Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-06-07

Journal: CHEMISTRY-A EUROPEAN JOURNAL

Included Journals: PubMed、EI、SCIE

Volume: 23

Issue: 32

Page Number: 7657-7662

ISSN: 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.