Fluorescence of copolymers of 2-NAPHTHYL METHACRYLATE (cas 10475-46-4) and methyl methacrylate

Add time:08/01/2019    Source:sciencedirect.com

The fluorescence of a series of copolymers of 2-NAPHTHYL METHACRYLATE (cas 10475-46-4) (2-NM) and methyl methacrylate (MMA) with various contents of 2-NM (obtained in chloroform, carbon tetrachloride and acetonitrile) was investigated. A linear dependence between the ratio of the excimer to monomer emission intensities (ID/IM) and the diad fraction (fnn) of 2-NM monomer units was established. The relationship between ID/IM and fnn · In (In = 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 1H-NMR analysis of the samples of poly(methyl methacrylate) formed from copolymers of 2-NM and MMA.

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