期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 993, 期 1-3, 页码 2-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molstruc.2011.01.029
关键词
Electronic spectroscopy; Rotationally resolved spectroscopy; Structural analysis; Ab initio theory; Excited states; Evolutionary algorithms
The rotationally resolved electronic spectrum of tetrahydrocarbazole seeded in a molecular beam has been taken. The lowest excited singlet state of tetrahydrocarbazole could be shown to have L-a character, in contrast to nearly all other indole derivatives, which have the L-b as lowest state. An upper limit for the energy difference of both states can be estimated to be 1000 cm(1) with the L-b state being structurally and energetically close to the intersection of both states. Comparison of the rotational constants and the vibrational wavenumbers to the results of ab initio calculations shows, that the saturated six-ring is in a twisted configuration in both electronic states. (C) 2011 Elsevier BM. All rights reserved.
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