Photoionization of methylphenothiazine in transition metal containing silicoaluminophosphates

Photoionization of methylphenothiazine was studied in different pore size s ilicoaluminophosphate microporous materials at room temperature. The photoy ield of methylphenothiazine cation radical was enhanced by an order of magn itude or more by incorporation of Ni, Co and Cu transition metal ions as el ectron accepters into framework sites or ion exchange sites of the micropor ous materials. Nickel ions had stronger effects on the photoyield than the others. The photoyield also increased with the silicoaluminophosphate pore size. (C) 2000 Elsevier Science B.V. All rights reserved.