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The polymerization of the intercalated aniline ions was studied in three different clays, Swy2-montmorillonite (MMT), synthetic mica-montmorillonite (Syn1) and pillarized Swy2-montmorillonite (PILC). PANI is formed between the MMT and Syn1 clay layers, being confirmed by the shift of d 001 peak in the X-ray pattern. X-ray Absorption near to Si K edge (Si K XANES) data show that the structures...
In situ resonance Raman spectroscopy was employed to correlate the blue, yellow, purple, and orange-brown colors with the organic species that appear in aqueous suspensions of benzidine and montmorillonite clay (BZ–MMT system) at several pHs. From pH 3 to 9, the radical cation of BZ (BZ + ), which is responsible for the blue suspension color (λ max ∼600nm), is the predominant species...
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