Charge Transfer Emission of T-Shaped π-Conjugated Molecules: Impact of Quinoid Character on the Excited State Properties
Charge Transfer Emission of T-Shaped π-Conjugated Molecules: Impact of Quinoid Character on the Excited State Properties
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T 形 π 共轭分子的电荷转移发射：醌型特征对激发态性质的影响
DOI：
10.1021/jp501225j
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发表时间：
2014
期刊：
影响因子：
2.9
通讯作者：
T. Kawai
中科院分区：
文献类型：
--
作者：
T. Inouchi;T. Nakashima;T. Kawai
研究了π共轭体系的类醌性质对t形交叉共轭分子发射性质的影响。将苯并噻吩、2-苯基噻吩和2-苯基噻吩[3,2-b]噻吩这3个具有不同类喹啉性质的π共轭体系正交连接到一个具有酸反应性的双（苯乙基）芳烯上。垂直π系的类醌特性的增强有效地抑制了分子内电荷转移（TICT）的扭曲发射，使得ICT态更加平面，发射强度增强，Stokes位移缩短。
We investigate the impact of quinoid character of a π-conjugation system on the emission properties of T-shaped cross-conjugated molecules. Three π-conjugated systems with different quinoid nature including benzothiophene, 2-phenylthiophene, and 2-phenylthieno[3,2-b]thiophene were connected orthogonally to a π-conjugated bis(phenylethynyl)arylene with an acid responsiveN-methylbenzimidazole junction. The enhancement of quinoid character of a vertical π-system effectively suppressed the twisted intramolecular charge transfer (TICT) emission, leading to a more planar ICT state with enhanced emission intensity as well as a shortened Stokes shift.