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Two new Cd II and Zn II coordination polymers incorporating 1‐aminobenzene‐3,4,5‐tricarboxylic acid: synthesis, crystal structure and characterization
Author(s) -
Shao Zhi-Chao,
Meng Xiang-Ru,
Hou Hong-Wei
Publication year - 2019
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/s2053229619009227
Subject(s) - crystal structure , crystallography , ligand (biochemistry) , tricarboxylic acid , chemistry , thermogravimetric analysis , polymer , coordination polymer , metal ions in aqueous solution , stereochemistry , infrared spectroscopy , ion , organic chemistry , citric acid cycle , biochemistry , enzyme , receptor
Aminobenzoic acid derivatives are widely used in the preparation of new coordination polymers since they contain O‐atom donors, as well as N‐atom donors, and have a rich variety of coordination modes which can lead to polymers with intriguing structures and interesting properties. Two new coordination polymers incorporating 1‐aminobenzene‐3,4,5‐tricarboxylic acid (H 3 abtc), namely, poly[(μ 3 ‐1‐amino‐5‐carboxybenzene‐3,4‐dicarboxylato)diaquacadmium(II)], [Cd(C 9 H 5 NO 6 )(H 2 O) 2 ] n , (I), and poly[[bis(μ 5 ‐1‐aminobenzene‐3,4,5‐tricarboxylato)triaquatrizinc(II)] dihydrate], {[Zn 3 (C 9 H 4 NO 6 ) 2 (H 2 O) 3 ]·2H 2 O} n , (II), have been prepared and structurally characterized by single‐crystal X‐ray diffraction. In polymer (I), each tridentate 1‐amino‐5‐carboxybenzene‐3,4‐dicarboxylate (Habtc 2− ) ligand coordinates to three Cd II ions to form a two‐dimensional network structure, in which all of the Cd II ions and Habtc 2− ligands are equivalent, respectively. Polymer (II) also exhibits a two‐dimensional network structure, in which three crystallographically independent Zn II ions are bridged by two crystallographically independent pentadentate 1‐aminobenzene‐3,4,5‐tricarboxylate (abtc 3− ) ligands. This indicates that changing the metal ion can influence the coordination mode of the H 3 abtc‐derived ligand and further influence the detailed architecture of the polymer. Moreover, the IR spectra, thermogravimetric analyses and fluorescence properties were investigated.