Abstract
The decay rate of the excited state of the enol form of dibenzoylmethane (DBM) in different solvents is measured directly using nanosecond light pulses. The observed relaxation kinetics is explained by the formation of three intermediate forms of the excited cis‐enol form of DBM. The decay rates of the intermediates and their absorption cross sections for λ = 266 nm are reported too.
Highlights
The photochemical behaviour of enolizable/3-dicarbonyl compounds, their derivatives and analogous have been a subject of recent intensive studies
Experimental -3 and theoretical-6 data give evidence to suggest that excitation of the chelated enol form leads to the formation of more than one non-chelated short-lived species
The delay time between the output pulses of both lasers was varied in the range 0-10 s by a proper electronic control of the electrooptic switches used in both lasers
Summary
The photochemical behaviour of enolizable/3-dicarbonyl compounds, their derivatives and analogous have been a subject of recent intensive studies. We are reporting here the results of the determination of the decay time of the excited dibenzoylmethane enol form and the probable energy scheme of the relaxation process
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