Laser-initiated iodine radical chemistry in single microdroplets

Authors

Bartholomew S. Vaughn, University of WollongongFollow
Phillip J. Tracey, University of WollongongFollow
Adam J. Trevitt, University of WollongongFollow

RIS ID

70415

Publication Details

Vaughn, B. S., Tracey, P. J. & Trevitt, A. J. (2012). Laser-initiated iodine radical chemistry in single microdroplets. Chemical Physics Letters, 551 134-138.

Abstract

Iodineradical reactions insingle free-falling microdroplets of iodododecane, initiated using UV laser photolysis, are probed using Raman spectroscopy. Stimulated Raman spectra, with 532 nm laser excitation, are recorded at varying time delays from the UV pulse. I atom recombination reactions lead to I₂ that changes the optical properties of the microdroplet ultimately quenching the Raman signal. This quenching is observed over ∼10 ns, which is about the time resolution of the two-laser experiment. Although the kinetics are too rapid to be measured in current laser configuration, it demonstrates that radical kinetics can be followed insinglemicrodroplets.