Quenching of poly(vinyl phenyl ketone) photolysis by energy transfer in solution

摘要: The Stern-Volmer constant of 40 quenchers was determined at 366 nm for poly(vinyl phenyl ketone) photolysis in benzene and dioxane solution room temperature. Aromatic hydrocarbons, dienes olefins were used as quenchers. A procedure quantitative separation the screening effect absorbing irradiation wavelength elaborated. correctness this checked using 2-hydroxy-5-methyl benzophenone over concentration range 0-10−3 mole/1. values constants lay within 0-250 1./mole, expressing changes rate quenching. found to be naphthalene, its alkyl, halogen derivatives esters about 70 that 1-naphtyl amine 1- 2-naphtol being, however, substantially higher. Electron-deficient equally effective dienes. There has not so far been a parameter characterize unambiguously quenching efficiency compounds investigated.