Synthetic, spectroscopic, computational and biological imaging studies of platinum trimethyl bipyridyl thiolate complexes of the general formula [PtMe3(bpy)SR] reveal these to be easily accessed, tunable bioimaging agents which feature an unusual σ-π∗ Inter-Ligand Charge Transfer (ILCT) transition, and in some cases emit into the Near infra-red (NIR).
Steel, H. L., Allinson, S. L., Andre, J., Coogan, M. P., & Platts, J. A. (2015). Platinum trimethyl bipyridyl thiolates - New, tunable, red- to near IR emitting luminophores for bioimaging applications. Chemical Communications, 51(57), 11441-11444. https://doi.org/10.1039/c5cc04003e