Abstract
The molar extinction coefficient, oscillator strength, natural fluorescence lifetime, and fluorescence quantum yield have been determined for 9,10-diiodoanthracene in ethanol at 20°C. The temperature effect on the quantum yield was studied in the range 120–300 K. The fluorescence lifetime was measured at 77 K. During glassification of ethanol, the fluorescence intensity of 9,10-diiodoanthracene increases by more than 50 times due to the activation nature of the intersystem crossing from the S1(1B +2u ) state. The activation energy and pre-exponential factor for the probability of the intersystem {ie319-01}-crossing are found. The long-wavelength shift of the absorption spectrum with increasing bulk polarizability of the solvent is interpreted as evidence of changes in the nonspecific interactions.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 75, No. 3, pp. 304–308, May–June, 2008.
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Pavlovich, V.S., Stupak, A.P., Pikulik, L.G. et al. Absorptivity and fluorescence properties of 9,10-diiodoanthracene in solutions. J Appl Spectrosc 75, 319–324 (2008). https://doi.org/10.1007/s10812-008-9048-z
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DOI: https://doi.org/10.1007/s10812-008-9048-z