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- W2058049741 abstract "Photophysical measurements have been made on 1,2-C70H2, the most stable isomer of the simplest C70 derivative. This dihydride's electronic absorption spectrum is more diffuse than that of C70. Red shifts in the fluorescence and phosphorescence emission spectra show that excitations to the lowest singlet and triplet electronic states require approximately 8% less energy in 1,2-C70H2 than in C70 and that the S1−T1 gap of 1,2-C70H2 is ca. 310 cm-1 smaller than that of the parent fullerene. The dominant peak in the dihydride's Tn ← T1 near-infrared absorption spectrum falls at 1050 nm. Compared to the corresponding transition of C70, this absorption feature is broadened, red-shifted by 75 nm, and reduced in peak molar absorptivity by a factor of 2. Derivatization of C70 to form 1,2-C70H2 accelerates T1 decay by more than an order of magnitude, giving an intrinsic triplet lifetime of 2.0 ms at room temperature. The rate constant for triplet deactivation through ground state self-quenching is near 7.6 × 107 M-1..." @default.
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- W2058049741 date "1999-11-12" @default.
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- W2058049741 title "Photophysical Studies of 1,2-C<sub>70</sub>H<sub>2</sub>" @default.
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- W2058049741 doi "https://doi.org/10.1021/jp9928412" @default.
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