Photoisomerization of indolinespirobenzopyran in anionic clay matrices of layered double hydroxides
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 4 (12) , 1907-1912
- https://doi.org/10.1039/jm9940401907
Abstract
Sulfonated indolinespirobenzopyran (SP–SO3 –) was intercalated into the Mg/Al or Zn/Al layered double hydroxides (LDHs) in the presence of toluene-p-sulfonic acid (PTS). The new intercalates exhibited reversible photoisomerization between SP–SO3 – and merocyanine (MC). The presence of PTS was critical for the reversible photoisomerization. MC was very stable and the rate constant of decolorization was –7S–1. SP interacted with non-polar portions between the layers although MC interacted with the polar interior surface of the LDH.Keywords
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