Photoinduced ultrafast multielectron transfer and long-lived charge-accumulated state in a fullerene-indacenodithiophene dumbbell triad.

ABSTRACT: Photoinduced ultrafast multielectron transfer (m-ET) and long-lived charge-accumulated states in single molecules hold promise for light-energy conversion and utilization. However, compared to single-electron transfer (s-ET), m-ET tends to be thermodynamically and kinetically unfavorable. Here, we construct a dumbbell-shaped fullerene-indacenodithiophene triad, IT2, modified with two C₆₀ units in the donor indacenodithiophene. Exciting the C₆₀ units, ultrafast m-ET occurs with a time constant of 0.5 ps, accumulating two holes with a lifetime of 10 μs. Benefitting from a larger driving force, lower reorganization energy, and smaller structural changes, the rate of m-ET is 23 times faster than that of s-ET, and the lifetime of the m-ET product is 1.4 × 10^5</

SUBMITTER: Wang C 

PROVIDER: S-EPMC11648911 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature