نتایج جستجو برای: charge transfer complexes
تعداد نتایج: 542536 فیلتر نتایج به سال:
The transfer of charge at the molecular level plays a fundamental role in many areas of chemistry, physics, biology and materials science. Today, more than 60 years after the seminal work of R. A. Marcus, charge transfer is still a very active field of research. An important recent impetus comes from the ability to resolve ever faster temporal events, down to the attosecond time scale. Such a h...
Electroabsorption (Stark effect) spectra are reported for the charge-transfer transitions of (NH3)SRuL2+ and [(NH3)5R~]2L4+*5+, where L is pyrazine (pz) or 4,4'-bipyridine (4,4'-bpy). The spectra permit experimental estimates of the susceptibility of the transition dipole moment to an electric field, the change in polarizability (TrAu), and the magnitude of the change in permanent electric dipo...
An energy decomposition scheme based on the block-localized wave function ~BLW! method is proposed. The key of this scheme is the definition and the full optimization of the diabatic state wave function, where the charge transfer among interacting molecules is deactivated. The present energy decomposition ~ED!, BLW-ED, method is similar to the Morokuma decomposition scheme in definition of the ...
The atomic-level picture of transmembrane protein complexes in the photosynthetic membrane has now been completed by the recent publication of crystal structures of cytochrome b(6)f and photosystem II. The two structures of cytochrome b(6)f, together with previously reported structures of the cytochrome bc(1) respiratory complex, provide a basis for understanding the central electron and proton...
Molecular complexes in the ratio 1:1 were formed in aqueous solution between various methoxysubstituted phenylisopropylamine (amphetamine) hydrochloride or oxalate salts and riboflavin deri vatives (flavin mononucleotide and flavin adenine dinucleotide). The association constants for these complexes were determined by the fluorescence quenching method as well as by the absorption method. The n...
The interaction of the perimidone drug in solution state with the σ-acceptor iodine, the aliphatic π-acceptor tetracyanoethylene (TCNE) and the aromatic π-acceptor 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) have been studied through the initial formation of ionic intermediate to charge transfer (CT) complex in methanol at room temperature. The spectral studies of the complexes were determi...
fac-[Re(CO)3(dppz)] complexes of amido ligands generated in situ under basic conditions display an intense (ε = 16460 L mol-1 cm-1) absorption band between 500-700 nm which are assigned to an n(amido,RNH-) → π* (dppz) inter-ligand charge transfer band offering an extraordinarily low energy charge separating absorption with potential for imaging and energy application.
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