Fluorescent Zn(II) frameworks with multicarboxylate and pyridyl N-donor ligands for sensing specific anions and organic molecules

Shu-Man Zhao; Zhao-Feng Qiu; Zou-Hong Xu; Zi-Qing Huang; Yue Zhao; Wei-Yin Sun

doi:10.1039/d1dt04052a

Fluorescent Zn(II) frameworks with multicarboxylate and pyridyl N-donor ligands for sensing specific anions and organic molecules

Dalton Trans. 2022 Mar 1;51(9):3572-3580. doi: 10.1039/d1dt04052a.

Authors

Shu-Man Zhao¹, Zhao-Feng Qiu², Zou-Hong Xu¹, Zi-Qing Huang¹, Yue Zhao¹, Wei-Yin Sun¹

Affiliations

¹ Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, China. sunwy@nju.edu.cn.
² College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China.

PMID: 35144276
DOI: 10.1039/d1dt04052a

Abstract

Three novel fluorescent Zn(II) frameworks, namely [Zn(DPA)(NDA)]₂·2DMF (1), [Zn₂(DPA)(OBA)₂]·2DMF·4H₂O (2) and [Zn(DPA)(HNTB)]·H₂O (3) (DPA = 2,5-di(pyridin-4-yl)aniline, H₂NDA = 1,4-naphthalenedicarboxylic acid, H₂OBA = 4,4'-oxydibenzoic acid, H₃NTB = 4,4',4''-nitrilotribenzoic acid, DMF = N,N-dimethylformamide), were successfully fabricated and structurally characterized. Due to the variety of organic linkers, 1-3 exhibit varied topologies: 1 is a 4-c three-dimensional (3D) framework with {6⁵·8} topology, 2 is a 6-c 3D net with point symbol of {4⁴·6¹⁰·8}, and 3 is a 4-c two-dimensional network that further stacks into a 3D structure by hydrogen bonding interactions with {4⁴·6²} topology. Experiments related to fluorescence show that 1-3 can be utilized to quickly identify specific anions of CrO₄^2-/Cr₂O₇^2-, and organic molecules such as 2,4,6-trinitrophenol and benzaldehyde.