Preparation Of Conjugated Microporous Polymers With Benzoquinone And Perylene Groups And Their Fluorescence And Sensing Properties

Benzoquinone conjugated microporous/mesoporous polymers were synthesized by solution polymerization of DBQP and microemulsion polymerization of DBQN.The specific surface areas of these polymers are 356 and 25 m²g^-1,respectively.The average pore size of these polymers is about 2.12 nm and 3.84 nm,respectively.Two-dimensional p-conjugated polymer framework can be combined with permanent microporous/mesoporous,luminescent properties and rich oxygen atoms in the skeleton.Fluorescence studies show that DBQP and DBQN can be used as fluorescent chemical sensors for picric acid in acetone suspension.A new conjugated microporous polymer based on tetraenetetrasilyl anhydride disilamine DP2A2)was synthesized by acousto-optic cross-coupling polymerization.It was cross-coupled with tetrabromo-substituted tetraenetetracarboxylic anhydride diacetamide derivative?DPBr₂ABr₂?.Its specific surface area was about 378m²g^-1.The fluorescence quenching behavior of DP₂A₂ was studied.It is found that DP₂A₂ has a higher sensitivity and selectivity to trace nitrobenzene in thf with a Ksv constant of 2.00×10⁴ Lmol^-1.The possible sensing mechanism of luminescence quenching of DP₂A₂ excited from 1.50×10^-9mol L^-1.DP₂A₂to 365nm is considered to be a mechanism of electron transfer to the receptor.