Aromatic pendant group polymers, localized

Relaxation Energy Shifts and Localized Molecular-Ion States in Aromatic Pendant Group Polymers. The electronic structure of polystyrene (PS) and poly vinyl pyridine (PVP) have been studied using a variety of electronic spectroscopies and model calculations (W). Here, we review the results of the UPS and ultra violet absorption spectroscopy (UAS) portion of that study, and discuss the results in a phenomenological manner. The aim of this... 

Intermolecular relaxation effects are a central issue in the interpretation of the ultraviolet photoelectron spectroscopy (UPS) of molecular solids. These relaxation effects result in several significant characteristics of UPS valence spectra, intermolecular relaxation phenomena lead to localized electron molecular-ion states, which are responsible for rigid gas-to-solid molecular spectral energy shifts, spectral line broadening, and dynamic electronic localization effects in aromatic pendant group polymers. 

In dilute solution of polymers with pendant aromatic groups, the local concentration of the chromophore is high while its mean concentration is low. A combination of this chromophore distribution and an intense laser excitation results in interesting nonlinear photochemical behavior under appropriate experimental conditions. We have succeeded in demonstrating phenomena characteristic of polymers excited by a laser, which we summarize in the following sections. 

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