Showing papers in "Chemical Reviews in 1977"

Nonradiative electronic relaxation under collision-free conditions

Abstract: A review is given of the study of radiationless transitions between electronic states or organic molecules. The review is written with three important points in mind: (1) it primarily is addressed to workers outside the field of theoretical chemistry and chemical physics. The purpose is to rationalize the key features of the experimental effects which have been observed to date, rather than to present a general, first-principles theory; (2) a discussion is given of both theory and experimental results; (3) the review is confined to studies in low pressure gas phase, concentrating on the electronic relaxations in organic species which do not involve dissociation or significant molecular rearrangement. A comparison between gas-phase and solid-state results is made and examples are offered for the extension of radiationless transition theory to photochemistry. 255 references. (SC)

Intermolecular vibrational energy transfer in thermal unimolecular systems

Abstract: : A comprehensive review of energy transfer in thermal unimolecular systems in the period from 1920 to 1976 is given. Continuing areas of interest are described and results from related techniques are correlated. (Author)