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AIE active triphenylamine–benzothiazole based motifs: ESIPT or ICT emission

机译：AIE活跃的三苯胺 - 苯并噻唑基ZOTIFS：ESIPT或ICT排放

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Two novel donor–π bridge–acceptor compounds containing excited state intramolecular proton transfer (ESIPT) and non-ESIPT units based on triphenylamine–benzothiazole were synthesized via Suzuki coupling reaction. Their photophysical properties were studied in the solid state as well as in solutions with solvents of different polarities. The fluorophores showed absorption in the UV region and emission in the visible region in both solutions and solid state. The optical properties of these compounds are highly dependent on solvent polarity. Significant positive solvatochromism (～30 nm absorption and ～80 nm emission red shift in polar solvents) were observed for both the compounds. Large Stokes shift (～15?000 cm ~(?1) ), polarity sensitive optical properties and very high quantum efficiencies (～90%) in solvents and the solid state are the striking features of the synthesized compounds. Intramolecular charge transfer (ICT) characteristics of the compounds were supported experimentally and computationally. Halochromism and the intermolecular charge transfer phenomenon were used for investigation of ESIPT emission for compound 9 over ICT emission.
机译：通过Suzuki偶联反应合成了含有激发态分子内质子转移（ESIPT）和基于三苯胺 - 苯并噻唑的非Esipt单元的新型供体-π桥接剂化合物。在固态中研究了它们的光物理性质，以及不同极性的溶剂的溶液中。荧光团在紫外区域和可见区域中的发射在溶液和固态中显示出的吸收。这些化合物的光学性质高度依赖于溶剂极性。对于两种化合物，观察到显着的阳性溶液（〜30nm吸收和〜80nm的发射红换档）。大型斯托克斯偏移（〜15？000cm〜（α1）），极性敏感光学性质和溶剂中的非常高的量子效率（〜90％）和固态是合成化合物的醒目特征。实验和计算支持化合物的分子内电荷转移（ICT）特征。虎体萎缩和分子间电荷转移现象用于对化合物9过度发射的化合物9的研究。

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