Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1653.doi: 10.7503/cjcu20200077

• Physical Chemistry • Previous Articles     Next Articles

Theoretical Studies of Triphenyl-s-triazine Groups Regulating Photoelectric Properties of Sensitizing Dyes

WANG Linshuo,LI Kunjie*(),LIU Yumin,ZHAO Ruihong,LI Qing,QIAN Xin,ZHANG Fan,XUE Zhiwei   

  1. College of Chemical & Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
  • Received:2020-02-17 Online:2020-07-10 Published:2020-05-20
  • Contact: Kunjie LI E-mail:15830158860@163.com
  • Supported by:
    † Natural Science Foundation of Hebei Province, China(B2016208082);University Science and Technology Research Excellent Youth Foundation of Hebei Province, China(YQ2014015)

Abstract:

By adding the 2,4,6-triphenyl-s-triazine group into the donor-acceptor-π-acceptor(D-A-π-A) configuration sensitizer, seven kinds of new sensitizers were designed. Then the methods of density functional theory(DFT) and time-dependent density functional theory(TD-DFT) were used to study the geometric con-figuration, front-line orbital energy levels, absorption spectral, excitation energy, intramolecular charge transport and other related properties. The results indicate that the 2,4,6-triphenyl-s-triazine group can effectively improve the performance of dyes, which using triphenylamine as electron donors. The dye HBL2, which attaching triphenylamine to both sides of 2,4,6-triphenyl-s-triazine, has lower band gap and higher light harvesting efficiency(LHE). The electron transfer results of the dye HBL2 analysed by the Multiwfn show that 2,4,6-triphenyl-s-triazine not only acts as electronic push-pull effect, but also acts as a donor under certain conditions. So it can promote the intramolecular charge transfer.

Key words: 2,4,6-Triphenyl-s-triazine, Triphenylamine, Donor-acceptor-π-acceptor(D-A-π-A), Intramolecular charge transfer

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