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A 3D Adenine‐based Cd‐MOF: Synthesis, Structure and Photoluminescent Sensing for an Aromatic Azo Compound
Author(s) -
Liu Yang,
Zhang ShiTing,
Wu YanBin,
Li Wei,
Yang YingQun
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000303
Subject(s) - photoluminescence , thiophene , luminescence , imidazole , molecule , quenching (fluorescence) , thermogravimetric analysis , chemistry , crystal structure , pyrimidine , single crystal , nucleobase , crystallography , materials science , fluorescence , photochemistry , stereochemistry , organic chemistry , optoelectronics , physics , quantum mechanics , dna , biochemistry
A new Cd‐MOF containing the nucleobase adenine and multicarboxylates, Cd 2 (tdc) 2 (1H‐ade) 2 (H 2 O) (H 2 tdc = 2,5‐thiophene carboxylic acid, 1H‐ade = adenine), was synthesized successfully under hydrothermal condition and characterized by single‐crystal X‐ray diffraction, infrared spectrum, thermogravimetric analysis and photoluminescence. The two crystallographically unsymmetrical Cd atoms are bridged by 2,5‐tdc ligands with (κ 1 ‐κ 1 )‐(κ 1 )‐μ 3 and (κ 1 –κ 1 )–μ 2 modes into two dimensional extended layers, which are further pillared with the neutral ade molecules to form a 3D frameworks stabilized by extensive π ··· π interactions between imidazole‐, pyrimidine‐ and thiophene‐rings. Inspection of the structure reveals that the architecture can be simplified as a 3,4,5‐ connected networks with a Schläfli symbol of (6 2 · 8)(4 2 · 6 3 · 8)(4 2 · 6 5 · 8 3 ). The photochemical property shows that the luminescent emission can be significantly quenched by aromatic azo compounds. The quenching effect coefficient ( K sv ) for bis(4‐imidazol‐1‐yl‐phenyl)diazene is determined to be 4.1 × 10 4 m –1 , indicating the title compound as a potential fluorescent sensing materials.