Charge migration and charge transfer in molecular systems

Charge migration and charge transfer in molecular systems

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...

Charge Transfer in Molecular Crystals.

Organic Charge Transfer Systems: the Next Step in Molecular Electronics?

Since the 1950s a lot of effort has been devoted into the development of organic conductors. By a substantial degree this has been inspired by W. A. Little’s theoretical analysis of London’s idea that superconductivity might occur in organic macromolecules or polymers [1]. Over time this has resulted in the discovery of several organic metals and superconductors, albeit not with spectacularly h...

Charge Resonance and Charge Transfer Interactions

Abstrtct Chrge resonance interaction in naphthalene homomd heterodimer cations is studied by photodissociation spc'troscopy ofthe charge resonance and the local excitation transitions. The resonance interaction in naphthalene dimer cation is slightly weaker than that ofa benzene dimer cation because ofpartial overlapping ofthe respective aromatic rings. A local excitationband ofthe benzene cati...

Charge-transfer crystallites as molecular electrical dopants

Ground-state integer charge transfer is commonly regarded as the basic mechanism of molecular electrical doping in both, conjugated polymers and oligomers. Here, we demonstrate that fundamentally different processes can occur in the two types of organic semiconductors instead. Using complementary experimental techniques supported by theory, we contrast a polythiophene, where molecular p-doping ...