LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF PLATINUM-ETHYNYL

We report an experimental investigation of absorption, fluorescence, a nd nonlinear absorption in a platinum-ethynyl complex. We have observe d strong singlet absorption at 355 nm, and a weaker triplet absorption at 520 nm. Photoluminescence measurements show a fluorescence band at 400 nm and a phosphorescence band at 520 nm, Pump-probe nonlinear abs orption measurements confirmed that S-0-->T-1 followed by excited trip ler-state absorption corresponds to the dominant excitation path in th e region between 513 and 532 nm. (C) 1998 American Institute of Physic s. [S0021-9606(98)01313-0].