title: Aluminum-1,4-cyclohexanedicarboxylates: high-throughput and temperature-dependent in situ EDXRD studies.
abstract: The system AlCl3·6H2O/cis-H2CDC/trans-H2CDC/solvent was systematically investigated with high-throughput methods to study the influence of the two 1,4-cyclohexanedicarboxylate isomers (cis- and trans-H2CDC) as flexible aliphatic linker molecules on the formation of new crystalline compounds. Using the cis-isomer, the layered inorganic-organic hybrid compound [Al(OH)(cis-CDC)] (1) is formed. The use of trans-H2CDC leads to the microporous MOF [Al(OH)(trans-CDC)]·H2O (2) denoted CAU-13. Its framework is related to the well-known MIL-53, which was previously described for trivalent cations and rigid terephthalate linker molecules. The crystal structures of 1 and 2 were derived from powder X-ray diffraction data. Temperature-dependent in situ energy dispersive X-ray diffraction (EDXRD) experiments for the synthesis of 2 were carried out at HASYLAB, DESY, Hamburg. The kinetic analysis, applying the Gualtieri model to the experimental data, revealed Arrhenius activation energies of 76 kJ/mol for both the nucleation and the growth process. These values do not differ much from the activation energies reported for MOFs with aromatic rigid linker molecules.
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth Straße 2, 24118 Kiel, Germany.
authors.forename: Felicitas
authors.initials: F
authors.lastname: Niekiel
authors.forename: Maximilian
authors.initials: M
authors.lastname: Ackermann
authors.forename: Paul
authors.initials: P
authors.lastname: Guerrier
authors.forename: André
authors.initials: A
authors.lastname: Rothkirch
authors.forename: Norbert
authors.initials: N
authors.lastname: Stock
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D002264:Carboxylic Acids / Q000737:chemistry*; D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D002264:Carboxylic Acids; D009942:Organometallic Compounds; D000535:Aluminum