Supramolecular Photochemistry

The intellectual and utilitarian opportunities that lie at the frontiers of chemistry have been recently emphasized by the Pimentel Report. Such report recommends that in the field of chemical research priority should be given to "understanding chemical reactivity" and proposes initiatives aimed at the clarification of factors that control the rates of reaction and the development of new synthetic pathways for chemical change. In the broad field of chemical reactivity, a discipline that has grown with an extraordinary rate is photochemistry. Since the knowledge of the photochemical properties at the molecular level has made a substantial progress in the last few years, there is currently a trend to study more and more complex photochemical systems. In particular, an emerging and rapidly expanding branch of photochemistry is that concerning studies of assemblies of molecular components properly combined so as to obtain light-induced functions (supramolecular photochemistry). Although much of the current work in supramolecular photochemistry is fundamental in nature, it is clear that progress in this field will be most rewarding for several applications concerning the interaction of light with matter. In particular, it will allow us to pursue research aimed at the photochemical conversion of solar energy by means of artificial systems and to make progress towards futuristic branches of science called "photonics" (photo-generated electron migration processes on a molecular basis) and "chemionics" (design of components, circuitry, and information treatment at the molecular level).

Autorentext
Vincenzo Balzani, born in 1936, received his Laurea in 1960. Since 1973 he is full professor of chemistry in Bologna, Italy. His research interests are molecular-level devices and machines, nanotechnology, supramolecular chemistry, photochemistry, -physics, -catalysis, electron transfer reactions, luminescent sensors, and solar energy conversion.

Klappentext

Proceedings of the NATO Advanced Research Workshop on Photoinduced Charge Separation and Energy Migration in Supramolecular Species, Anacapri, Isle of Capri, Italy, April 5-10, 1987

Zusammenfassung
`... the editor has succeeded in bringing together a large collection of coherent papers on this timely subject. The book thereby constitutes an important, and up-to-date overview of recent efforts to construct complex molecular species and molecular assemblies that allow one to probe into the intricacies of electron transfer and transfer processes.'
`A comprehensive subject index completes this volume that should be on the shelf of everyone interested in this field.'
Recueil des Travaux Chimiques des Pays Bas, Vol.. 107, No. 5, May 1988.

Inhalt
Towards a supramolecular photochemistry : assembly of molecular components to obtain photochemical molecular devices.- Photophysical and photochemical aspects of supramolecular chemistry.- Some recent developments in electron transfer: charge separation, long distances, solvent dynamics, and free energy aspects.- Photoinduced electron transfer through long rigid non-conjugated bridges: theory and experiment for model systems.- The distance and temperature dependence of electron-transfer rates.- Photoinduced looping electron transfer. What occurs between electron transfer and charge separation?.- Intramolecular control of light induced electron transfer.- Cyano-bridged supramolecular systems containing the Ru(bpy)22+ photosensitizer unit.- Intramolecular energy and electron transfer in polymetallic complexes.- Photoinduced charge separation in ion-pair electron donor-acceptor aggregates.- Electronic inefficiencies in inter- and intra-molecular energy and electron transfer.- Antenna effect in Eu3+ and Tb3+ cryptates.- Energy transfer in synthetic porphyrin arrays.- Competitive energy and electron transfer quenching of the triplet states of organic compounds by Cr(tfac)3 and Cr(tfbzac)3 in benzene.- Through-bond electronic couplings in intramolecular electron transfer reactions.- Photoinduced electron transfer in fixed distance chlorophyll-quinone donor-acceptor molecules.- Electron transfer in model systems for photosynthesis.- Transmembrane charge transfer in model systems for photosynthesis.- Inter- and intramolecular quenching of porphyrin excited states by quinones.- Molecular structure in the electron-localized excited states and the radiative electron transfer.- Small-overlap charge transfer states in large molecular systems.- Chain effect and magnetic field effecton the photoinduced electron transfer reactions of polymethylene-linked donor acceptor systems.- Photoinduced charge separation and energy migration in condensed matter: examples and applications.- Reactions of delocalized excited states generated in restricted environments.- Photosensitized hole injection from Langmuir-Blodgett films into molecular crystals; the influence of image potential and through-bond effects.- Metal-loaded polymers as materials for photoinduced charge separation.- Inter-particle electron transfer in semiconductor dispersions: a new strategy in photocatalysis.- Vectorial electron transfer in organized assemblies and colloidal semiconductors.- Report on the general discussion on Future Trends: Theoretical aspects.- Report on the general discussion on Future Trends: Applicative aspects.- Author index.