐XANES) and valence‐to‐core X‐ray emission (VtC‐XES) is demonstrated with measurement on Stryker's reagent (Cu6H6) and [Cu3(μ3‐H)(dpmppe)2](PF6)2 (Cu3H), alongside a non‐hydride copper compound (Cu‐I). The XANES analysis reveals that coordination geometries strongly influence the spectra, providing only indirect details about hydride coordination. The VtC‐XES analysis exhibits a distinct signal around 8975 eV, offering a diagnostic tool to identify hydride ligands. Theoretical calculations support and extend these findings by comparing hydride‐containing complexes with their hydride‐free counterparts.}},
  author       = {{Fritsch, Lorena and Rehsies, Pia and Barakat, Wael and Estes, Deven P. and Bauer, Matthias}},
  issn         = {{0947-6539}},
  journal      = {{Chemistry – A European Journal}},
  keywords     = {{Xray}},
  number       = {{36}},
  publisher    = {{Wiley}},
  title        = {{{Detection and Characterization of Hydride Ligands in Copper Complexes by Hard X‐ray Spectroscopy}}},
  doi          = {{10.1002/chem.202400357}},
  volume       = {{30}},
  year         = {{2024}},
}

@article{54969,
  abstract     = {{This work presents a new and facile route for the preparation of iron oxide-based catalysts supported on alumina, which enables the targeted synthesis of catalysts with an increased amount of isolated tetrahedrally coordinated iron centers compared to a conventional impregnation procedure, and therefore leads to an increase in activity for CO oxidation reaction. By a multi-step impregnation–calcination protocol, the catalysts were synthesized with iron loadings of between 1 and 10 wt%, and their catalytic activity was then compared with a 10 wt% loaded catalyst prepared by conventional single impregnation. With a loading of 8 wt%, the presented catalysts showed an improved catalytic activity regarding light-off and full conversion temperatures compared to this reference. Through the application of several analytical methods (PXRD, PDF, DRUVS, SEM, XAFS), the improved catalytic activity can be correlated with an increased amount of isolated iron centers and a significantly reduced fraction of agglomerates or particles.}},
  author       = {{Schlicher, Steffen and Schoch, Roland and Prinz, Nils and Zobel, Mirijam and Bauer, Matthias}},
  issn         = {{2073-4344}},
  journal      = {{Catalysts}},
  keywords     = {{Catalysis}},
  number       = {{7}},
  publisher    = {{MDPI AG}},
  title        = {{{New and Facile Preparation Method for Highly Active Iron Oxide Catalysts for CO Oxidation}}},
  doi          = {{10.3390/catal14070416}},
  volume       = {{14}},
  year         = {{2024}},
}

@article{46547,
  author       = {{Rogolino, Andrea and Filho, José B. G. and Fritsch, Lorena and Ardisson, José D. and da Silva, Marcos A. R. and Atta Diab, Gabriel Ali and Silva, Ingrid Fernandes and Moraes, Carlos André Ferreira and Forim, Moacir Rossi and Bauer, Matthias and Kühne, Thomas D. and Antonietti, Markus and Teixeira, Ivo F.}},
  issn         = {{2155-5435}},
  journal      = {{ACS Catalysis}},
  keywords     = {{Catalysis, General Chemistry, pc2-ressources, Computing Resources Provided by the Paderborn Center for Parallel Computing}},
  number       = {{13}},
  pages        = {{8662--8669}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Direct Synthesis of Acetone by Aerobic Propane Oxidation Promoted by Photoactive Iron(III) Chloride under Mild Conditions}}},
  doi          = {{10.1021/acscatal.3c02092}},
  volume       = {{13}},
  year         = {{2023}},
}

@article{52345,
  abstract     = {{Photoactive chromium(III) complexes saw a conceptual breakthrough with the discovery of the prototypical molecular ruby mer-[Cr(ddpd)2]3+ (ddpd = N,N′-dimethyl-N,N′-dipyridin-2-ylpyridine-2,6-diamine), which shows intense long-lived near-infrared (NIR) phosphorescence from metal-centered spin-flip states. In contrast to the numerous studies on chromium(III) photophysics, only 10 luminescent molybdenum(III) complexes have been reported so far. Here, we present the synthesis and characterization of mer-MoX3(ddpd) (1, X = Cl; 2, X = Br) and cisfac-[Mo(ddpd)2]3+ (cisfac-[3]3+), an isomeric heavy homologue of the prototypical molecular ruby. For cisfac-[3]3+, we found strong zero-field splitting using magnetic susceptibility measurements and electron paramagnetic resonance spectroscopy. Electronic spectra covering the spin-forbidden transitions show that the spin-flip states in mer-1, mer-2, and cisfac-[3]3+ are much lower in energy than those in comparable chromium(III) compounds. While all three complexes show weak spin-flip phosphorescence in NIR-II, the emission of cisfac-[3]3+ peaking at 1550 nm is particularly low in energy. Femtosecond transient absorption spectroscopy reveals a short excited-state lifetime of 1.4 ns, 6 orders of magnitude shorter than that of mer-[Cr(ddpd)2]3+. Using density functional theory and ab initio multireference calculations, we break down the reasons for this disparity and derive principles for the design of future stable photoactive molybdenum(III) complexes.}},
  author       = {{Kitzmann, Winald R. and Hunger, David and Reponen, Antti-Pekka M. and Förster, Christoph and Schoch, Roland and Bauer, Matthias and Feldmann, Sascha and van Slageren, Joris and Heinze, Katja}},
  issn         = {{0020-1669}},
  journal      = {{Inorganic Chemistry}},
  keywords     = {{Inorganic Chemistry, Physical and Theoretical Chemistry}},
  number       = {{39}},
  pages        = {{15797--15808}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Electronic Structure and Excited-State Dynamics of the NIR-II Emissive Molybdenum(III) Analogue to the Molecular Ruby}}},
  doi          = {{10.1021/acs.inorgchem.3c02186}},
  volume       = {{62}},
  year         = {{2023}},
}

@article{52344,
  abstract     = {{Macrocyclization reactions are still challenging due to competing oligomerization, which requires the use of small substrate concentrations. Here, the cationic tungsten imido and tungsten oxo alkylidene N-heterocyclic carbene complexes [[W(N-2,6-Cl2-C6H3)(CHCMe2Ph(OC6F5)(pivalonitrile)(IMes)+ B(ArF)4−] (W1) and [W(O)(CHCMe2Ph(OCMe(CF3)2)(IMes)(CH3CN)+ B(ArF)4−] (W2) (IMes=1,3-dimesitylimidazol-2-ylidene; B(ArF)4−=tetrakis(3,5-bis(trifluoromethyl)phenyl borate) have been immobilized inside the pores of ordered mesoporous silica (OMS) with pore diameters of 3.3 and 6.8 nm, respectively, using a pore-selective immobilization protocol. X-ray absorption spectroscopy of W1@OMS showed that even though the catalyst structure is contracted due to confinement by the mesopores, both the oxidation state and structure of the catalyst stayed intact upon immobilization. Catalytic testing with four differently sized α,ω-dienes revealed a dramatically increased macrocyclization (MC) and Z-selectivity of the supported catalysts compared to the homogenous progenitors, allowing high substrate concentrations of 25 mM. With the supported complexes, a maximum increase in MC-selectivity from 27 to 81 % and in Z-selectivity from 17 to 34 % was achieved. In general, smaller mesopores exhibited a stronger confinement effect. A comparison of the two supported tungsten-based catalysts showed that W1@OMS possesses a higher MC-selectivity, while W2@OMS exhibits a higher Z-selectivity which can be rationalized by the structures of the catalysts.}},
  author       = {{Ziegler, Felix and Bruckner, Johanna R. and Nowakowski, Michał and Bauer, Matthias and Probst, Patrick and Atwi, Boshra and Buchmeiser, Michael R.}},
  issn         = {{1867-3880}},
  journal      = {{ChemCatChem}},
  keywords     = {{Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis}},
  number       = {{21}},
  publisher    = {{Wiley}},
  title        = {{{Macrocyclization of Dienes under Confinement with Cationic Tungsten Imido/Oxo Alkylidene <i>N</i>‐Heterocyclic Carbene Complexes}}},
  doi          = {{10.1002/cctc.202300871}},
  volume       = {{15}},
  year         = {{2023}},
}

@article{46481,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Although iron is a dream candidate to substitute noble metals in photoactive complexes, realization of emissive and photoactive iron compounds is demanding due to the fast deactivation of their charge-transfer states. Emissive iron compounds are scarce and dual emission has not been observed before. Here we report the Fe<jats:sup>III</jats:sup> complex [Fe(ImP)<jats:sub>2</jats:sub>][PF<jats:sub>6</jats:sub>] (HImP = 1,1′-(1,3-phenylene)bis(3-methyl-1-imidazol-2-ylidene)), showing a Janus-type dual emission from ligand-to-metal charge transfer (LMCT)- and metal-to-ligand charge transfer (MLCT)-dominated states. This behaviour is achieved by a ligand design that combines four <jats:italic>N</jats:italic>-heterocyclic carbenes with two cyclometalating aryl units. The low-lying <jats:italic>π</jats:italic>* levels of the cyclometalating units lead to energetically accessible MLCT states that cannot evolve into LMCT states. With a lifetime of 4.6 ns, the strongly reducing and oxidizing MLCT-dominated state can initiate electron transfer reactions, which could constitute a basis for future applications of iron in photoredox catalysis.</jats:p>}},
  author       = {{Steube, Jakob and Kruse, Ayla and Bokareva, Olga S. and Reuter, Thomas and Demeshko, Serhiy and Schoch, Roland and Argüello Cordero, Miguel A. and Krishna, Athul and Hohloch, Stephan and Meyer, Franc and Heinze, Katja and Kühn, Oliver and Lochbrunner, Stefan and Bauer, Matthias}},
  issn         = {{1755-4330}},
  journal      = {{Nature Chemistry}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{4}},
  pages        = {{468--474}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Janus-type emission from a cyclometalated iron(iii) complex}}},
  doi          = {{10.1038/s41557-023-01137-w}},
  volume       = {{15}},
  year         = {{2023}},
}

@article{40981,
  abstract     = {{Room temperature sodium-sulfur (RT Na-S) batteries are considered potential candidates for stationary power storage applications due to their low cost, broad active material availability and low toxicity. Challenges, such as high volume expansion of the S-cathode upon discharge, low electronic conductivity of S as active material and herewith limited rate capability as well as the shuttling of polysulfides (PSs) as intermediates often impede the cycle stability and practical application of Na-S batteries. Sulfurized poly(acrylonitrile) (SPAN) inherently inhibits the shuttling of PSs and shows compatibility with carbonate-based electrolytes, however, its exact redox mechanism remained unclear to date. Herein, we implement a commercially available and simple electrolyte into the Na-SPAN cell chemistry and demonstrate its high rate and cycle stability. Through the application of in situ techniques utilizing electronic impedance spectroscopy (EIS) and X-ray absorption spectroscopy (XAS) at different depths of charge and discharge, an insight into SPAN’s redox chemistry is obtained.}},
  author       = {{Kappler, Julian and Tonbul, Güldeniz and Schoch, Roland and Murugan, Saravanakumar and Nowakowski, Michał and Lange, Pia Lena and Klostermann, Sina Vanessa and Bauer, Matthias and Schleid, Thomas and Kästner, Johannes and Buchmeiser, Michael Rudolf}},
  issn         = {{0013-4651}},
  journal      = {{Journal of The Electrochemical Society}},
  keywords     = {{Materials Chemistry, Electrochemistry, Surfaces, Coatings and Films, Condensed Matter Physics, Renewable Energy, Sustainability and the Environment, Electronic, Optical and Magnetic Materials}},
  number       = {{1}},
  publisher    = {{The Electrochemical Society}},
  title        = {{{Understanding the Redox Mechanism of Sulfurized Poly(acrylonitrile) as Highly Rate and Cycle Stable Cathode Material for Sodium-Sulfur Batteries}}},
  doi          = {{10.1149/1945-7111/acb2fa}},
  volume       = {{170}},
  year         = {{2023}},
}

@unpublished{40982,
  abstract     = {{Effective photoinduced charge transfer makes molecular bimetallic assemblies attractive for applications as active light induced proton reduction systems. For a more sustainable future, development of competitive base metal dyads is mandatory. However, the electron transfer mechanisms from the photosensitizer to the proton reduction catalyst in base metal dyads remain so far unexplored. We study a Fe-Co dyad that exhibits photocatalytic H2 production activity using femtosecond X-ray emission spectroscopy, complemented by ultrafast optical spectroscopy and theoretical time-dependent DFT calculations, to understand the electronic and structural dynamics after photoexcitation and during the subsequent charge transfer process from the FeII photosensitizer to the cobaloxime catalyst. Using this novel approach, the simultaneous measurement of the transient Kalpha X-ray emission at the iron and cobalt K-edges in a two-colour experiment is enabled making it possible to correlate the excited state dynamics to the electron transfer processes. The methodology, therefore, provides a clear and direct spectroscopic evidence of the Fe->Co electron transfer responsible for the proton reduction activity.}},
  author       = {{Nowakowski, Michał and Huber-Gedert, Marina and Elgabarty, Hossam and Kubicki, Jacek and Kertem, Ahmet and Lindner, Natalia and Khakhulin, Dimitry and Lima, Frederico Alves and Choi, Tae-Kyu and Biednov, Mykola and Piergies, Natalia and Zalden, Peter and Kubicek, Katerina and Rodriguez-Fernandez, Angel and Salem, Mohammad Alaraby and Kühne, Thomas and Gawelda, Wojciech and Bauer, Matthias}},
  booktitle    = {{arxiv}},
  title        = {{{Ultrafast two-colour X-ray emission spectroscopy reveals excited state landscape in a base metal dyad}}},
  year         = {{2023}},
}

@article{52343,
  abstract     = {{Improved enantioselectivity in the 1,2-addition was observed for chiral Rh norbornadiene catalysts immobilized on ordered mesoporous silica with small pores. Confinement effects were rationalized by experimental and computational studies.}},
  author       = {{Kirchhof, Manuel and Gugeler, Katrin and Beurer, Ann-Katrin and Fischer, Felix Richard and Batman, Derman and Bauch, Soeren M. and Kolin, Sofia and Nicholas, Elliot and Schoch, Roland and Vogler, Charlotte and Kousik, Shravan R. and Zens, Anna and Plietker, Bernd and Atanasova, Petia and Naumann, Stefan and Bauer, Matthias and Bruckner, Johanna R. and Traa, Yvonne and Kästner, Johannes and Laschat, Sabine}},
  issn         = {{2044-4753}},
  journal      = {{Catalysis Science Technology}},
  keywords     = {{Catalysis}},
  number       = {{12}},
  pages        = {{3709--3724}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Tethering chiral Rh diene complexes inside mesoporous solids: experimental and theoretical study of substituent, pore and linker effects on asymmetric catalysis}}},
  doi          = {{10.1039/d3cy00381g}},
  volume       = {{13}},
  year         = {{2023}},
}

@article{49608,
  abstract     = {{<jats:p>The effects of backbone amine functionalization in three new homoleptic C^N^C type ruthenium(II) complexes bearing a tridentate bis‐imidazole‐2‐ylidene pyridine ligand framework are characterized and studied by single crystal diffraction, electrochemistry, optical spectroscopy and transient absorption spectroscopy in combination with ab initio DFT calculations. Functionalization by dimethylamine groups in 4‐position of the pyridine backbone significantly influences the properties of the complexes as revealed by comparison with the unfunctionalized references. As a result of the amine functionalization, a higher molar absorption coefficient of the MLCT bands, a decreased photoluminescence quantum yield at room temperature together with a shortened excited state lifetime but an improved photostability is observed. Introduction of electron donating and withdrawing groups at the NHC unit modifies the electronic and optical properties, such as the oxidation potential, absorption and emission properties, and the lifetimes of the excited states.</jats:p>}},
  author       = {{Fritsch, Lorena and Vukadinovic, Yannik and Lang, Moritz and Naumann, Robert and Bertrams, Maria-Sophie and Kruse, Ayla and Schoch, Roland and Müller, Patrick and Neuba, Adam and Dierks, Philipp and Lochbrunner, Stefan and Kerzig, Christoph and Heinze, Katja and Bauer, Matthias}},
  issn         = {{2367-0932}},
  journal      = {{ChemPhotoChem}},
  keywords     = {{Photo}},
  publisher    = {{Wiley}},
  title        = {{{Chemical and photophysical properties of amine functionalized bis‐NHC‐pyridine‐Ru(II) complexes}}},
  doi          = {{10.1002/cptc.202300281}},
  year         = {{2023}},
}

@article{46548,
  abstract     = {{<jats:p>The use of iron as a replacement for noble metals in photochemical and photophysical applications is challenging due to the typically fast deactivation of short-lived catalytically active states. Recent success of a cyclometalated iron(III) complex utilizing a bis-tridentate ligand motif inspired the use of phenyl-1H-pyrazole as a bidentate ligand. Five complexes using the tris(1-phenylpyrazolato-N,C2)iron(III) complex scaffold are presented. In addition to the parent complex, four derivatives with functionalization in the meta-position of the phenyl ring are thoroughly investigated by single crystal diffractometry, UV-Vis-spectroscopy, and cyclic voltammetry. Advanced X-ray spectroscopy in the form of X-ray absorption and emission spectroscopy allows unique insights into the electronic structure as well as DFT calculations. The ligand design leads to overlapping MLCT and LMCT absorption bands, and emissive behavior is suppressed by low-lying MC states.</jats:p>}},
  author       = {{Hirschhausen, Tanja and Fritsch, Lorena and Lux, Franziska and Steube, Jakob and Schoch, Roland and Neuba, Adam and Egold, Hans and Bauer, Matthias}},
  issn         = {{2304-6740}},
  journal      = {{Inorganics}},
  keywords     = {{Photo}},
  number       = {{7}},
  publisher    = {{MDPI AG}},
  title        = {{{Iron(III)-Complexes with N-Phenylpyrazole-Based Ligands}}},
  doi          = {{10.3390/inorganics11070282}},
  volume       = {{11}},
  year         = {{2023}},
}