Hits:

Indexed by:期刊论文

Date of Publication:2017-06-07

Journal:CHEMISTRY-A EUROPEAN JOURNAL

Included Journals:SCIE、EI、PubMed

Volume:23

Issue:32

Page Number:7657-7662

ISSN No.:0947-6539

Key Words:crystal structure; luminescence; metal-organic framework; quenching; uranyl ions

Abstract:A stable 3D Tb-III-based metal-organic framework [Tb(BPDC)(2)]center dot(CH3)(2)NH2 (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.