The fluorescence of polybenzyl
β Scribed by Bryan Ellis; P.G. White; R.N. Young
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 432 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0014-3057
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β¦ Synopsis
Polybenzyl, prepared by treating benzyl chloride with stamk chloride in the presence of air at room temperature, is fluorescent. The fluorescence and absorption spectra of this polybenzyl have been determined. From these spectral studies together with the reactions of polybenzyl with butyl lithium and sodium/potassium alloy, it has been established that the most probable fluorescent unit is a benzyl substituted 9 phenyl or 9:lO diphenyl anthracene. A possible mechanism is given for the formation of this fluorescent group via the formation of a carbonium ion of diphenyl methane type.
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Soluble polybenzyls were prepared by a catalytic electrophilic Friedel-Crafts type polycondensation between a,aΒΊ-dichloro-p-xylene and substituted (by an alkyl or an alkoxy side-chain) mesitylene. The inΓ½uence of the length of the side-chain on the solubility of the polymer was examined. The polymer
## Abstract Properties of some linear oligobenzyls corresponding to polybenzyl, poly(2,5βdimethylbenzyl), and poly(2,3,5,6βtetramethylβbenzyl) systems are correlated to those of relative polymers. From infrared and xβray diffraction data, evidence is found that magnified image oligomers tend to ass