Donor-bridge-acceptor

Figure C 1.2.10. Representative examples of fullerene based donor-bridge-acceptor dyads and triads.

Guldi D M, Maggini M, Scorrano G and Prato M 1997 Intramolecular electron transfer in fullerene/ferrocene based donor-bridge-acceptor dyads J. Am. Chem. See. 119 974-80... 

Wiberg J, Guo L, Pettersson K et al (2007) Charge recombination versus charge separation in donor-bridge-acceptor systems. J Am Chem Soc 129 155-163... 

Hayes RT, Wasielewski MR, Gosztola D (2000) Ultrafast photoswitched charge transmission through the bridge molecule in a donor-bridge-acceptor system. J Am Chem Soc 122 5563-5567... 

Chen KY, Hsieh CC, Cheng YM et al (2006) Tuning excited state electron transfer from an adiabatic to nonadiabatic type in donor-bridge-acceptor systems and the associated energy-transfer process. J Phys Chem A 110 12136-12144... 

Napper AM, Head NJ, Oliver AM et al (2002) Use of U-shaped donor-bridge-acceptor molecules to study electron tunneling through nonbonded contacts. J Am Chem Soc 124 10171-10181... 

Paddon-Row MN (2003) Superexchange-mediated charge separation and charge recombination in covalently linked donor-bridge-acceptor systems. Aust J Chem 56 729-748... 

Ricks AB, Solomon GC, Colvin MT, Scott AM, Chen K, Ratner MA, Wasielewski MR (2010) Controlling electron transfer in donor-bridge-acceptor molecules using cross-conjugated bridges. J Am Chem Soc 132 15427... 

When the emissive state is a charge transfer state that is not attainable by direct excitation (e.g. which results from electron transfer in a donor-bridge-acceptor molecule see example at the end of the next section), the theories described above cannot be applied because the absorption spectrum of the charge transfer state is not known. Weller s theory for exciplexes is then more appropriate and only deals with the shift of the fluorescence spectrum, which is given by... 

Some bichromophoric systems, whose structure is based on the donor-bridge-acceptor principle, can undergo complete charge transfer, i.e. electron transfer. The resulting huge dipole moment in the excited state explains the very high sensitivity to solvent polarity of such molecules. An example is FP (l-phenyl-4-[(4-cyano-l- ... 

Figure 1. Typical donor-bridge-acceptor system.

FIGURE 26. Some donor-bridge-acceptor systems by which energy transfer occurs through both Forster and Dexter mechanisms. (Modified from Ref. 78.)... 

Photoinduced electron transfer in DONOR-bridge-ACCEPTOR systems [11-13],... 

Fig. 3.1 Schematic representation of photoinduced electron transfer (left) and electronic energy transfer (right) in a DONOR-bridge-ACCEPTOR (DBA) system...

Fig. 3.6 Charge hopping in a donor-bridge-acceptor system involving a modular bridge...

In summary, the electronic structure of all triads confirms the donor-bridge-acceptor character of the exTTF-oPPE -C60 systems and suggests that the HOMO - LUMO transition would represent a nearly complete charge-transfer excitation with a very low extinction coefficient. Since these findings are based on... 

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