Synthesis of novel photochromic methyl cyanoacetate-condensed fulgide derivatives

Kose M., Orhan E., Buyukgungor O.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, vol.188, no.2-3, pp.358-363, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 188 Issue: 2-3
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jphotochem.2006.12.036
  • Journal Name: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.358-363
  • Keywords: photochromism, fulgides, methyl cyanoacetate, quantum efficiency, ANHYDRIDE, SUBSTITUENTS, MEMORIES
  • Ondokuz Mayıs University Affiliated: No

Abstract

New thermally irreversible photochromic methyl cyanoacetate-condensed fulgide derivatives were prepared and their photochromic properties were investigated. Coloured form of methyl cyanoacetate-condensed derivatives C-4(a-d) show large bathochromic shifts of their long wavelength absorption bands compared to the coloured form of corresponding fulgides Z-1(a-d). Solvent effects on the compound ZZ-4a and its ring-closed form C-4a were investigated. The polarity of the solvent caused a bathochromic shift of both coloured and uncoloured forms. (C) 2007 Elsevier B.V. All rights reserved.