Coarse and Fine Tuning of the Electronic Energies of Triimineplatinum(II) Square-Planar Complexes

[Pt(tbtrpy)X]Y complexes (tbtrpy = 4,4‘,4‘ ‘-tBu3-2,2‘;6‘,2‘ ‘-terpyridine) exhibit charge-transfer absorption bands that can be
drastically red-shifted to long-wavelength visible absorptions with
arylthiolates as X. Further extension to the near-IR (NIR) region
is achieved with 7,7,8,8-tetracyanoquinodimethane (TCNQ-) as
Y-, resulting in black absorbers with continuous UV−vis−NIR
absorptions and opening up potential applications in energy
research.