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A three‐dimensional zinc‐based coordination polymer built from 5‐carboxylato‐1‐carboxylatomethyl‐2‐oxidopyridinium with a 4‐connected sra topology
Author(s) -
Ma DeYun,
Zheng Jing,
Cao JieQiong,
Lin XuMin,
Ling YouBiao
Publication year - 2014
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/s2053229614016829
Subject(s) - carboxylate , denticity , crystallography , zinc , chemistry , zigzag , topology (electrical circuits) , atom (system on chip) , ligand (biochemistry) , luminescence , hydrothermal circulation , stereochemistry , materials science , crystal structure , geometry , combinatorics , organic chemistry , biochemistry , mathematics , receptor , optoelectronics , seismology , computer science , embedded system , geology
A novel three‐dimensional Zn II complex, poly[aqua(μ 4 ‐5‐carboxylato‐1‐carboxylatomethyl‐2‐oxidopyridinium)zinc(II)], [Zn(C 8 H 5 NO 4 )(H 2 O)] n , has been prepared by hydrothermal assembly of Zn(CH 3 COO) 2 ·2H 2 O and 5‐carboxy‐1‐(carboxymethyl)pyridin‐1‐ium‐2‐olate (H 2 ccop). The ccop 2− anions bridge the Zn II cations in a head‐to‐tail fashion via monodentate aromatic carboxylate and phenolate O atoms to form an extended zigzag chain which runs parallel to the [011] direction. One O atom of the aliphatic carboxylate group of the ccop 2− ligand coordinates to the Zn II atom of a neighbouring chain thereby producing undulating layers which lie parallel to the (01) plane. A similar parallel undulating planar structure can be obtained if a path involving the other O atom of the aliphatic carboxylate group is considered. Thus, the aliphatic carboxylate group acts in a bridging bidentate mode to give extended –Zn–O–C–O–Zn– sequences running parallel to [001] which link the layers into an overall three‐dimensional framework. The three‐dimensional framework can be simplified as a 4‐connected sra topology with a Schläfli symbol of 4 2 .6 3 .8 if all the Zn II centres and ccop 2− anions are regarded as tetrahedral 4‐connected nodes. The three‐dimensional luminescence spectrum was measured at room temperature with excitation and emission wavelengths of 344–354 and 360–630 nm, respectively, at intervals of 0.15 and 2 nm, respectively.