Phenyl charge transfer systems

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- ... 

EH methods have been used to scan the conductance properties of molecular wires for a variety of chemical compositions [15] and the influence of the way they are interconnected to each other has also been addressed [16]. For the physically more complex issue of the influence of details of the molecule/electrode interface and related electron density polarization and charge transfer effects, DFT simulations have been performed for chemically rather simple test systems such as dithio-phenyl radicals [17] or the original proposal for the Aviram-Ratner diode [18]. For the research in this field in the future, it is expected that both methods will be further developed and... 

Ru(V1)(TPP)(0)2/02 system, the electron-rich styrenes gave more para-substituted phenyl-acetaldehyde byproducts than the electron-poor styrenes. For example, 19.5 equiv of the aldehyde and 3.8 equiv of the epoxide was produced in the oxygenation of methoxystyrene while the epoxidation of chlorostyrene produced less than 1 equiv of the aldehyde and 37 equiv of the chlorostyrene oxide based on catalyst. In order to explain these data, a mechanism has been proposed (Scheme 1.12) in which the rate-limiting-step of the initial partial charge transfer is separated from the product-forming step. Phenyl-acetaldehydes are believed to be formed by a... 

Donor-acceptor stilbene systems with A,A-dimethylamino groups as the donor and pyridine, thiophene, quinoline and other aryl groups as acceptors exhibit electrogenerated chemiluminscence by intramolecular charge transfer. The influence of A-substituents (methyl and phenyl) on the photophysical behaviour of fra/7 -4-aminostilbene has been evaluated.Calculations have been carried out on ra -4-dimethylamino-4 -cyanostilbene, and the torsion within the central ethenic moiety was calculated. The isomerization of such systems was discussed. ... 

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