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Intramolecular charge transfer induced emission from triphenylamine-o-carborane dyads

机译:分子内电荷转移诱导的三苯胺- o -碳氢化合物二联体发射

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Two novel triphenylamine-o-carborane dyads with donor–acceptor architectures were designed and synthesized. The photophysical properties were thoroughly investigated. The results demonstrated that triphenylamine-o-carborane dyads presented locally excited (LE) emission and twisted intramolecular charge transfer (TICT) induced emission in various polar solvents, in which LE emission was not dependent on the solvent polarities and TICT emission was consistent with the solvent polarities. The solvent-dependent TICT emission with a large bathochromic shift exhibited a dramatic decrease in emissive efficiency with increasing the solvent polarity. More importantly, the triphenylamine-o-carborane dyads in solid states exhibited highly efficient ICT emissions, in which the ICT characteristics were confirmed by the experimental data and the density function theory (DFT) calculation results.
机译:设计并合成了两种具有供体-受体结构的新型三苯胺- o -碳氢化合物二联体。彻底研究了光物理性质。结果表明,三苯胺- o -碳氢化合物二元化合物在各种极性溶剂中均表现为局部激发(LE)发射和扭曲的分子内电荷转移(TICT)诱导发射,其中LE发射不依赖于溶剂极性TICT的发射与溶剂极性一致。具有大的红移的依赖溶剂的TICT发射随着溶剂极性的增加而显着降低了发射效率。更重要的是,固态的三苯胺- o -碳氢化合物二元化合物表现出高效的ICT排放,其中ICT特性已通过实验数据和密度函数理论(DFT)的计算结果得到证实。

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