Site selection spectroscopy of polyatomic molecules: principles, applications and possibilities

Abstract

Brief review of a new branch in the spectroscopy of complex organic molecules in solutions - Site Selection Spectroscopy - is given. Principles and methods to reveal a line structure in the inhomogeneously broadened absorption and luminescence spectra by means of selective laser excitation are described. Some examples are shown to demonstrate new possibilities of selective methods for precise investigations of: energy levels of organic molecules; electron-phonon interactions; the Zeeman and Stark effects, spectrochemical analysis of complex organic materials, etc.