Infrared reflection absorption spectroscopic study on the photodimerization process of a stilbazolium cation embedded in Langmuir-Blodgett films

Abstract

Infrared reflection absorption (IRA) spectroscopy was applied to photodimerization process induced by irradiation (at 340 nm) of N-(1-octadecyl)-4-stilbazolium cations (C 18 S) incorporated in the Langmuir-Blodgett films of perdeuterated arachidic acid (CD 3 (CD 2 ) 18 COOH, A). The IRA spectra proved that the main process proceeds through cyclobutane ring formation of the stilbazolium cations in a syn head-to-head arrangement