Flash Photolysis of Nitrated Stilbenes in Acetonitrile Solutions: Triplet-StateLifetimes and Photoproduct Formation

摘要

Triplet-state lifetimes for 2,4-dinitrostilbene and 2,2',4,4'-tetranitrostilbeneof 50 and 25 ns respectively have been determined in acetonitrile solutions using laser flash photolysis. Five other highly nitrated stilbenes, possessing the common structural feature of three nitro groups in the 2, 4, and 6 positions of one benzene ring, have also been studied under the same conditions. For these molecules, rapid photoproduct formation precludes the determination of triplet-state lifetimes and the observed transient species has a lifetime of 34 ns. (jg).