Chromophore-Functionalized Phenanthro-diimine Ligands and Their Re(I) Complexes.

ABSTRACT: A series of diimine ligands has been designed on the basis of 2-pyridyl-1 H-phenanthro[9,10- d]imidazole (L1, L2). Coupling the basic motif of L1 with anthracene-containing fragments affords the bichromophore compounds L3-L5, of which L4 and L5 adopt a donor-acceptor architecture. The latter allows intramolecular charge transfer with intense absorption bands in the visible spectrum (lowest λ_abs 464 nm (ε = 1.2 × 10⁴ M^-1 cm^-1) and 490 nm (ε = 5.2 × 10⁴ M^-1 cm^-1) in CH₂Cl₂ for L4 and L5, respectively). L1-L5 show strong fluorescence in a fluid medium (Φ_em = 22-92%, λ_em 370-602 nm in CH₂Cl₂); discernible emission solvatochromism is observed for L4 and

SUBMITTER: Kisel KS 

PROVIDER: S-EPMC6150663 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature