Donor and acceptor state selectivity in resonant energy transfer

Abstract

Sm2[Pt(CN)4]3·18H2O compounds exhibit a radiationless energy transfer from linear [Pt(CN) 4]2- stacks (donors) to Sm3+ cations (acceptors). A Sm3+ emission is found, resulting from the lowest excited Sm3+ state (4G5/2-4F 5/2). The energy transfer is a selective process, which has been investigated by polarized emission measurements on single crystals under high pressure. As donor state we identify the lowest excited state of the stacks (mainly emitting E⊥c polarized light) while the relevant acceptor state is the Sm3+4F3/2 state being the second excited state. © 1982 American Institute of Physics.