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不含普通发光单元的非典型生色团发光化合物因其基础研究重要性和广泛的应用前景引起了人们的极大兴趣.其中许多化合物还具有独特的聚集诱导发光(Aggregation-induced emission,AIE)特性.然而其发光机理仍然存在争议.在此前的研究中,提出了簇聚诱导发光(clustering-triggered emission,CTE)机理,即非典型生色团的簇聚和电子共享来解释这些体系的发光和AIE现象.为进一步验证这一假说,设计合成了不含传统生色团的聚甲基丙烯酸(N-羟基琥珀酰亚胺)酯(PNHSMA).其稀溶液基本不发光,但浓溶液,纳米聚集体,固体粉末均发射蓝光,呈现出AIE性质.通过与其单体甲基丙烯酸(N-羟基琥珀酰亚胺)酯(NHSMA)的发光行为对比及单体单晶结构解析,利用CTE机理很好地解释了其光物理行为.
Atypical chromophore luminescent compounds that do not contain common luminescent units have drawn great interest due to their importance in basic research and their broad application prospects. Many of these compounds also have unique aggregation-induced emission (AIE) However, its luminescence mechanism remains controversial.In the previous study, clustering-triggered emission (CTE) mechanisms were proposed, ie the clustering and electron sharing of atypical chromophores to explain the luminescence of these systems And AIE phenomenon.In order to further verify this hypothesis, poly (N-hydroxysuccinimide) ester (PNHSMA) without traditional chromophore was designed and synthesized.The dilute solution was almost non-luminescent, but the concentrated solution, Nano-aggregates and solid powders all emit blue light, showing AIE properties.Compared with the light-emitting behavior of its monomer NHSMA and the single crystal structure analysis, the CTE mechanism Well explained its photophysical behavior.