Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor--Acceptor Chromophore
文献类型：期刊论文
| 作者 | Hu, Jiangpu1; Li, Yang1; Zhu, Huaning1; Qiu, Shuhai2; He, Guiying1; Zhu, Xiaozhang2; Xia, Andong1 |
| 刊名 | CHEMPHYSCHEM
 |
| 出版日期 | 2015-08-03 |
| 卷号 | 16期号:11页码:2357-2365 |
| 关键词 | donor-pi-acceptor charge transfer reaction mechanisms solvation solvatochromism |
| 英文摘要 | The photophysical properties of intramolecular charge transfer (ICT) in a novel tribranched donor--acceptor chromophore, triphenoxazine-2,4,6-triphenyl-1,3,5-triazine (tri-PXZ-TRZ), with thermally activated delayed fluorescence character was investigated in different aprotic solvents by steady-state spectroscopy and femtosecond and nanosecond transient absorption spectroscopy measurements. Increasing the solvent polarity led to a significant increase in the Stokes shift. The large Stokes shift in highly polar solvents was attributed to ICT properties upon excitation; this resulted in a strong interaction between the tri-PXZ-TRZ molecule and the surrounding solvent, which led to a strong solvation process. Quantum-chemical calculations and changes in the dipole moment showed that this compound has a large degree of ICT. Furthermore, an apolar environment helped to preserve the symmetry of tri-PXZ-TRZ and to enhance its emission efficiency. The femtosecond and nanosecond transient absorption spectroscopy results indicated that the excited-state dynamics of this push-pull molecule were strongly influenced by solvent polarity through the formation of a solvent-stabilized ICT state. The excited-state relaxation mechanism of tri-PXZ-TRZ was proposed by performing target model analysis on the femtosecond transient absorption spectra. In addition, the delayed fluorescence of tri-PXZ-TRZ was significantly modulated by a potential competition between solvation and intersystem crossing processes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-10-27 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/27753]  |
| 专题 | 化学研究所_分子反应动力学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Jiangpu,Li, Yang,Zhu, Huaning,et al. Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor--Acceptor Chromophore[J]. CHEMPHYSCHEM,2015,16(11):2357-2365. |
| APA | Hu, Jiangpu.,Li, Yang.,Zhu, Huaning.,Qiu, Shuhai.,He, Guiying.,...&Xia, Andong.(2015).Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor--Acceptor Chromophore.CHEMPHYSCHEM,16(11),2357-2365. |
| MLA | Hu, Jiangpu,et al."Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor--Acceptor Chromophore".CHEMPHYSCHEM 16.11(2015):2357-2365. |
入库方式： OAI收割
来源：化学研究所
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