Stimuli-Responsive Near-Infrared Emissive Os(II)-Terpyridine Complexes with a Sense of Logic.

ABSTRACT: Two bis-tridentate Os(II) compounds based on a heteroditopic terpyridine-bipyridine-type ligand were synthesized, and their photophysical properties were thoroughly studied. The compounds exhibit strong spin-allowed ¹MLCT bands in the visible domain (489-521 nm) as well as weak ¹GS to ³MLCT bands within the 668-815 nm domain. The compounds display strong luminescence from the ³MLCT state in the near-infrared domain (728-780 nm) at room temperature having lifetimes in the range of 20.0-171.0 ns. After coordination of [Os(tpy-PhCH₃/H₂pbbzim)₂]²⁺ unit to the terpyridine site of tpy-Hbzim-dipy, the complexes offer vacant pyridine-imidazole motifs for interacting with cationic and anionic guests. Consequentl

SUBMITTER: Bar M 

PROVIDER: S-EPMC6649268 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature