Vibronic activity in the two-photon spectrum of pyrimidine |
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| Affiliation: | 1. Department of Physics, Aditanar College of Arts and Science, Tiruchendur 628216, India;2. Physics Research Centre, S.T. Hindu College, Nagercoil, Tamilnadu 629003, India;1. Department of Physics, Madras Christian College, Chennai, 600 059, India;2. Department of Chemistry, Madras Christian College, Chennai, 600 059, India;3. Department of Physics, Bakthavatchalam College, Chennai, 600 080, India;4. Department of Physics, Queen Mary''s College, Chennai, 600 004, India;1. Department of Pediatric Surgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India;2. Department of Neonatology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India |
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| Abstract: | The vibronic activity revealed by the TPE spectrum of pyrimidine has been examined and calculated in detail through a set of semi-empirical calculations. The results confirm previous interpretations of the experimental data and contribute to assign the symmetry of the lowest excited singlet states. Moreover, the most active modes have been individuated and the mechanisms of vibronic borrowing have been compared in the case of one-photon and two-photon spectra. |
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