Add time:07/18/2019         Source:sciencedirect.com

Intramolecular excimer formation of poly(1-naphthylmethyl methacrylate) and a series of 1-naphthylmethyl methacrylate/methyl methacrylate copolymers has been investigated using steady-state fluorescence spectroscopy and the time-correlated single-photon counting technique. A linear relationship between the ratio of excimer to monomer emission intensities and the copolymer composition was established. The monomer fluorescence decays in these copolymers could be characterized by sums of exponential terms (single, double or triple), depending upon composition, while the excimer decays were poorly described by either single- or double-exponential fits. Some unusual phenomena for the photophysical processes in this polymer system are presented and discussed.

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