Temperature shifts of phenanthrene S<sub>2</sub>&#8592;S<sub>0</sub> spectrum in apolar solvents and in water

Igor A. Ar'ev; Nikolai I. Lebovka

doi:10.1117/12.569592

20 July 2004 Temperature shifts of phenanthrene S₂←S₀ spectrum in apolar solvents and in water

Igor A. Ar'ev, Nikolai I. Lebovka

Proceedings Volume 5507, XVI International Conference on Spectroscopy of Molecules and Crystals; (2004) https://doi.org/10.1117/12.569592
Event: XVI International Conference on Spectroscopy of Molecules and Crystals, 2003, Sevastopol, Ukraine

Abstract

Phenanthrene, a three ring aromatic hydrocarbon, is used as a model substance for study of intermolecular interactions in dilute solutions of organic solvents and water by spectroscopic method. Temperature dependencies of shift of the S₂ ←S_O spectrum of phenanthrene dissolved in apolar solvents and in liquid water are studied in this work. The spectroscopic data are used for analysis of the cavity radius R for phenanthrene molecule in solvents. It is shown that the value of R increases with temperature in organic solvents. In contrast, for water solution, the value ofR initially grows with temperature increase (in the interval of 273.3-296 K), but becomes constant at higher temperatures. The changes of water structure in the neighbourhood of a phenanthrene molecule and probable hypothesis about causes of R value constancy in high-temperature region are discussed. Conclusion about strengthening ofthe water structure in an aqueous cage with phenanthrene molecule inside is done.

Citation Download Citation

Igor A. Ar'ev and Nikolai I. Lebovka "Temperature shifts of phenanthrene S₂←S₀ spectrum in apolar solvents and in water", Proc. SPIE 5507, XVI International Conference on Spectroscopy of Molecules and Crystals, (20 July 2004); https://doi.org/10.1117/12.569592

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