@article{41997, author = {{Cravillon, Janosch and Münzer, Simon and Lohmeier, Sven-Jare and Feldhoff, Armin and Huber, Klaus and Wiebcke, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, keywords = {{Materials Chemistry, General Chemical Engineering, General Chemistry}}, number = {{8}}, pages = {{1410--1412}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Rapid Room-Temperature Synthesis and Characterization of Nanocrystals of a Prototypical Zeolitic Imidazolate Framework}}}, doi = {{10.1021/cm900166h}}, volume = {{21}}, year = {{2009}}, } @article{25978, abstract = {{In recent years, a lot of research activity has focused on the synthesis of new ordered porous materials by utilization of porous matrices as templates. Since the matrices are themselves created by templating procedures, the entire process can be envisaged as “repeated templating”. This review describes recent conceptual developments in the field of structure replication and summarizes the large number of publications on new functional materials prepared by this method.}}, author = {{Tiemann, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{961--971}}, title = {{{Repeated Templating}}}, doi = {{10.1021/cm702050s}}, year = {{2008}}, } @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{25996, abstract = {{In situ Synchrotron SAXS/XRD Study on the Formation of Ordered Mesoscopic Hybrid Materials with Crystal-Like Walls...}}, author = {{Morell, Jürgen and Teixeira, Cilaine V. and Cornelius, Maximilian and Rebbin, Vivian and Tiemann, Michael and Amenitsch, Heinz and Fröba, Michael and Lindén, Mika}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{5564--5566}}, title = {{{In situ Synchrotron SAXS/XRD Study on the Formation of Ordered Mesoscopic Hybrid Materials with Crystal-Like Walls}}}, doi = {{10.1021/cm048453g}}, year = {{2004}}, } @article{26003, abstract = {{Long-chain n-alkylamine surfactants have been used as structure-directing agents in the synthesis of mesoporous aluminophosphates by a highly cooperative formation mechanism in an alcoholic system. Small amounts of water in the synthesis mixture play a significant role in the hydrolysis of the aluminum precursor (Al[OiPr]3) and are important for the quality of the mesostructured products. The materials exhibit disordered mesostructures, the stability and structural order of which can be improved by a postsynthetic thermal treatment. The products are then stable enough for the removal of the surfactant molecules by acidic solvent extraction, yielding surface areas up to 690 m2/g.}}, author = {{Tiemann, Michael and Schulz, Marcus and Jäger, Christian and Fröba, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{2885--2891}}, title = {{{Mesoporous Aluminophosphate Molecular Sieves Synthesized under Nonaqueous Conditions}}}, doi = {{10.1021/cm011044p}}, year = {{2001}}, } @article{26002, abstract = {{Over the past few years a growing number of scientists have dedicated their attention to the synthesis of mesostructured aluminophosphates following the concept of supramolecular structure direction. Their research has produced a large variety of synthetic approaches and yielded materials with various structural properties. Today a substantial number of publications have accumulated; this short review provides a general summary of the literature with the aim to display the opportunities for future work.}}, author = {{Tiemann, Michael and Fröba, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{3211--3217}}, title = {{{Mesostructured Aluminophosphates Synthesized with Supramolecular Structure Directors}}}, doi = {{10.1021/cm0110371}}, year = {{2001}}, } @article{26005, abstract = {{Mesostructured aluminophosphate/dodecyl phosphate composite materials were synthesized under aqueous and alcoholic conditions. The syntheses were monitored by temperature- and time-resolved in-situ small-angle X-ray scattering (SAXS). In the aqueous synthesis, a lamellar mesostructure is formed within the first few minutes of the reaction; this structure maintains a constant d spacing independent of the reaction time and temperature. The alcoholic synthesis at low temperature yields a mixture of a lamellar and a supposedly inverted hexagonal mesostructure. SAXS investigations show that these two phases evolve competitively. The lamellar structure is favored by higher temperatures and/or longer synthesis times; above ∼70 °C it is formed exclusively. Mixtures of both phases can be isolated as solid materials, but thermal analysis shows that the inverted hexagonal product transforms into the lamellar phase at ∼35−43 °C. The alcoholic synthesis is a highly cooperative reaction; the pure surfactant/alcohol systems are not lyotropic as long as the inorganic reactants are absent. In comparison, the surfactant/water system with the same surfactant concentrations as employed for the aqueous syntheses is lyotropic with a lamellar structure.}}, author = {{Tiemann, Michael and Fröba, M. and Rapp, G. and Funari, S. S.}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{1342--1348}}, title = {{{Nonaqueous Synthesis of Mesostructured Aluminophosphate/Surfactant Composites:  Synthesis, Characterization, and In-Situ SAXS Studies}}}, doi = {{10.1021/cm991165d}}, year = {{2000}}, } @article{26009, abstract = {{Lamellar mesostructured aluminophosphates were synthesized from aluminum triisopropoxide and phosphoric acid; monododecyl phosphate surfactant was used as structure-directing template. Depending on the relative Al/P ratio in the samples, variable relative amounts of tetrahedrally and octahedrally coordinated Al are found, indicating that both aluminophosphate and aluminum oxide species (as thermodynamically favored) are being formed in the syntheses. This is investigated quantitatively by Al K-edge XANES spectroscopy. The same syntheses were carried out without phosphoric acid, resulting in similar lamellar structures. The inorganic lamellae of these products consist to a significant extent of aluminophosphate rather than exclusively of aluminum oxide, which means that the phosphate headgroups of the surfactant molecules become incorporated into the inorganic network. Thus, for the first time, the surfactant serves as both template and reactant.}}, author = {{Fröba, Michael and Tiemann, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{3475--3483}}, title = {{{A New Role of the Surfactant in the Synthesis of Mesostructured Phases:  Dodecyl Phosphate as Template and Reactant for Aluminophosphates}}}, doi = {{10.1021/cm980712c}}, year = {{1998}}, } @article{40301, author = {{Buey, Julio and Díez, Laura and Espinet, Pablo and Kitzerow, Heinz-Siegfried and Miguel, Jesús A.}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, keywords = {{Materials Chemistry, General Chemical Engineering, General Chemistry}}, number = {{9}}, pages = {{2375--2381}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Platinum Orthometalated Liquid Crystals Compared with Their Palladium Analogues. First Optical Storage Effect in an Organometallic Liquid Crystal}}}, doi = {{10.1021/cm960202n}}, volume = {{8}}, year = {{1996}}, }