Observations of transient intermediates during flash photolysis of 1,3-diphenyl-2-pyrazoline and its sulphonated derivative in solution

Abstract

At least two transient species have been observed during flash photolysis of a sulphonated derivative of 1,3-diphenyl-2-pyrazoline in aqueous solution. One of these, with absorption bands at 455 and 625 nm, has also been generated by sensitization with methylene blue and eosin Y, and appears to be a semi-oxidized species.