Fluorescent photoswitching of a naphthopyran-benzimidazole dyad with high-degree fluorescent modulation within poly(methyl methacrylate) matrices

Shuangqing Wang, Yanling Si, Cuiyan Tong, Guang Wang, Bin Qi, Guochun Yang

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

A naphthopyran-bridge-benzimidazole dyad which exhibits both fluorescence and photochromism was synthesized and its fluorescence photoswitching was investigated. Irradiation with UV light induces the isomerization of the naphthopyran component to the corresponding merocyanine. The fluorescence of the dyad was switched reversibly between on and off upon UV irradiation and thermal bleaching of the naphthopyran. Using ultraviolet illumination a pattern was created on a polymethylmethacrylate doped film with the dyad. Thus either a non-destructive photoswitch or an image recording system becomes available. The measurement of redox potentials by cyclic voltammetry combined with electronic spectra and a molecular energy diagram of the individual naphthopyran and benzimidazole demonstrated that the transformation of naphthopyran induced energy and electron transfer from the fluorescent benzimidazole to the photochromic naphthopyran, a feature which was also supported by our DFT calculations.

Original languageEnglish (US)
Pages (from-to)1504-1512
Number of pages9
JournalOptical Materials
Volume35
Issue number8
DOIs
StatePublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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