PHOTOSTIMULATED LUMINESCENCE OF SILVER CLUSTERS IN ZEOLITE-Y

Upon UV-irradiation at 254 nm, the photoluminescence of silver atoms i n zeolite-Y decreases, meanwhile an absorption band shows up around 84 0 nm. By photostimulation at 840 nm, fluorescence of silver atoms is d etected, which is called photostimulated luminescence, and the photolu minescence of silver atoms is increased slightly. These phenomena are attributed to the charge-transfer interaction between the zeolite fram ework and the entrapped silver atoms. (C) 1997 Published by Elsevier S cience B.V.