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A new two‐dimensional extended adenine and thiophenecarboxylate mixed‐ligand zinc(II) complex: synthesis, structure, thermostability and luminescent properties
Author(s) -
Liu Yang,
Feng YongLan,
Fu WeiWei
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/s2053229615021221
Subject(s) - photoluminescence , luminescence , thermostability , zinc , crystal structure , ligand (biochemistry) , metal ions in aqueous solution , materials science , chemistry , crystallography , metal organic framework , metal , optoelectronics , organic chemistry , biochemistry , receptor , adsorption , enzyme
The design and preparation of crystalline polymeric materials has attracted increasing attention due to their diverse applications as functional materials in gas storage, separation, catalysis, sensing and photoluminescence. The judicious selection of organic linkers is critical for varying the coordination behaviour of the metal ions and determining the overall characteristics of the networks. A new adenine‐based Zn II coordination polymer, [Zn(C 6 H 2 O 4 S)(C 5 H 5 N 5 )] n or [Zn(tdc)(9H‐ade)] (H 2 tdc is thiophene‐2,5‐dicarboxylic acid and ade is adenine), has been prepared hydrothermally and the crystal structure exhibits in its packing two‐dimensional (4,4) grid sheets parallel to the ab plane, featuring two distinct square cavities delimited by the two types of ligands and the Zn II ions with the dimensions 6.6 × 6.6 and 10.2 × 10.2 Å (based on the Zn...Zn distance). The title complex shows enhanced photoluminescence at 378 nm compared to the free ligands, suggesting that the coordination of H 2 tdc or adenine to the metal centre effectively increases the rigidity of the ligands and reduces the energy loss by radiative decay of intraligand excited states.