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- Title
Synthesis, structure and characterization of two copper(II) supramolecular coordination polymers based on a multifunctional ligand 2-amino-4-sulfobenzoic acid.
- Authors
Wei, Yan; Zhang, Lei; Wang, Meng-Jie; Chen, Si-Chun; Wang, Zi-Hao; Zhang, Kou-Lin
- Abstract
Copper(II) coordination polymers have attracted considerable interest due to their catalytic, adsorption, luminescence and magnetic properties. The reactions of copper(II) with 2-amino-4-sulfobenzoic acid (H2asba) in the presence/absence of the auxiliary chelating ligand 1,10-phenanthroline (phen) under ambient conditions yielded two supramolecular coordination polymers, namely (3-amino-4-carboxybenzene-1-sulfonato-κ O1)bis(1,10-phenanthroline-κ2 N, N′)copper(II) 3-amino-4-carboxybenzene-1-sulfonate monohydrate, [Cu(C7H6N2O5S)(C12H8N2)2](C7H6N2O5S)·H2O, (1), and catena-poly[[diaquacopper(II)]-μ-3-amino-4-carboxylatobenzene-1-sulfonato-κ2 O4: O4′], [Cu(C7H6N2O5S)(H2O)2] n, (2). The products were characterized by FT-IR spectroscopy, thermogravimetric analysis (TGA), solid-state UV-Vis spectroscopy and single-crystal X-ray diffraction analysis, as well as by variable-temperature powder X-ray diffraction analysis (VT-PXRD). Intermolecular π-π stacking interactions in (1) link the mononuclear copper(II) cation units into a supramolecular polymeric chain, which is further extended into a supramolecular double chain through interchain hydrogen bonds. Supramolecular double chains are then extended into a two-dimensional supramolecular double layer through hydrogen bonds between the lattice Hasba− anions, H2O molecules and double chains. Left- and right-handed 21 helices formed by the Hasba− anions are arranged alternately within the two-dimensional supramolecular double layers. Complex (2) exhibits a polymeric chain which is further extended into a three-dimensional supramolecular network through interchain hydrogen bonds. Complex (1) shows a reversible dehydration-rehydration behaviour, while complex (2) shows an irreversible dehydration-rehydration behaviour.
- Subjects
COPPER; DEPOLYMERIZATION; METALS; POLYMERS; MACROMOLECULES; LIGANDS (Chemistry)
- Publication
Acta Crystallographica Section C: Structural Chemistry, 2015, Vol 71, Issue 7, p570
- ISSN
2053-2296
- Publication type
Article
- DOI
10.1107/S2053229615011432