A Water-Stable Dual-Channel Luminescence Sensor for UO2(2+) Ions Based on an Anionic Terbium(III) Metal-Organic Framework

A stable 3D Tb(III) -based metal-organic framework [fusion_builder_container hundred_percent=”yes” overflow=”visible”][fusion_builder_row][fusion_builder_column type=”1_1″ background_position=”left top” background_color=”” border_size=”” border_color=”” border_style=”solid” spacing=”yes” background_image=”” background_repeat=”no-repeat” padding=”” margin_top=”0px” margin_bottom=”0px” class=”” id=”” animation_type=”” animation_speed=”0.3″ animation_direction=”left” hide_on_mobile=”no” center_content=”no” min_height=”none”][Tb(BPDC)2 ]?(CH3 )2 NH2 (DUT-101) was synthesised, and it is the first efficient dual-channel luminescence sensor for aqueous UO2(2+) 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 UO2(2+) 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 UO2(2+) ions among various metal ions.

Authors: Ye J, Bogale RF, Shi Y, Chen Y, Liu X, Zhang S, Yang Y, Zhao J, Ning G. ;Full Source: Chemistry. 2017 Apr 27. doi: 10.1002/chem.201700713. [Epub ahead of print] ;[/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]