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Probing ultrafast excited state dynamics and nonlinear absorption properties of three star-shaped conjugated oligomers with 1,3,5-triazine core
Wang, Yaochuan1; Yin, Shuhui1; Liu, Jianyong2; Yao, Li1; Wang, Guiqiu1; Liu, Dajun1; Jing, Bo1; Cheng, Lihong1; Zhong, Haiyang1; Shi, Xiaorong3; Fang, Qiang4; Qian, Shixiong5
刊名RSC ADVANCES
2014
DOI10.1039/c3ra45544k
4期:21页:10960-10967
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]OPTICAL-LIMITING PROPERTIES ; 2-PHOTON ABSORPTION ; SPECTRAL PROPERTIES ; CROSS-SECTION ; MAIN-CHAIN ; FLUORESCENCE ; DYE ; MOLECULES ; EXCITATION ; POLYMERS
英文摘要The effects of different bridging fluorene units on the two-photon absorption (TPA) properties and ultrafast response of organic conjugated oligomers were investigated for three star-shaped oligomers named TFT-1, TFT-2 and TFT-3. These three oligomers are composed of the same central core 1,3,5-triazine, with three arms that consist of specific numbers of bridging fluorene groups and with triphenylamine as electron-donating group at the terminal end of each arm. The studies on these oligomers were carried out by using two-photon excited fluorescence (TPF), degenerate pump-probe techniques, transient absorption spectroscopy and time-resolved photoluminescence (TRPL) methods. The TPA cross-sections were determined to be 1509 GM, 1260 GM and 789 GM for TFT-1, TFT-2 and TFT-3, respectively, decreasing with the increase of bridging fluorene number. Ultrafast dynamics results show that there is a fast intramolecular charge transfer (ICT) formation time of about several ps and a relatively long decay process of the ICT state. The formation time of ICT was found to increase from TFT-1 (1.9 ps), to TFT-2 (3.0 ps) and TFT-3 (6.3 ps), with the increased number of the fluorene bridge, which may explain the action of fluorene bridge on the electron transmission properties, the ICT properties and the TPA behavior.
语种英语
WOS记录号WOS:000332061900064
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145809
专题中国科学院大连化学物理研究所
作者单位1.Dalian Maritime Univ, Dept Phys, Dalian 110626, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 110626, Peoples R China
3.SIPO, Patent Off, Beijing Patent Examinat Cooperat Ctr, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Organ Chem, Lab Polymer Mat, Shanghai 200032, Peoples R China
5.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
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GB/T 7714
Wang, Yaochuan,Yin, Shuhui,Liu, Jianyong,et al. Probing ultrafast excited state dynamics and nonlinear absorption properties of three star-shaped conjugated oligomers with 1,3,5-triazine core[J]. RSC ADVANCES,2014,4(21):10960-10967.
APA Wang, Yaochuan.,Yin, Shuhui.,Liu, Jianyong.,Yao, Li.,Wang, Guiqiu.,...&Qian, Shixiong.(2014).Probing ultrafast excited state dynamics and nonlinear absorption properties of three star-shaped conjugated oligomers with 1,3,5-triazine core.RSC ADVANCES,4(21),10960-10967.
MLA Wang, Yaochuan,et al."Probing ultrafast excited state dynamics and nonlinear absorption properties of three star-shaped conjugated oligomers with 1,3,5-triazine core".RSC ADVANCES 4.21(2014):10960-10967.
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