An exceptionally stable luminescent cadmium() metal-organic framework as a dual-functional chemosensor for detecting Cr() anions and nitro-containing antibiotics in aqueous media

• Published in: CrystEngComm Vol. 23; no. 5; pp. 1218 - 1225
• Main Authors: Fan, Liming, Zhao, Dongsheng, Li, Bei, Chen, Xi, Wang, Feng, Deng, Yuxin, Niu, Yulan, Zhang, Xiutang
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 09.02.2021
• Subjects: Anions; Antibiotics; Aqueous solutions; Cadmium; Chemical sensors; Chemoreceptors; Chromium; Crystallography; Electron transfer; Fluorescence; Luminescence; Luminescence quenching; Metal-organic frameworks; Recyclability
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/d0ce01721c

Based on four kinds of binuclear cadmium-carboxyl SBUs and two independent cadmium cations, a robust metal-organic framework, with the formula {[Cd 10 (DDB) 4 (bpz) 8 (DMA)(H 2 O) 8.2 ]·2H 2 O} n ( 1 ), was successfully fabricated under solvothermal conditions. Benefitting from the excellent moisture susceptibility as well as luminescence property, 1 exhibits highly sensitive detectability as a dual-response chemosensor for Cr( vi ) anions and broad-spectrum nitro-containing antibiotics in aqueous media through luminescence quenching, with excellent recyclability and low detection limits. Moreover, the fluorescence recognition mechanisms were explored from both internal filter effect (IFE) and photo-induced electron transfer (PET) viewpoints. Based on four kinds of SBUs, a robust Cd( ii ) LMOF was fabricated that possessed highly sensitive detectability as a dual-response chemosensor for Cr( vi ) anions and broad-spectrum nitro-containing antibiotics in aqueous media.