Collisional Energy Transfer Mechanisms between Singlet Oxygen and Iodine Monofluoride

摘要

Chemiluminescence was observed from iodine Monofluoride (IF) excited by singlet oxygen in a gas flow tube reactor as a means to study the 02-IF energy transfer mechanisms. Although several researchers have demonstrated singlet oxygen's ability to efficiently pump IF(X) to the IF(B) state, the exact details of the processes have not been determined. The purpose of this research was to conduct IF(B) chemiluminescence spectral analysis and O2(1 sigma)-quenching experiments to further define the excitation processes and to develop plausible mechanistic models based on experimental results. The spectral analysis revealed that the majority of the IF (B to X) transitions originated from the IF(B,v'=0) and IF(B,v'=1) energy levels. The O2(b)-quenching experiments suggest that O2(b) is not critical in the excitation of IF(X) under the conditions of this research. Two plausible mechanistic energy transfer models were presented based on experimental results. Theses. (aw)