[{"status":"public","abstract":[{"lang":"eng","text":"Seven novel dirhodium coordination polymers (Rh-2-Ln) (n = 1-7) are prepared by employing bitopic ligands to connect dirhodium nodes. The formation of the framework is confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) and H-1 C-13 cross polarization magic angle spinning nuclear magnetic resonance (CP MAS NMR) spectroscopy. Defect sites resulting from incomplete ligand substitution are revealed by F-19 MAS NMR. The random stacking behavior of the frameworks in the obtained solid is analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Rh-2/O interaction in neighboring layers is investigated by diffuse reflectance ultra-violet visible light (DR-UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS). This interaction is relevant to understand the catalytic behavior of various Rh-2-Ln catalysts in the cyclopropanation of styrene with ethyl diazoacetate (EDA). In this context, the structure-reactivity relationship is discussed by taking into consideration both interlayer Rh-2/O interactions and steric effects of side chains."}],"publication":"Catalysis Science & Technology","type":"journal_article","language":[{"iso":"eng"}],"extern":"1","keyword":["Chemistry","asymmetric cyclopropanation","c-h insertion","carbene transformations","carboxylates","catalysts","functionalization","immobilization","metal-organic frameworks","nmr","solid support"],"user_id":"100715","_id":"64010","intvolume":"         8","page":"5190–5200","citation":{"ama":"Liu JQ, Xu YP, Groszewicz PB, et al. Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation. <i>Catalysis Science &#38; Technology</i>. 2018;8(20):5190–5200. doi:<a href=\"https://doi.org/10.1039/c8cy01493k\">10.1039/c8cy01493k</a>","chicago":"Liu, J. Q., Y. P. Xu, P. B. Groszewicz, M. Brodrecht, C. Fasel, K. Hofmann, X. J. Tan, Torsten Gutmann, and G. Buntkowsky. “Novel Dirhodium Coordination Polymers: The Impact of Side Chains on Cyclopropanation.” <i>Catalysis Science &#38; Technology</i> 8, no. 20 (2018): 5190–5200. <a href=\"https://doi.org/10.1039/c8cy01493k\">https://doi.org/10.1039/c8cy01493k</a>.","ieee":"J. Q. Liu <i>et al.</i>, “Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation,” <i>Catalysis Science &#38; Technology</i>, vol. 8, no. 20, pp. 5190–5200, 2018, doi: <a href=\"https://doi.org/10.1039/c8cy01493k\">10.1039/c8cy01493k</a>.","apa":"Liu, J. Q., Xu, Y. P., Groszewicz, P. B., Brodrecht, M., Fasel, C., Hofmann, K., Tan, X. J., Gutmann, T., &#38; Buntkowsky, G. (2018). Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation. <i>Catalysis Science &#38; Technology</i>, <i>8</i>(20), 5190–5200. <a href=\"https://doi.org/10.1039/c8cy01493k\">https://doi.org/10.1039/c8cy01493k</a>","bibtex":"@article{Liu_Xu_Groszewicz_Brodrecht_Fasel_Hofmann_Tan_Gutmann_Buntkowsky_2018, title={Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation}, volume={8}, DOI={<a href=\"https://doi.org/10.1039/c8cy01493k\">10.1039/c8cy01493k</a>}, number={20}, journal={Catalysis Science &#38; Technology}, author={Liu, J. Q. and Xu, Y. P. and Groszewicz, P. B. and Brodrecht, M. and Fasel, C. and Hofmann, K. and Tan, X. J. and Gutmann, Torsten and Buntkowsky, G.}, year={2018}, pages={5190–5200} }","mla":"Liu, J. Q., et al. “Novel Dirhodium Coordination Polymers: The Impact of Side Chains on Cyclopropanation.” <i>Catalysis Science &#38; Technology</i>, vol. 8, no. 20, 2018, pp. 5190–5200, doi:<a href=\"https://doi.org/10.1039/c8cy01493k\">10.1039/c8cy01493k</a>.","short":"J.Q. Liu, Y.P. Xu, P.B. Groszewicz, M. Brodrecht, C. Fasel, K. Hofmann, X.J. Tan, T. Gutmann, G. Buntkowsky, Catalysis Science &#38; Technology 8 (2018) 5190–5200."},"year":"2018","issue":"20","publication_identifier":{"issn":["2044-4753"]},"doi":"10.1039/c8cy01493k","title":"Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation","volume":8,"date_created":"2026-02-07T15:57:34Z","author":[{"full_name":"Liu, J. Q.","last_name":"Liu","first_name":"J. Q."},{"full_name":"Xu, Y. P.","last_name":"Xu","first_name":"Y. P."},{"first_name":"P. B.","full_name":"Groszewicz, P. B.","last_name":"Groszewicz"},{"first_name":"M.","full_name":"Brodrecht, M.","last_name":"Brodrecht"},{"first_name":"C.","last_name":"Fasel","full_name":"Fasel, C."},{"full_name":"Hofmann, K.","last_name":"Hofmann","first_name":"K."},{"last_name":"Tan","full_name":"Tan, X. J.","first_name":"X. J."},{"first_name":"Torsten","last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten"},{"full_name":"Buntkowsky, G.","last_name":"Buntkowsky","first_name":"G."}],"date_updated":"2026-02-17T16:15:22Z"},{"year":"2016","page":"3409–3416","intvolume":"         8","citation":{"chicago":"Srour, Mohamad, Sara Hadjiali, Grit Sauer, Kai Brunnengräber, Hergen Breitzke, Yeping Xu, Heiko Weidler, Hans-Heinrich Limbach, Torsten Gutmann, and Gerd Buntkowsky. “Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance.” <i>ChemCatChem</i> 8, no. 21 (2016): 3409–3416. <a href=\"https://doi.org/10.1002/cctc.201600882\">https://doi.org/10.1002/cctc.201600882</a>.","ieee":"M. Srour <i>et al.</i>, “Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance,” <i>ChemCatChem</i>, vol. 8, no. 21, pp. 3409–3416, 2016, doi: <a href=\"https://doi.org/10.1002/cctc.201600882\">10.1002/cctc.201600882</a>.","ama":"Srour M, Hadjiali S, Sauer G, et al. Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance. <i>ChemCatChem</i>. 2016;8(21):3409–3416. doi:<a href=\"https://doi.org/10.1002/cctc.201600882\">10.1002/cctc.201600882</a>","mla":"Srour, Mohamad, et al. “Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance.” <i>ChemCatChem</i>, vol. 8, no. 21, 2016, pp. 3409–3416, doi:<a href=\"https://doi.org/10.1002/cctc.201600882\">10.1002/cctc.201600882</a>.","bibtex":"@article{Srour_Hadjiali_Sauer_Brunnengräber_Breitzke_Xu_Weidler_Limbach_Gutmann_Buntkowsky_2016, title={Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance}, volume={8}, DOI={<a href=\"https://doi.org/10.1002/cctc.201600882\">10.1002/cctc.201600882</a>}, number={21}, journal={ChemCatChem}, author={Srour, Mohamad and Hadjiali, Sara and Sauer, Grit and Brunnengräber, Kai and Breitzke, Hergen and Xu, Yeping and Weidler, Heiko and Limbach, Hans-Heinrich and Gutmann, Torsten and Buntkowsky, Gerd}, year={2016}, pages={3409–3416} }","short":"M. Srour, S. Hadjiali, G. Sauer, K. Brunnengräber, H. Breitzke, Y. Xu, H. Weidler, H.-H. Limbach, T. Gutmann, G. Buntkowsky, ChemCatChem 8 (2016) 3409–3416.","apa":"Srour, M., Hadjiali, S., Sauer, G., Brunnengräber, K., Breitzke, H., Xu, Y., Weidler, H., Limbach, H.-H., Gutmann, T., &#38; Buntkowsky, G. (2016). Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance. <i>ChemCatChem</i>, <i>8</i>(21), 3409–3416. <a href=\"https://doi.org/10.1002/cctc.201600882\">https://doi.org/10.1002/cctc.201600882</a>"},"issue":"21","title":"Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance","doi":"10.1002/cctc.201600882","date_updated":"2026-02-17T16:13:06Z","volume":8,"date_created":"2026-02-07T16:12:46Z","author":[{"first_name":"Mohamad","full_name":"Srour, Mohamad","last_name":"Srour"},{"full_name":"Hadjiali, Sara","last_name":"Hadjiali","first_name":"Sara"},{"last_name":"Sauer","full_name":"Sauer, Grit","first_name":"Grit"},{"first_name":"Kai","last_name":"Brunnengräber","full_name":"Brunnengräber, Kai"},{"first_name":"Hergen","full_name":"Breitzke, Hergen","last_name":"Breitzke"},{"full_name":"Xu, Yeping","last_name":"Xu","first_name":"Yeping"},{"first_name":"Heiko","last_name":"Weidler","full_name":"Weidler, Heiko"},{"last_name":"Limbach","full_name":"Limbach, Hans-Heinrich","first_name":"Hans-Heinrich"},{"first_name":"Torsten","id":"118165","full_name":"Gutmann, Torsten","last_name":"Gutmann"},{"full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky","first_name":"Gerd"}],"abstract":[{"text":"A novel strategy for the immobilization of Wilkinson’s catalyst on silica nanoparticles is presented, employing pyridyl linkers as anchoring groups. The coordination binding of the catalyst to the pyridyl linker via ligand exchange of the trans-phosphine group is verified by 1 D and 2 D solid-state NMR spectroscopy. Catalytic activities are monitored by GC employing the hydrogenation of styrene as model reaction, and the leaching properties as well as the robustness of the catalyst are investigated. The resulting immobilized catalyst shows high catalytic activity, which is within a factor of three comparable to the homogeneous catalyst, and excellent stability in leaching tests. Finally, it is efficient to produce hyperpolarization in solution by employing parahydrogen-enriched hydrogen gas for hydrogenation.","lang":"eng"}],"status":"public","publication":"ChemCatChem","type":"journal_article","keyword":["heterogeneous catalysis","hydrogenation","immobilization","phosphane ligands","rhodium"],"language":[{"iso":"eng"}],"extern":"1","_id":"64047","user_id":"100715"}]