Jean-Marc Lanteri

Daniel Simon

Pierre Ausloos

Gilles Boulan

Jean-Pierre Dopagne

Jacky Viallon

Jean-Pierre Anthony (comédien).)

Jean-François Prévand

Laurent Denis

Céline Lansman

Jean-François Jaudon

Pascal Tresson

Jean-Luc Ohanessian

Christian Palustran

Pascale Millant

Lydie De Backer

Gilles Ascaride

Pierre Lorquet

Brieuc Coessens

Jean-Marie Ngaki Kosi-Basak

Judith De Waele

14 scènes inédites à lire et à jouer

Démocratie mosaïque 2

Camille Sandorfy

M.B. Robin

It is probably safe to predict that the future of chemistry is linked to the excited states of molecules and to other short lived species, ions and free radicals. Molecules have only one ground state but many excited states. However large the scope of normal, ground state chemistry might be, above and beyond it lies the world of excited states, each one having its own chemis try. The electronic transitions leading to the excited states, either discrete of continuous, are examined in molecular elec tronic spectroscopy. Electronic spectroscopy is the queen of all spectroscopies: for if we have the resolution we have everything. Vnfortunately, the chemist who is interested in the structure and reactions of larger molecules must often renounce all that infor mation. The spectra are complex and often diffuse; resolution does not always help. To understand such spectra he must look at whole families of molecules; to some extent structural analogies help. Let us call this chemical spectroscopy and handle it with care. In order to understand the properties of molecules we also need theory. We know that molecular problems are, in principle, soluble by the methods of quantum mechanics. Present time quan tum chemistry is able to provide a nearly accurate description of not too large molecules in their ground states. It is probablY again safe to predict that the future of quantum chemistry is connected with molecular excited states or, generally spoken, the accurate handling of the open-shell problem.

Proceedings of the Advanced Study Institute, held under the Auspices of NATO and the Royal Society of Canada, August 5–17, 1973, Valmorin, Quebec, Canada

Chemical Spectroscopy and Photochemistry in the Vacuum-Ultraviolet

Pierre Ausloos

About

Books

Join the club