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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
Author(s) -
Wang LiBo,
Zhang Wenfei,
Shen Shaosong,
Wang Huigang,
Zheng Xuming,
Zheng Anmin,
Chu Yueying
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4067
Subject(s) - raman spectroscopy , resonance (particle physics) , excited state , chemistry , spectroscopy , relaxation (psychology) , resonance raman spectroscopy , excitation , spectral line , molecular physics , coherent anti stokes raman spectroscopy , nuclear magnetic resonance , atomic physics , raman scattering , optics , physics , psychology , social psychology , quantum mechanics , astronomy
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 (S 0 →S 4 ) photo relaxation dynamics have substantial difference from that of B band (S 0 →S 10 ) . The overall picture of short‐time dynamics and the vibronic coupling mechanisms are interpreted using Albrecht's theory. Copyright © 2012 John Wiley & Sons, Ltd.