|Title||PHOTOCHEMISTRY OF MACROCYCLIC KETONES WITHIN ZEOLITES - COMPETITION BETWEEN NORRISH TYPE-I AND TYPE-II REACTIVITY|
|Publication Type||Journal Article|
|Year of Publication||1991|
|Authors||Ramamurthy, V, Lei, XG, Turro, NJ, Lewis, TJ, Scheffer, JR|
|Type of Article||Article|
|Keywords||ALKANONES, ALKYL, ALPHA-CLEAVAGE, DIBENZYL KETONES, FAUJASITES, KETONES, photolysis, TEMPERATURE-DEPENDENCE|
Photolysis of macrocyclic mono- and diketones (1 and 2) included in X and Y zeolites gives Norrish type I products in addition to the products obtained via the Norrish type II process, the only observed process in isotropic media. Enhancement of the type I over the type II process is cation-dependent and especially large enhancements are obtained with Li and Na as cations. The zeolite effect is attributed to a reduction in the rate of the Norrish type II gamma-hydrogen abstraction process.
|URL||<Go to ISI>://A1991GX96200012|