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A. Bajorek, J. Kabac, J. Pączkowski

Application of styrylquinolinium dyes as spectroscopic probes in radical polymerization process

Polimery 2007, No 7/8, 556


Summary

The results of investigations concerning the organic salts compounds of D-π-A+X- type consisting of organic alkylquinolinium cation (electron acceptor A+), bonded via π electrons system with N,N-dialkylaniline group (electron donor D), and inorganic iodide anion (X-) (Table 1) were discussed. The effect of environment polarity on the spectroscopic properties of such salts used as fluorescent probes was evaluated. Absorption (Fig. 1) and fluorescence spectra (Fig. 2-4) in the solvents differing in polarity: tetrahydrofuran (THF) and dimethylformamide (DMF) were recorded. The changes in the fluorescent spectra of the compounds tested during thermally initiated methyl methacrylate polymerization (Fig. 5-7) were investigated. This way their usability for polymerization process monitoring, as fluorescent probes, has been determined. Comparatively, a relative parameter called probe sensitivity (Table 2) was introduced.


Key words: fluorescent probes, styrylquinolinium dyes, radical polymerization, relative sensitivity


e-mail: agab@chem.atr.bydgoszcz.pl


A. Bajorek, J. Kabac, J. Pączkowski

Application of styrylquinolinium dyes as spectroscopic probes in radical polymerization process