@article{25991, abstract = {{Periodically ordered mesoporous magnesium oxide was synthesized in a double replication procedure. Mesoporous SBA-15 silica and CMK-3 carbon were successively used as hard structure matrixes. The carbon pore system was infiltrated with Mg(NO3)2, which was then converted to MgO at 573 K; the carbon matrix was finally removed by thermal combustion. The structure of the mesoporous MgO corresponds to that of the original SBA-15 silica. The products consist of hexagonally arranged cylindrical mesopores and crystalline pore walls. The efficiency of the replication series was studied by variation of the infiltration method and comprehensive pore size analysis of all involved mesoporous materials. The in situ formation of MgO inside the CMK-3 carbon pore system was monitored by thermal analysis. Postsynthetic treatment of the products at 823 K in a vacuum prior to removal of the carbon matrix was found to improve the crystallinity but to diminish the periodic order of the pore system.}}, author = {{Roggenbuck, Jan and Koch, Günter and Tiemann, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{4151--4156}}, title = {{{Synthesis of Mesoporous Magnesium Oxide by CMK-3 Carbon Structure Replication}}}, doi = {{10.1021/cm060740s}}, year = {{2006}}, } @article{35355, author = {{Kleinschmidt, Felix and Hickl, Markus and Saalwächter, Kay and Schmidt, Claudia and Finkelmann, Heino}}, issn = {{0024-9297}}, journal = {{Macromolecules}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Polymers and Plastics, Organic Chemistry}}, number = {{23}}, pages = {{9772--9782}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Lamellar Liquid Single Crystal Hydrogels:  Synthesis and Investigation of Anisotropic Water Diffusion and Swelling}}}, doi = {{10.1021/ma051479o}}, volume = {{38}}, year = {{2005}}, } @article{35356, author = {{Becker, Patrick and Siebert, Hartmut and Noirez, Laurence and Schmidt, Claudia}}, issn = {{1022-1360}}, journal = {{Macromolecular Symposia}}, keywords = {{Materials Chemistry, Polymers and Plastics, Organic Chemistry, Condensed Matter Physics}}, number = {{1}}, pages = {{111--122}}, publisher = {{Wiley}}, title = {{{Shear-Induced Order in Nematic Polymers}}}, doi = {{10.1002/masy.200550209}}, volume = {{220}}, year = {{2005}}, } @article{39764, author = {{Matthias, Heinrich and Röder, Thorsten and Wehrspohn, Ralf B. and Kitzerow, Heinz-Siegfried and Matthias, Sven and Picken, Stephen J.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{24}}, publisher = {{AIP Publishing}}, title = {{{Spatially periodic liquid crystal director field appearing in a photonic crystal template}}}, doi = {{10.1063/1.2142100}}, volume = {{87}}, year = {{2005}}, } @article{39767, author = {{Mertens, G. and Wehrspohn, R. B. and Kitzerow, Heinz-Siegfried and Matthias, S. and Jamois, C. and Gösele, U.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{24}}, publisher = {{AIP Publishing}}, title = {{{Tunable defect mode in a three-dimensional photonic crystal}}}, doi = {{10.1063/1.2139846}}, volume = {{87}}, year = {{2005}}, } @article{39768, author = {{Paelke, Lutz and Kitzerow, Heinz-Siegfried and Strohriegl, Peter}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{3}}, publisher = {{AIP Publishing}}, title = {{{Photorefractive polymer-dispersed liquid crystal based on a photoconducting polysiloxane}}}, doi = {{10.1063/1.1852082}}, volume = {{86}}, year = {{2005}}, } @article{39770, author = {{Stich, N. and Kitzerow, Heinz-Siegfried}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, keywords = {{General Physics and Astronomy}}, number = {{3}}, publisher = {{AIP Publishing}}, title = {{{Superposition of patterns in cross-linked liquid crystals}}}, doi = {{10.1063/1.1832744}}, volume = {{97}}, year = {{2005}}, } @article{39973, author = {{Kitzerow, Heinz-Siegfried}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, keywords = {{Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics}}, number = {{10}}, pages = {{628--632}}, publisher = {{Wiley}}, title = {{{News about Soft Condensed Matter—A Liquid Crystal Meeting Review}}}, doi = {{10.1002/1439-7641(20011015)2:10<628::aid-cphc628>3.0.co;2-7}}, volume = {{2}}, year = {{2005}}, } @article{39986, author = {{Hassheider, Thomas and Benning, Stephan A. and Kitzerow, Heinz-Siegfried and Achard, Marie-France and Bock, Harald}}, issn = {{1433-7851}}, journal = {{Angewandte Chemie International Edition}}, keywords = {{General Chemistry, Catalysis}}, number = {{11}}, pages = {{2060--2063}}, publisher = {{Wiley}}, title = {{{Color-Tuned Electroluminescence from Columnar Liquid Crystalline Alkyl Arenecarboxylates}}}, doi = {{10.1002/1521-3773(20010601)40:11<2060::aid-anie2060>3.0.co;2-h}}, volume = {{40}}, year = {{2005}}, } @article{39993, author = {{Mießen, Nicole and Strauß, Jochen and Hoischen, Andreas and Kürschner, Kathrin and Kitzerow, Heinz-Siegfried}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, keywords = {{Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics}}, number = {{11}}, pages = {{691--694}}, publisher = {{Wiley}}, title = {{{Durable Micropatterns Obtained from Dissipative Structures in Liquid Crystals}}}, doi = {{10.1002/1439-7641(20011119)2:11<691::aid-cphc691>3.0.co;2-s}}, volume = {{2}}, year = {{2005}}, } @article{38014, author = {{Rössle, Michael and Werner, Thomas and Frey, Wolfgang and Christoffers, Jens}}, issn = {{1434-193X}}, journal = {{European Journal of Organic Chemistry}}, keywords = {{Organic Chemistry, Physical and Theoretical Chemistry}}, number = {{23}}, pages = {{5031--5038}}, publisher = {{Wiley}}, title = {{{Cerium-Catalyzed, Aerobic Oxidative Synthesis of 1,2-Dioxane Derivatives from Styrene and Their Fragmentation into 1,4-Dicarbonyl Compounds}}}, doi = {{10.1002/ejoc.200500487}}, volume = {{2005}}, year = {{2005}}, } @article{41289, author = {{Feth, Martin P. and Bauer, Matthias and Kickelbick, Guido and Metelkina, Olga and Schubert, Ulrich and Bertagnolli, Helmut}}, issn = {{0022-3093}}, journal = {{Journal of Non-Crystalline Solids}}, keywords = {{Materials Chemistry, Condensed Matter Physics, Ceramics and Composites, Electronic, Optical and Magnetic Materials}}, number = {{5}}, pages = {{432--443}}, publisher = {{Elsevier BV}}, title = {{{Influence of additives and post-synthesis treatment on the structural properties of sol–gel prepared alumina-doped zirconia studied by EXAFS-spectroscopy and X-ray diffraction}}}, doi = {{10.1016/j.jnoncrysol.2004.12.012}}, volume = {{351}}, year = {{2005}}, } @article{41287, author = {{Bauer, Matthias and Kauf, Thomas and Christoffers, Jens and Bertagnolli, Helmut}}, issn = {{1463-9076}}, journal = {{Physical Chemistry Chemical Physics}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}}, number = {{13}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Investigations into the metal species of the homogeneous iron(iii) catalyzed Michael addition reactions}}}, doi = {{10.1039/b501204j}}, volume = {{7}}, year = {{2005}}, } @article{42015, author = {{Kramer, Thomas and Schweins, Ralf and Huber, Klaus}}, issn = {{0021-9606}}, journal = {{The Journal of Chemical Physics}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}}, number = {{1}}, publisher = {{AIP Publishing}}, title = {{{Small-angle neutron scattering of dilute polystyrene chains at the protein limit of a colloid-polymer mixture}}}, doi = {{10.1063/1.1946751}}, volume = {{123}}, year = {{2005}}, } @article{42017, author = {{Kramer, Thomas and Schweins, Ralf and Huber, Klaus}}, issn = {{0024-9297}}, journal = {{Macromolecules}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Polymers and Plastics, Organic Chemistry}}, number = {{1}}, pages = {{151--159}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Silsesquioxane Molecules and Polystyrene Chains as a Model System for Colloid−Polymer Mixtures in the Protein Limit}}}, doi = {{10.1021/ma048766x}}, volume = {{38}}, year = {{2005}}, } @article{42014, author = {{Kramer, Thomas and Schweins, Ralf and Huber, Klaus}}, issn = {{0024-9297}}, journal = {{Macromolecules}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Polymers and Plastics, Organic Chemistry}}, number = {{23}}, pages = {{9783--9793}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Coil Dimensions of Polystyrene Chains in Colloid−Polymer Mixtures at the Protein Limit:  A SANS Study}}}, doi = {{10.1021/ma051308j}}, volume = {{38}}, year = {{2005}}, } @article{25995, abstract = {{The early stages of ZnS nanoparticle growth from supersaturated solution are investigated in situ by stopped-flow UV absorption spectroscopy with a time resolution of 1.28 ms. A model for data analysis is suggested which makes it possible to study both the average particle radius and the concentration. The average radii lie in the sub-nanometer range. During the first 40 ms, growth is predominantly governed by ripening.}}, author = {{Tiemann, Michael and Weiß, Özlem and Hartikainen, Juha and Marlow, Frank and Lindén, Mika}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, pages = {{2113--2119}}, title = {{{Early Stages of ZnS Nanoparticle Growth Studied by In-Situ Stopped-Flow UV Absorption Spectroscopy}}}, doi = {{10.1002/cphc.200500163}}, year = {{2005}}, } @article{25994, abstract = {{Periodically ordered mesoporous magnesium oxides were synthesized by utilization of mesoporous CMK-3 carbon as exotemplate. The products exhibit high thermal stability and basic properties, which makes them promising for application in heterogeneous basic catalysis.}}, author = {{Roggenbuck, Jan and Tiemann, Michael}}, issn = {{0002-7863}}, journal = {{Journal of the American Chemical Society}}, pages = {{1096--1097}}, title = {{{Ordered Mesoporous Magnesium Oxide with High Thermal Stability Synthesized by Exotemplating Using CMK-3 Carbon}}}, doi = {{10.1021/ja043605u}}, year = {{2005}}, } @article{58598, abstract = {{AbstractA series of bis‐guanidine ligands designed for use in biomimetic coordination chemistry has been extended to a library matrix combining unprecedented substitutional flexibility within the guanidyl residues with a wide range of aliphatic and aromatic spacers connecting these functionalities. The underlying protocol can be used with predefined ureas as well as secondary amines to build up these units by reaction with phosgene if the ureas are otherwise unavailable. In the latter case, the resulting urea intermediates do not have to be isolated as the reaction proceeds further with additional phosgene to yield a chloroformamidinium chloride which is transformed into the bis‐guanidine functionality by subsequent reaction with a suitable primary diamine in the presence of triethylamine as an auxiliary base. This concept has been used to synthesise and characterise more then two dozen different bis‐guanidines based on 12 discrete monoguanidine units and seven different spacers. These spacers have been chosen such that the most important phenotypes have been dealt with and which range from rigid to more flexible scaffolds. In addition to spacers with no metal‐binding capabilities, other species containing further donor functions such as N‐methyldiphenyleneamine or pyridine‐2,6‐diyl have also been used. The substitution patterns of the guanidine residues can be classified into acyclic and cyclic types. Among the cyclic types, one subset is characterised by five‐ or six‐membered heterocycles containing both the amino nitrogen atoms and another one by individual N‐heterocyclic systems for each amino nitrogen. Structurally characterised examples are 2‐{2‐[2‐(tetramethylguanidi­no)ethoxy]ethoxy}‐1‐(tetramethylguanidino)ethane (TMG2doo) in its diprotonated form and 2,2′‐bis[2N‐(1,1′,3,3′‐tetramethylguanidine)]diphenyleneamine (TMG2PA) as wellas N1,N3‐bis(dimorpholinomethylene)propane‐1,3‐diamine (DMorphG2p) as free bases. For the permethylated bis‐guanidine derivatives, the barrier to rotation around the (C=N)guanidine bond has been determined by means of temperature‐dependent EXSY 1H NMR spectroscopy to range between 54 and 79 kJ mol–1 depending on the type of spacer. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)}}, author = {{Herres‐Pawlis, Sonja and Neuba, Adam and Seewald, Oliver and Seshadri, Tarimala and Egold, Hans and Flörke, Ulrich and Henkel, Gerald}}, issn = {{1434-193X}}, journal = {{European Journal of Organic Chemistry}}, number = {{22}}, pages = {{4879--4890}}, publisher = {{Wiley}}, title = {{{A Library of Peralkylated Bis‐guanidine Ligands for Use in Biomimetic Coordination Chemistry}}}, doi = {{10.1002/ejoc.200500340}}, volume = {{2005}}, year = {{2005}}, } @article{58597, abstract = {{AbstractSyntheses and Structure of Chiral Metallatetrahedron Complexes of the Type [Re2(M1PPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M1 = Ag, Au; M2 = Cu, Ag, Au)From the reaction of Li[Re2(μ‐H)(μ‐PCy2)(CO)7(C(Ph)O)] (1) with Ph3AuC≡CPh both benzaldehyde and the trinuclear complex Li[Re2(AuPPh3)(μ‐PCy2)(CO)7C≡CPh] (2a) were obtained in high yield. The complex anion was isolated as its PPh4‐salt 2b. The latter reacts with coinage metal complexes PPh3M2Cl [M2 = Cu, Ag, Au] to give chiral heterometallatetrahedranes of the general formula [Re2(AuPPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M2 = Cu 3a, Ag 3b, Au 3c). The corresponding complex [Re2(AgPPh3)2(μ‐PCy2)(CO)7C≡CPh] (3d) is obtained from the reaction of [Re2(AgPPh3)2(μ‐PCy2)(CO)7Cl] (4) with LiC≡CPh. 3d undergoes a metathesis reaction in the presence of PPh3CuCl giving [Re2(AgPPh3)(CuPPh3)(μ‐PCy2)(CO)7C≡CPh] (3e) and PPh3AgCl. Analogous metathesis reactions are observed when 3c is reacted with PPh3AgCl or PPh3CuCl giving 3a or 3b, respectively. The reaction of 1 with PPh3AuCl gives benzaldehyde and Li[Re2(AuPPh3)(μ‐PCy2)(CO)7Cl] (5a) which upon reaction with PhLi forms the trinuclear complex Li[Re2(AuPPh3)(μ‐PCy2)(CO)7Ph] (6a). Again this complex was isolated as its PPh4‐salt 6b. In contrast to 2b, 6b reacts with one equivalent of Ph3PAuCl by transmetalation to give Ph3PAuPh and PPh4[Re2(AuPPh3)(μ‐PCy2)(CO)7Cl] (5b). The X‐ray structures of the compounds 3a, 3b, 3e and 4 are reported.}}, author = {{Seewald, Oliver and Flörke, Ulrich and Egold, Hans and Haupt, Hans‐Jürgen and Schwefer, Meinhard}}, issn = {{0044-2313}}, journal = {{Zeitschrift für anorganische und allgemeine Chemie}}, number = {{2}}, pages = {{204--210}}, publisher = {{Wiley}}, title = {{{Synthese und Struktur chiraler Heterometallatetrahedrane des Typs [Re2(M1PPh3)(M2PPh3)(μ‐PCy2)(CO)7C≡CPh] (M1 = Ag, Au; M2 = Cu, Ag, Au)}}}, doi = {{10.1002/zaac.200500340}}, volume = {{632}}, year = {{2005}}, }