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文献[1]报道N-甲基-N-(2-甲基丙烯酰氧乙基)苯胺(MEMA)单体,由于同一分子中含有缺电子碳碳双键和给电子发色基团(芳叔胺氮上孤对电子),因此当链节克分子浓度相等时,单体的荧光强度要比其均聚物的荧光强度低得多,归之为单体“结构自猝灭”所致。这是由于共存在单体分子中的吸电子双键基团和给电子的荧光基团在光照下于分子内或分子间产生激基复合物所致。这种现象称为“结构自猝灭现象”。聚合物无双键存在,因而其荧光强度比单体高得多。
The literature [1] reported N-methyl-N- (2-methacryloyloxyethyl) aniline (MEMA) monomer, due to the same molecule containing electron-deficient carbon-carbon double bond and to the electronic chromophore Tertiary amine nitrogen on the lone pair of electrons), so when the molecular chain molecules with the same concentration, the fluorescence intensity of the monomer than its homopolymer fluorescence intensity is much lower, due to the monomer “structure self-quenching” due . This is due to the coexistence of electron-withdrawing double bond groups in the monomeric molecule and electron-donating fluorescent groups that generate exciplexes in or between molecules in the light. This phenomenon is called “self-quenching phenomenon”. Polymer double bonds exist, so its fluorescence intensity is much higher than the monomer.