✦ LIBER ✦

Fluorescence of copolymers of 2-naphthyl methacrylate and methyl methacrylate

✍ Scribed by H. Boudevska; C. Brutchkov; H. Astroug

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 390 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90090-3

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✦ Synopsis

The fluorescence of a series of copolymers of 2-naphthyl methacrylate (2-NM) and methyl methacrylate (MMA) with various contents of 2-NM (obtained in chloroform, carbon tetracbloride and acetonitrile) was investigated. A linear dependence between the ratio of the excimer to monomer emission intensities (Io/IM) and the diad fraction (fn,) of 2-NM monomer units was established. The relationship between ID/1M andf,,'I, (I, = the mean sequence length of 2-NM units) fits a logarithmic curve. The results indicate that the excimer emission is determined mainly by the nearest neighbour naphthalene-containing monomer units in the copolymer chain. The copolymers obtained in acetonitrile have higher values of ID/IM than those obtained in chloroform and carbon tetrachloride. This difference is due to the higher content of mm-triads in copolymers from acetonitrile, confirmed by ~H-NMR analysis of the samples of poly(methyl methacrylate) formed from copolymers of 2-NM and MMA.

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