3 years ago

A Water-Stable Dual-Channel Luminescence Sensor for UO22+ Ions Based on an Anionic Terbium(III) Metal–Organic Framework

A Water-Stable Dual-Channel Luminescence Sensor for UO22+ Ions Based on an Anionic Terbium(III) Metal–Organic Framework
Siqi Zhang, Yanzhen Chen, Xigang Liu, Yaoyao Yang, Junwei Ye, Guiling Ning, Raji F. Bogale, Yangwei Shi, Jianzhang Zhao
A stable 3D TbIII-based metal–organic framework [Tb(BPDC)2]⋅(CH3)2NH2 (DUT-101) was synthesized, and it is the first efficient dual-channel luminescence sensor for aqueous UO22+ ions. DUT-101 contains an anionic three-dimensional framework and protonated dimethylamine molecules embedded within the channels. The intense green emission of DUT-101 could be highly selectively and sensitively quenched by UO22+ ions even in the presence of other competing metal ions. A possible sensing mechanism was proposed based on both suppression of luminescence resonance energy transfer and enhancement of intermolecular electron transfer. Furthermore, visual green fluorescent test papers based on DUT-101 were fabricated and could be used to discriminate UO22+ ions among various metal ions. Watching out for uranium: A water-stable 3D TbIII-based metal–organic framework is synthesized, and it is the first efficient dual-channel response luminescence sensor for aqueous UO22+ ions. The intense green emission of DUT-101 can be highly selectively and sensitively quenched by UO22+ ions even in the presence of other competing metal ions.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700713

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