Spectroscopic and theoretical investigation of capillary-induced keto-enol tautomerism of phenacyl benzoylpyridinium-type photoinitiators

Yonet N., BICAK N., Yurtsever M., YAGCI Y.

POLYMER INTERNATIONAL, vol.56, no.4, pp.525-531, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 4
  • Publication Date: 2007
  • Doi Number: 10.1002/pi.2161
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.525-531
  • Istanbul Technical University Affiliated: No


Phenacyl benzoylpyridinium (PBP) salts are effective photoinitiatiors for cationic polymerization. In this study, it is shown that PBP salts are stable in their keto forms, and undergo a reversible keto-enol tautomerization reaction when a capillary action is applied. Spectroscopic and theoretical methods are used to explain the existence of the enol forms in the capillary tube. (C) 2006 Society of Chemical Industry.