Synthesis, crystal structure and properties of a new 3D supramolecular unsymmetrical tetradentate Schiff bases copper (II) framework with stable tunnels
| Autor: | Fatima T. Esmadi, Raiid Al-Razagg, Mousa Al-Noaimi, Firas F. Awwadi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Schiff base
010405 organic chemistry Ligand Organic Chemistry Inorganic chemistry Supramolecular chemistry Stacking Space group Crystal structure 010402 general chemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Inorganic Chemistry Perchlorate chemistry.chemical_compound Crystallography chemistry Spectroscopy Coordination geometry |
| Zdroj: | Journal of Molecular Structure. 1125:464-469 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2016.07.024 |
| Popis: | Flexible unsymmetrical Schiff base ligand (L) which is derived from the half unit Y = C6H5COCH2C(N CH2C6H4NH2)CH3 (obtained from the reaction of benzoylacetone and 2-aminobenzylamine) and 2- quinolinecarboxaldehyde have been successfully co-assembled with Cu(ClO4)2 to give out the [Cu(L)]ClO4 complex. The complex crystallizes in two different space groups; P21/n and P-1. The crystal structure of the P-1 phase indicates the presence of tunnels; the volume of these tunnels is 157 A3 which is big enough to accommodate solvent molecules. The X-ray data indicates that these tunnels are most probably filled by highly disordered solvent molecules or solvent molecules with partial occupancy. The tunneled structure is stabilized via π–π stacking interactions to give a supramolecular MOF with 1D rhomboidal tunnels array. The copper(II) atom assumes a distorted-square pyrimidal coordination geometry where the perchlorate is located on the apex of the pyramide. In addition, this work presents and discusses the spectroscopic (IR, UV/vis), electro-chemical (cyclic voltammetry) behavior of the Cu(II) complexes. The Cu(II) oxidation state is stabilized by the novel tetradentate ligands, showing Cu(I/II) couple around 0.1 vs. Cp2Fe/Cp2Fe+. |
| Databáze: | OpenAIRE |
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