Malcolm G. Stock

TL;DR: In this paper, the use of the optic-acoustic effect in the study of radiationless processes from excited electronic states is discussed, and a multi-state relaxation model is developed, and it is shown in some detail for a system of simple photophysical processes which are typical of those observed for aromatic molecules.

TL;DR: In this paper, the photophysical processes in biacetyl vapour were studied using the optic-acoustic effect following excitation with radiation of wavelength 436 nm, and an analysis was developed to apply the technique to second-order reactions, and the rate of triplet-triplet annihilation was measured as 23(±03)× 1011 dm3 mol−1 s−1 at 298 K A triplet yield of 097 ± 0015 was determined

TL;DR: Optic-acoustic measurements on the triplet state relaxation of benzene and [2H6] benzene are described in this article, where the concentration dependent term is discussed in terms of triplet excimer formation which may facilitate the passage through an isomeric intermediate to ground state benzene.

TL;DR: In this paper, Spectrophone data are presented for low pressures of benzene excited so as to produce the ground state with ≈ 40 000 cm-1 excess vibrational energy.

TL;DR: In this article, the lifetime of the lowest triplet states of toluene and ethylbenzene has been investigated and models for the pressure-independent and pressure-dependent parts of the triplet state deactivation are briefly discussed.