화학공학소재연구정보센터
Journal of Physical Chemistry A, Vol.116, No.5, 1333-1336, 2012
Luminescence of Ion-Pair States of Halogens in Liquid Perfluorocarbons
The I-2(D'-A') luminescence in liquid C7F16, C8F18, C9F20, and C12F26 has been observed following irradiation with visible (within the I-2 X --> B band region) and UV (lambda < 300 nm) lasers. The band is shifted by similar to 2000 cm(-1) to the red relative to the gas phase and is significantly broader (fwhm approximate to 3000 cm(-1) vs 500 cm(-1) in the gas phase). Two-color excitation of other halogens in CnF2n+2 solvents revealed similarly shifted and strongly broadened D'-A' bands of Br-2, IBr, and BrCl. The stability of the ion-pair states of halogens in room temperature liquids opens new experimental opportunities for condensed phase studies and may be of applied interest considering the increasing industrial applications of perfluorocarbons.