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A Highly Efficient Coordination Polymer for Selective Trapping and Sensing of Perrhenate/Pertechnetate

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journal contribution
posted on 2020-03-17, 19:44 authored by Cheng-Peng Li, Hang Zhou, Jing Chen, Jia-Jun Wang, Miao Du, Wuzong Zhou
A porous cationic Ag­(I) coordination polymer, [Ag­(1,2,4,5-p4b)]­(SbF6) (TJNU-302) with the ligand 1,2,4,5-p4b (1,2,4,5-tetra­(pyridin-4-yl)­benzene), is reported that shows high sorption capacity (211 mg g–1) and distribution coefficient Kd (5.8 × 105 mL g–1) as well as outstanding selectivity in 500 times excess of CO32– or PO43– anion for perrhenate removal. TJNU-302 can act as a crystalline turn-off sensor for perrhenate upon UV radiation. In this way, a test paper strip for sensing ReO4 could be produced. In water solution, TJNU-302 shows an efficient fluorescence quenching response to ReO4 ion, with the highest quenching percentage (86%) among all reported ReO4 sensors. These results could be elucidated by the bonding properties of single-crystal structures of TJNU-302 before and after perrhenate sorption, as well as density functional theory (DFT) calculations.