Electron Transfer. Shunichi Fukuzumi

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СКАЧАТЬ target="_blank" rel="nofollow" href="#ulink_2d07c762-858f-5e76-8aa8-ae5a1aedfb1f">Figure 4.7 (a) Synthetic procedure of CNC–(H₂P)_n. (b) TEM image of CNC–(H₂P)_n.

      Source: Ohtani et al. 2009 [99]. Reproduced with permission of John Wiley & Sons.

The CS state of CNC–(H₂P)_n detected in Figure 4.8a decays obeying clean first‐order kinetics: the first‐order plots at different initial CS concentrations afford linear correlations with the same slope (Figure 4.8b) [99]. Thus, the decay of the CS state results from back electron transfer in the nanohybrid rather than intermolecular back electron transfer from CNC^·− to H₂P^·+. The CS lifetime was determined from the first‐order plots in Figure 4.8b to be 0.64 ± 0.01 ms, which is the longest lifetime ever reported for electron donor‐attached nanocarbon materials [99]. Such a long CS lifetime may be ascribed to the efficient electron migration in the CNCs following CS.

Figure 4.8 (a) Transient absorption spectra of (a) CNC–(H₂P)_n taken at 20 and 1.8 ms after laser excitation at 426 nm and (b) ref‐H₂P in deaerated DMF at 298 K taken at 100 ms and 1.6 ms after laser excitation at 426 nm. (c) Decay time profiles and (d) first‐order plots at 470 nm with different laser powers (5, 3, 2, and 1 mJ/pulse).

      Source: Ohtani et al. 2009 [99]. Reproduced with permission of John Wiley & Sons.

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