Photochromism of spiropyrans and spirooxazines in the solid state: low temperature enhances photocoloration.

Chem Commun (Camb)

Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo, Japan.

Published: April 2010

AI Article Synopsis

  • This study shows that spiropyrans and spirooxazines, previously thought to be non-photochromic in solid form, actually exhibit photochromic properties at low temperatures.
  • Their ability to react to light improves significantly as the temperature decreases.
  • This finding challenges previous assumptions and could have implications for materials science and applications involving these compounds.

Article Abstract

In this study we have revealed that spiropyrans and spirooxazines, which have long been believed to be non-photochromic in the solid state, are generally photochromic in the solid state at least at low temperatures and that their photoreactivity increases greatly as the temperature is lowered.

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http://dx.doi.org/10.1039/b925514aDOI Listing

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