Two coordination polymers as multi-responsive luminescent sensors for the detection of UO, Cr(), and the NFT antibiotic

• Published in: CrystEngComm 2022-09, Vol.24 (36), p.6376-6384
• Main Authors: Xue, Yun-Shan, Sun, Dan-Ling, Lv, Jun-Qing, Li, Shi-Juan, Chen, Xuan-Rong, Cheng, Wei-Wei, Wu, Hong-Xiu, Wang, Jun
• Format: Article
• ISSN: 1466-8033
• DOI: 10.1039/d2ce00631f

Two coordination polymers, namely {[Cd 3 (TIYM) 2 (5-SASS) 2 (H 2 O) 2 ]·H 2 O} n ( 1 ) and {[Zn 2 (TIYM)(5-SASS)(μ 2 -OH)]·5H 2 O} n ( 2 ), were assembled using a mixed ligand strategy with the semi-rigid linker tetrakis(imidazol-1-ylmethyl)methane (TIYM) and 5-sulfoisophthalic acid sodium salt (5-SASS). Luminescence studies reveal that compounds 1 and 2 show strong fluorescence and exhibit efficient luminescence quenching in detecting UO 2 2+ cations, Cr 2 O 7 2− /CrO 4 2− anions, and the NFT antibiotic in aqueous media, and can thus serve as promising sensors. The detection limits of compounds 1-2 are 1.96 × 10 −4 /1.36 × 10 −4 M for UO 2 2+ cations, 6.53 × 10 −5 /5.41 × 10 −5 M for Cr 2 O 7 2− anions, 2.29 × 10 −4 /1.04 × 10 −4 M for CrO 4 2− anions, and 5.62 × 10 −5 /4.74 × 10 −5 M for the NFT antibiotic, respectively, indicating that the two CPs are promising multi-functional luminescent sensors. Additionally, the possible mechanisms for luminescence quenching have been investigated using spectral overlap experiments and DFT calculations. Two CPs have been synthesized using solvothermal method and can act as multi-responsive luminescent probe to detect UO 2 2+ cation, Cr 2 O 7 2− /CrO 4 2− anions, and nitrofuran antibiotic in aqueous media with high sensitivity and selectivity.