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The role of free volume in the twisted intramolecular charge transfer (TICT) emission of dimethylaminobenzonitrile and related compounds in rigid polymer matrices

✍ Scribed by Khader A. Al-Hassan; Tohru Azumi

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 323 KB
Volume: 146
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)85059-0

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✦ Synopsis

The amount offree volume present in a polymer matrix represents a driving force toward twisted intramolecular charge transfer (TICT) emission of pdimethylaminobenzonitrile (DMABN) and related compounds. The intensity of the TICT band for these compounds in PVC (poly(viny1 chloride), PVA (poly(viny1 alcohol)), PHEMA (poly(hydroxyethy1 methacrylate)) and PMMA (poly(methy1 methacrylate) ) was found to increase in this order, which is consistent with the increased free volume present in the same sequence. This rules out specific solute-solvent interactions as being responsible for the TICT emission in PVA polymer matrices.

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