Gy. Zheng et Dp. Rillema, COMPARISON OF SOLID-STATE AND SOLUTION PHOTOPHYSICAL PROPERTIES OF A PLATINUM(II) BIPHENYL DICARBONYL COMPLEX - A MULTIPLE-STATE EMISSION STUDY, Inorganic chemistry, 37(6), 1998, pp. 1392-1397
Pt(bph)(CO)(2), where bph is the biphenyl dianion, displays multiple e
mission by altering the temperature, solvent, or its state. Emission s
pectra and emission quantum yields are concentration and excitation wa
velength dependent. In dilute 4:1 ethanol/methanol at room temperature
, a structured emission at high energy (similar to 500 nm) occurs, but
in the solid state a nonstructured emission centered at (similar to 7
50 nm) is found. Between these extremes, two other emissions located a
t similar to 540 and similar to 650 nm are observed. Emissions from hi
gh energy to low energy are attributed to the following: tripler emiss
ion centered on the bph ligand, emission from a dimer (exciplex), emis
sion from an aggregate, and emission from ''stacked'' platinum(II) cry
stals.