An apparatus capable of measuring triplet–triplet absorption spectra in the 200–300 nm region for molecules with triplet lifetimes in the 1 ms–100 ns region is described. Spectra obtained for some fluoro-, methyl- and trifluoromethyl-substituted benzenes in the vapour phase are assigned using CNDO/S calculations. Comparison is made with predictions from other calculations.
G. D. Abbott, J. Dyke, D. Phillips and M. E. Sime, J. Chem. Soc., Faraday Trans. 2, 1982, 78, 1971 DOI: 10.1039/F29827801971
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