The lowest triplet state of pyrimidine in a crystalline host at 1.2 K. The spin-sublevel emission spectra and their vibrational assignment |
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Authors: | CJ Nonhof JH van der Waals |
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Institution: | Center for the Study of Excited States of Molecules, Huygens Laboratory, University of Leyden, Leyden, The Netherlands |
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Abstract: | Spin-sublevel phosphorescence spectra of pyrimidine in benzene are reported. The spectra related to the in-plane spin axes consist of progressions of totally symmetric bands, whereas that of the third sublevel in addition shows strong non-totally symmetric bands. Assignments are given, and some out-of-plane modes previously in dispute are identified (ν10b = 808, ν17b = 960, νs = 992 cm?1, A2). As a check similar experiments were carried out of pyrimidine incorporated in p-xylene and cyclohexane. |
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