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- W1982436093 abstract "Ultrafast dynamics of isomeric (tricyclohexylphosphine)gold(I) pyrenyl complexes have been measured in chloroform and cyclohexane at room temperature. Internal conversion from an upper excited singlet (Sn) to the S1 state occurs in less than 200 fs after 340 nm excitation. Internal conversion in the singlet manifold is followed by 11−100 ps intersystem crossing to a receiver triplet state depending on the site of pyrene metalation. The receiver triplet state (Tn) then decays to the T1 state on an ultrafast time scale, which decays back to the S0 state on a microseconds time scale in N2-saturated conditions. Time-dependent density functional theory calculations on model complexes predict an accidental degeneracy of the S1 and T2 states of the 1-pyrenyl. No such degeneracy occurs for the 2-pyrenyl isomer. A small S1−T2 energy gap promotes the 10-fold increase in the intersystem crossing rate in the 1-pyrenyl complex." @default.
- W1982436093 created "2016-06-24" @default.
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- W1982436093 date "2010-03-26" @default.
- W1982436093 modified "2023-09-25" @default.
- W1982436093 title "Excited-State Dynamics of (Organophosphine)gold(I) Pyrenyl Isomers" @default.
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- W1982436093 doi "https://doi.org/10.1021/jz100052m" @default.
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