Emission from Charge Recombination during the Pulse Radiolysis of Bis(diarylamino)dihydro-indenoindene Derivatives
Emission from Charge Recombination during the Pulse Radiolysis of Bis(diarylamino)dihydro-indenoindene Derivatives
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DOI：
10.1021/acs.jpcc.5b04823
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发表时间：
2015-07
影响因子：
3.7
通讯作者：
Chao Lu;M. Fujitsuka;S. Tojo;Wei-Jyun Wang;Yi Wei;T. Majima
中科院分区：
文献类型：
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作者：
Chao Lu;M. Fujitsuka;S. Tojo;Wei-Jyun Wang;Yi Wei;T. Majima
二氢茚并茚（DI）是一类新型的有机发光二极管和有机光致发光材料的有机化合物，（二芳氨基）基团（R-DI），包括双二（二苯基氨基）二氢茚并茚（二甲苯基氨基）二氢-茚并茚，和研究了咔唑基二氢茚并茚在溶剂中脉冲辐解过程中相应自由基阳离子（R-DI·+）的瞬态吸收，自由基阴离子（R-DI·-）和处于三重激发态的R-DI（3R-DI*）。结果表明，DI·+、DI·-和3DI* 可见光区的电子跃迁主要来源于DI的反式二苯乙烯骨架.随着二芳氨基取代基给电子能力的增强，R-DI·+、R-DI·-和3R-DI* 的吸收峰均发生红移。光谱观测和理论计算表明，正电荷主要集中在R-DI·+的三苯胺基团上，而负电荷则集中在R-DI·+的三苯胺基团上。
As a new series of compounds designed for organic light-emitting diodes and organic photovoltaics, dihydro-indenoindenes (DI) substituted by bis(diarylamino) groups (R-DI) including bis(diphenylamino)dihydro-indenoindene, bis(ditolylamino)dihydro-indenoindene, and bis(carbazolyl)dihydro-indenoindene were studied during the pulse radiolysis in solvents to measure the transient absorptions of the corresponding radical cations (R-DI•+), radical anions (R-DI•–), and R-DI in the triplet excited states (3R-DI*). It was clearly indicated that the origin of the electronic transitions in the visible region of DI•+, DI•–, and 3DI* is mainly attributed to the trans-stilbene skeleton of DI. With increasing the electron-donating ability of the diarylamino substituents, the absorption peaks of R-DI•+, R-DI•–, and 3R-DI* showed a red shift. The observed spectra and theoretical calculations suggested that the positive charge is mainly localized on the triphenylamine moiety of R-DI•+, whereas the negative charge is locali...