Urea-based flexible dicarboxylate linkers for three-dimensional metal-organic frameworks
| Autor: | Gamall Makhloufi, Christoph Janiak, Irina Gruber, Sebastian Glomb |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010405 organic chemistry
Coordination polymer Hydrogen bond Inorganic chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry Solvent chemistry.chemical_compound Crystallography chemistry Materials Chemistry Urea Void volume Metal-organic framework Carboxylate Physical and Theoretical Chemistry Linker |
| Zdroj: | Inorganica Chimica Acta. 475:35-46 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2017.09.029 |
| Popis: | The metal-organic frameworks (MOFs) 3D-[Mn 2 (L1) 2 (DMF)]·2DMF ( 1 ), 3D-[Cd 2 (L2) 2 (DMF) 3 ] ( 3 ), [Zn 2 (L2) 2 (DMF) 3 ] ( 4 ) and 3D-[Mn 2 (L2) 2 (DMF) 3 ] ( 5 ) are the first examples of three-dimensional metal-organic networks constructed from a single ditopic dicarboxylate linker (i.e., without bridging co-ligands) with an urea group in the linker axis (L1 2− = 4,4′-(carbonylbis(azanediyl))dibenzoate; L2 2− = 4,4′-(carbonylbis(azanediyl))bis(3-methylbenzoate), DMF = dimethylformamide). From Cd 2+ and L1 2− a 1D coordination polymer 1D-[Cd(L1)(DMF) 3 ] ( 2 ) is formed. The urea group is engaged in hydrogen bonding with the C(4)[R 1 2 (6)] motif to an oxygen atom of a DMF solvent (in 1 ) or a metal-coordinated carboxylate group (in 3 – 5 ). Network 1 has infinite channels with parallelepiped cross sections and 30% solvent-filled volume. The 3 D frameworks 3 – 5 are of diamond (6,6), dia topology with a single framework having large voids with 17.6 A and 19.7 A nodal separation. Thus, four symmetry-related nets interpenetrate, organized via H-bonds in the C(4)[R 1 2 (6)] motif, still leaving about 50% solvent-filled void volume in the fourfold interpenetrated structure. |
| Databáze: | OpenAIRE |
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