Time-resolved photothermal lens calorimetry for investigating mixed-order photoinitiated reaction kinetics in liquids

α-C−H Bond Dissociation Energies of Some Tertiary Amines

“…They report a value of 110.8 ± 1.5 kcal/mol. Subsequently, a significantly lower value of 103 ± 3 kcal/mol was obtained using photothermal lens spectroscopy . The large differences between these values prompted us to pursue a slightly modified approach.…”

Modern analytical thermooptical spectroscopy

“…For example, the photochemical reaction involving the 2-naphthylmethyl radical was discovered, 430 and the behaviour of benzophenone in acetonitrile and propan-2-ol was investigated. 545 Photochemical thermooptical spectroscopy is used to determine the thermodynamic characteristics (the enthalpy, entropy and free energy) of chemical processes and to control the parameters of chemical reactions by varying the intensity of excitation laser radiation. 455,538,541,547 Procedures in which the thermooptical detection is coupled with a method for concentrating an analyte component photoinduced by the laser beam, 548 photocatalysis and photocoagulation 398,399,549 are similar to the abovedescribed thermooptical measurements.…”

Triplet state photophysics in an aryleneethynylene π-conjugated polymer

“…Next, the triplet yield (F T ) for P0 was determined by time-resolved thermal lensing (TRTL). 15,16 In this method, F T is derived from the ratio of the 'slow' and 'total' heat deposition signals (U slow and U total , respectively) after correcting for the energy of the pump laser (E hv ) and the fluorescence quantum yield,…”