Effect of intramolecular charge transfer on the two-photon absorption behavior of multibranched triphenylamine derivations

被引：6
作者：
He, Xing [1 ]
Xu, Bin [2 ]
Liu, Yuqiang [1 ]
Yang, Yanqiang [1 ]
Tian, Wenjing [2 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China
[2] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 05期
基金：
中国国家自然科学基金;
关键词：
OPTICAL-DATA STORAGE; CROSS-SECTIONS; FLUORESCENCE; CHROMOPHORES; ENHANCEMENT; STATE;
D O I：
10.1063/1.3692076
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Solvent polarity effect on the absorption spectra and fluorescence spectra of a series of multibranched structure triphenylamine derivations (Ph-G0, Ph-G1, and Ph-G2) were analyzed to reveal the factors that determine the two-photon absorption (TPA) ability in these molecules. It was found that the dominate factor is the extent of intramolecular charge transfer upon photoexcitation, rather than coherent coupling between branches. This result suggests that it is more effective to change the electron withdrawing ability or electron giving ability of branches and core than simply increase the number of branches for enhancing the TPA ability in multibranched structure molecules. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3692076]
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页数：5
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