Photoinduced charge-transfer processes

Memming, R. Photoinduced Charge Transfer Processes at Semiconductor Electrodes and Particles. 169, 105-182 (1994). 

Memming R (1994) Photoinduced charge transfer processes at semiconductor electrodes and particles. Top Curr Chem 169 105-181... 

In n-hexane, a similar band with a maximum at around 384 nm was observed with a comparably fast risetime, so that one can conclude that the photoinduced charge-transfer process in this fluorinated derivative is a quasi-barrierless process in both polar and non-polar solvents. Preliminary DFT calculations indicate that in vacuum DMABN-F4 is nonplanar in the ground state in contrast to DMABN [7]. The fact that the observed CT state absorption spectrum is blue-shifted compared to that of DMABN and of the benzonitrile anion radical (Fig. 3) might be an indication that the equilibrium geometry of the CT state of DMABN-F4 is different from that of the TICT state of DMABN or might be due to the influence of the four fluorine atoms. 

Similarly to the ex nT -e PPE —C6(, conjugates, a thorough investigation of photoinduced charge-transfer processes in Ky/ZnP-oPPEn-Cgo (15a-c) by electrochemical, spectroscopic and quantum mechanical methods will be presented in the next part of this thesis. The synthesis is described elsewhere [11]. 

Figure 1 Photoinduced charge transfer processes in semiconductor nanoclusters, (a) Under bandgap excitation and (b) sensitized charge injection by exciting adsorbed sensitizer (S). CB and VB refer to conduction and valence bands of the semiconductor and et and ht refer to trapped electrons and holes, respectively.

Photoinduced Charge Transfer Processes at Semiconductor Electrodes and Particles... 

Photoinduced Charge Transfer Processes This model is only applicable if three conditions are fulfilled ... 

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