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Intercalation of iron(III) hexacyano complex in a Ni,Al hydrotalcite-like compound
Irene Carpani1, Mario Berrettoni, Marco Giorgetti
1Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, INSTM, UdR Bologna.
Abstract:
The product obtained by the intercalation of hexacyanoferrate(III) inside a Ni, Al hydrotalcite-like compound (Htlc) has been characterized using XRD, FT-IR, Raman, and XAS spectroscopy. The intercalation was carried out by anionic exchange of the originally existing chloride ions. The combined use of those techniques gave more insight on the insertion chemistry of Htlcs. Extended X-ray absorption fine structure spectra of the intercalated Htlc demonstrated that the native structure was stable during the iron complex insertion, whereas the exchange process occurred with a partial reduction of hexacyanoferrate(III). Both Raman and FT-IR spectroscopy pointed out the concomitant formation of K(2)NiFe(II)(CN)(6) and KNiFe(III)(CN)(6). The effect of aging on the intercalated product is also addressed.
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