Jump to main content
Jump to site search

Issue 8, 2011
Previous Article Next Article

Photochromic and photophysical properties of new benzo- and naphtho[1,3]oxazine switches

Author affiliations

Abstract

A new set of photochromic hindered benzo- and naphtho[1,3]oxazines with fast switching speed between the closed and open form were synthesised. Laser excitation of these uncoloured molecules (with ∼10 ns FWHM pulses) leads to the cleavage of the C–O bond and opening of the oxazine ring in less than 20 ns, generating a thermally unstable coloured zwitterionic species that reverts in few nanoseconds to the initial oxazine closed form. For these derivatives a detailed spectroscopic and photophysical study was undertaken involving measurements of absorption and phosphorescence spectra, phosphorescence quantum yields (ϕPh), phosphorescence lifetimes (τPh), triplet energies (ET), singlet oxygen (ϕΔ) and ring opening photoreaction (ϕ) quantum yields, reisomerization kinetics and the zwitterionic form lifetime. A remarkable solvent effect on the lifetime of the photogenerated species was observed.

Graphical abstract: Photochromic and photophysical properties of new benzo- and naphtho[1,3]oxazine switches

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Feb 2011, accepted on 09 May 2011 and first published on 27 Jun 2011


Article type: Paper
DOI: 10.1039/C1PP05067B
Citation: Photochem. Photobiol. Sci., 2011,10, 1346-1354
  •   Request permissions

    Photochromic and photophysical properties of new benzo- and naphtho[1,3]oxazine switches

    Y. Prostota, P. J. Coelho, J. Pina and J. Seixas de Melo, Photochem. Photobiol. Sci., 2011, 10, 1346
    DOI: 10.1039/C1PP05067B

Search articles by author

Spotlight

Advertisements