Publication Date:
2015-06-16
Description:
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 (H 2 asba) 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 O 1 )bis(1,10-phenanthroline-κ 2 N , N ′)copper(II) 3-amino-4-carboxybenzene-1-sulfonate monohydrate, [Cu(C 7 H 6 N 2 O 5 S)(C 12 H 8 N 2 ) 2 ](C 7 H 6 N 2 O 5 S)·H 2 O, (1), and catena -poly[[diaquacopper(II)]-μ-3-amino-4-carboxylatobenzene-1-sulfonato-κ 2 O 4 : O 4′ ], [Cu(C 7 H 6 N 2 O 5 S)(H 2 O) 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, H 2 O molecules and double chains. Left- and right-handed 2 1 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.
Print ISSN:
0108-2701
Electronic ISSN:
1600-5759
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Permalink
