Time-Resolved Photoacoustic Calorimetry

Abstract

Time-resolved photoacoustic calorimetry is an experimental method that provides both the dynamics and energetics of reactive intermediates that are produced in photochemical reactions. With the present apparatus, dynamics on the timescale spanning 10 nanoseconds to 50 microseconds can be resolved. The enthalpy sensitivity is + 1.0 kcal/mole. This technique has been applied to the hydrogen atom abstraction reaction of r-butoxy radical with phenol. Also, the strain enthalpy of 1-phenyl-trans-cyclohexene has been measured. © 1986 IUPAC