The excited state dynamics study of di-2-pyridylketone in the A-band and B-band absorptions by using resonance Raman spectroscopy, IR and UV–visible spectroscopy

Authors

  • LiBo Wang,

    1. Engineering Research Center for Eco-dyeing and Finishing of Textiles, MOE, Zhejiang Sci-Tech University, and State Key Laboratory of advanced Textiles Materials and Manufacture Technology, MOE, Zhejiang Sci-Tech University, Hangzhou, China
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  • Wenfei Zhang,

    1. Engineering Research Center for Eco-dyeing and Finishing of Textiles, MOE, Zhejiang Sci-Tech University, and State Key Laboratory of advanced Textiles Materials and Manufacture Technology, MOE, Zhejiang Sci-Tech University, Hangzhou, China
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  • Shaosong Shen,

    1. School of Environmental Engineering, Anhui University of Architecture, Anhui, China
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  • Huigang Wang,

    Corresponding author
    1. Department of Physics, University of Osnabrueck, Osnabrueck, Germany
    • Engineering Research Center for Eco-dyeing and Finishing of Textiles, MOE, Zhejiang Sci-Tech University, and State Key Laboratory of advanced Textiles Materials and Manufacture Technology, MOE, Zhejiang Sci-Tech University, Hangzhou, China
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  • Xuming Zheng,

    1. Engineering Research Center for Eco-dyeing and Finishing of Textiles, MOE, Zhejiang Sci-Tech University, and State Key Laboratory of advanced Textiles Materials and Manufacture Technology, MOE, Zhejiang Sci-Tech University, Hangzhou, China
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  • Anmin Zheng,

    1. Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan, China
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    • **Anmin Zheng, Wuhan institute of Physics and Mathematics, the Chinese Academy of Sciences. E-mail: zhenganm@wipm.ac.cn
  • Yueying Chu

    1. Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan, China
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Huigang Wang, Department of Chemistry Zhejiang Sci-Tech University, Hangzhou, 310018, China. E-mail: zdwhg@163.com

Abstract

Excitation wavelengths of 282.4, 273.9 (A band), 252.7, 239.5 and 228.7 nm (B band) resonance Raman spectra were acquired for di-2-pyridylketone, and density functional calculations were carried out to help in the elucidation of the photo relaxation dynamics of A-band and B-band electronic transitions. The resonance Raman spectra show that the intensity pattern of the A band presents great difference from that of the B band, which indicate that the short-time A-band (S0→S4) photo relaxation dynamics have substantial difference from that of B band (S0→S10) . The overall picture of short-time dynamics and the vibronic coupling mechanisms are interpreted using Albrecht's theory. Copyright © 2012 John Wiley & Sons, Ltd.

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