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Synthesis, structure and characterization of two copper(II) supramolecular coordination polymers based on a multifunctional ligand 2‐amino‐4‐sulfobenzoic acid
Author(s) -
Wei Yan,
Zhang Lei,
Wang MengJie,
Chen SiChun,
Wang ZiHao,
Zhang KouLin
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615011432
Subject(s) - supramolecular chemistry , copper , ligand (biochemistry) , characterization (materials science) , polymer , coordination polymer , coordination complex , supramolecular polymers , chemistry , combinatorial chemistry , polymer chemistry , materials science , nanotechnology , crystal structure , crystallography , metal , organic chemistry , biochemistry , receptor
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.