Photoluminescence of ZnS-PVK nanocomposites confined in ethylenediamine modified MCM-41

PVK-ZnS nanocomposites were synthesized in ethylenediamine grafted MCM-41. The content of ZnS in MCM-41 was determined by chemical analysis and ICP atomic emission spectrophotometer, and the photoluminescence of PVK-ZnS in MCM-41 was also investigated. When PVK-ZnS was confined in ethylenediamine modified MCM-41, an emission peak at 468 nm was observed. Further analysis indicated that the emission would be attributed to the exciplex of excited state PVK molecules and ground state ZnS clusters. The ethylenediamino groups and the mesopores in MCM-41 played important roles in the exciplex emission from PVK and ZnS nanocomposites. (C) 2002 Elsevier Science B.V. All rights reserved.