Photoisomerization of Oxime Ethers and Efficiency of Triplet Formation via Exciplexes

Article abstract of DOI:10.1246/bcsj.62.2213

9,10-Dicyanoanthracene(DCA)-sensitized isomerization of (E)- and (Z)-isomers of an oxime ether of 2-acetylnaphthalene (E-1 and Z-1, respectively) was investigated in benzene by means of steady irradiation and laser flash photolysis.The excited singlet DCA was effectively quenched by E-1 and Z-1 to afford exciplexes, decay of which gave DCA triplets or 1 triplets.The triplet state of 1 was proposed as the isomerization intermediate and the formation efficiency of 1 triplets was estimated from isomerization quantum yields.