Fluorescent conjugated microporous polymer based on perylene tetraanhydride bisimide for sensing o-nitrophenol

A novel conjugated microporous polymer based on perylene tetraanhydride bisimide (DP(2)A(2)) has been synthesized through Sonogashira-Hagihara cross-coupling polymerization of tetrabromo-substituted perylene tetraanhydride bisimide derivative (DPBr(2)ABr(2)) with 1,4-diethynylbenzene, whose Brunauer-Emmett-Teller (BET) specific surface area is about 378 m(2) g(-1). The fluorescence quenching behaviors of the DP(2)A(2) were investigated. It is found that the DP(2)A(2) shows high sensitivity and selectivity to tracing o-nitrophenol (o-NP) in THE with Ks(v) constant of 2.00 x 10(4) L mol(-1). The detection limit (LOD) is 1.50 x 10(-9) mol L--(1). The possible sensing mechanism for the luminescent quenching of DP(2)A(2) towards o-NP exciting at 365 nm was considered the donor-acceptor electron transfer mechanism, which is a combined result from both dynamic (collisional) and static quenching. Moreover, the static quenching process is dominant for DP(2)A(2). (C) 2018 Elsevier B.V. All rights reserved.