We prepared Zn–Al layered double hydroxide (LDH) thin films intercalated with sulfonated 1,3′,3′-trimethyl-6-nitrospiro[2H-chromene-2,2′-indoline] anions (SP-SO3 −) by immersion of sol–gel derived amorphous Al2O3–ZnO thin films in hot water containing SP-SO3H. Extended interlayer spacing, in comparison to the Zn–Al LDH with carbonate anions, was observed after immersion in distilled water containing SP-SO3H at 60 °C for 30 min, indicating that we formed Zn–Al LDH films with SP-SO3 − directly on glass substrates. The merocyanine form of SP-SO3 − was shown by UV spectra to have stabilized in the hydroxide layers of LDH.
Research on Chemical Intermediates – Springer Journals
Published: Oct 10, 2009
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