In this paper, we outline the photochemical and spectroscopic properties of a new class of light-sensitive polymers obtained as a result of poly(styrene-co-2-bromoethyl methacrylate) and chloromethylated polystyrene modification by attaching a pendent hydroxycinnamate group. These specific cinnamates after addition of tertiary amine display characteristic dual fluorescence. Dual emission is attributed to the presence of two different forms of phenol group. Analysis of the kinetic data of the formation of the ionized form indicates a substantial difference between the polymeric and monomeric systems. Simultaneously, the addition of tertiary amine causes quenching of the singlet excited state. As a result, a sharp decrease in the sensitivity is observed. It is also shown that hydroxycinnamates are sensitive in both the neutral and ionized forms of the light-sensitive group. Based on experiments, a kinetic scheme for the processes taking place during irradiation is proposed.
Посилання на статтю:
Cinnamates VI. Light-sensitive polymers with pendent o-, m- and p-hydroxycinnamate moieties / Franciszek Scigalski, Maria Toczek and Jerzy Poczkowski // Polymer. – 1994. – Vol 35. – P. 692-698.