Preface
The principal purpose of this book is to provide the readers who research or study in
the fields of molecular spectroscopy/molecular physics, as well as chemical
physics/physical chemistry and atmospheric photochemistry, with basic frameworks and characteristics of processes, that occur in electronically-excited states of
small molecules, complexes, and clusters. These states can be populated due to the
absorption of a photon or collisionally; a photon can radiate in the latter case.
Absorption of a photon accompanied by the decay of species (molecule, complex,
cluster) excited states or a process of formation of a species excited state in a
collision which is accompanied by radiation are referred to as photoprocesses.
Different intra- and intermolecular interactions, including collision-induced processes, can occur in electronically-excited states.
Many of the data and features concerning subjects in the books have not been
discussed in monographs previously published. The book can be used as a textbook
for students. Problems useful for students are included in Chap. 2.
The book offers a detailed treatment of nonadiabatic perturbations in
electronically-excited valence states of molecules induced by intramolecular and
intermolecular interactions in collisions or optically populated weakly-bound
complexes. The author is an expert in these fields of science. He studies them for
more than 50 years. A significant part of the data discussed in the book has been
obtained in the author’s laboratory.
Saint Petersburg, Russia
Anatoly Pravilov
v
The principal purpose of this book is to provide the readers who research or study in
the fields of molecular spectroscopy/molecular physics, as well as chemical
physics/physical chemistry and atmospheric photochemistry, with basic frameworks and characteristics of processes, that occur in electronically-excited states of
small molecules, complexes, and clusters. These states can be populated due to the
absorption of a photon or collisionally; a photon can radiate in the latter case.
Absorption of a photon accompanied by the decay of species (molecule, complex,
cluster) excited states or a process of formation of a species excited state in a
collision which is accompanied by radiation are referred to as photoprocesses.
Different intra- and intermolecular interactions, including collision-induced processes, can occur in electronically-excited states.
Many of the data and features concerning subjects in the books have not been
discussed in monographs previously published. The book can be used as a textbook
for students. Problems useful for students are included in Chap. 2.
The book offers a detailed treatment of nonadiabatic perturbations in
electronically-excited valence states of molecules induced by intramolecular and
intermolecular interactions in collisions or optically populated weakly-bound
complexes. The author is an expert in these fields of science. He studies them for
more than 50 years. A significant part of the data discussed in the book has been
obtained in the author’s laboratory.
Saint Petersburg, Russia
Anatoly Pravilov
v