Ultrafast interligand electron transfer in cis-[Ru(4,4'-dicarboxylate-2,2'-bipyridine)₂(NCS)₂]^4- and implications for electron injection limitations in dye sensitized solar cells.

ABSTRACT: Interligand electron transfer (ILET) of the lowest metal-to-ligand charge transfer (MLCT) state of N712 (cis-[Ru(dcb)₂(NCS)₂]^4-, where dcb = 4,4'-dicarboxylate-2,2'-bipyridine) in a deuterated acetonitrile solution has been studied by means of femtosecond transient absorption anisotropy in the mid-IR. Time-independent B3LYP density functional calculations were performed to assign vibrational bands and determine their respective transition dipole moments. The transient absorption spectral band at 1327 cm^-1, assigned to a symmetric carboxylate stretch, showed significant anisotropy. A rapid anisotropy increase (τ ₁ ≈ 2 ps) was tentatively assigned to vibrational and solvent relaxation, considering the excess energy availabl

SUBMITTER: Pettersson Rimgard B 

PROVIDER: S-EPMC6201818 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature