1. Multiresponsive luminescent sensing behaviour of a tetraimidazole ligand and its 3D Cd(II) metal–organic frameworks.
- Author
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Wu, Ye-Feng, Cheng, Jia-Jun, Jiang, Tao, Ma, Yu-Chen, Kou, Jia-Lei, Cheng, Guo-Feng, Hu, Xiu-Li, Tang, Xiao-Yan, Ma, Yun-Sheng, Yin, Wen-Yu, and Cheng, Hong-Jian
- Subjects
LIGANDS (Chemistry) ,SINGLE crystals ,AQUEOUS solutions ,ANIONS ,CATIONS ,COORDINATION polymers - Abstract
The detection of excess toxic anions or cations in an aqueous solution through various fluorescent materials such as organic or inorganic fluorescent materials has aroused significant interest recently. Herein, a new tetraimidazole ligand 1,3-bis(1-imidazolyl)-5-[3,5-bis(1-imidazolyl)-phenoxymethyl]-benzene (timpb) and its two Cd(II) metal–organic frameworks {[Cd
2 (1,4-bdc)2 (timpb)]·5.5(H2 O)}n (1) (1,4-benzenedicarboxylic acid = 1,4-H2 bdc) and {[Cd2 (4,4′-bpdb)2 (timpb)]·(MeCN)·2.5(H2 O)}n (2) (4,4′-biphenyldicarboxylic acid = 4,4′-H2 bpdb) were synthesized. Through X-ray single crystal diffraction analysis, 1 can be considered as a 2-fold interpenetrating pillared-bilayer framework formed by linking [Cd2 (1,4-bdc)4 ]n layers with pairs of timpb ligands, whereas 2 exhibits a 2-fold interpenetrating 3D honeycombed framework formed by linking [Cd(4,4′-bpdb)]n chains with timpb ligands. The solid-state luminescent properties of timpb, 1 and 2 at ambient temperature were also investigated. Moreover, timpb acted as a potential luminescent sensor for the detection of cations Fe3+ or Cu2+ and the anion Cr2 O7 2− , whereas 1 displayed high sensitivity toward the cation Fe3+ and anion Cr2 O7 2− . [ABSTRACT FROM AUTHOR]- Published
- 2024
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