Copper-aluminum hydrotalcite

Kantam, M. L., Arundhathi, R., Likhar, R R., and Damodara, D. 2009a. Reusable copper-aluminum hydrotalcite/rac-BINOL system for room temperature selective aerobic oxidation of alcohols. Arfv. Synth. Catal. 351(16) 2633-2637. 

Nanocopper(O) on alumina [Cu(0)/Al2O3] NPs were prepared by a simple procedure from copper aluminum hydrotalcite and shown to be an efficient catalyst for the acceptor- and oxidant-free dehydrogenation of alcohols and amines. 

Damodara D, Amndhathi R, Likhar PR. Copper nanoparticles firom copper aluminum hydrotalcite an efficient catalyst for acceptor- and oxidant-free dehydrogenation of amines and alcohols. Adv Synth Catal. 2014 356 189-198. 

Copper-aluminum hydrotalcite (3 1) (Cu/Al-HT (3 1)) promotes the cycloaddition of azides and alkynes, without any sacrificial reducing agents and ligands, because of its ability to stabilize Cu(I) [43]. 

Phenol hydroxylation over CoNiAl ternary fresh hydrotalcites yielded catechol and hydroquinionc with a preference to catechol. No other products were observed by GC indicating no transitory formation of p-bcnzoquinonc. This is in contrast to the results we have earlier reported for copper containing hydrotalcites (87, 105] where we observed both catechol and hydroquinone to significant levels, suggesting the nature of cations in the brucite-likc sheets in influencing the course of the reaction. Although both nickel and cobalt separately in a binary hydrotalcite with aluminum as trivalent cation showed no conversion of... 

Comparing this result to those obtained by Carrado et al. [19] on copper phtalocyanine tetrasulfonate, it is important to note that the same result was obtained for stochiometric amount of CuPcTs. Nevertheless for a CuPcTs concentration corresponding to twice that necessary to balance the charge created by aluminum in the hydrotalcite framework, Carrado et al. [19] obtained a perpendicular intercalated copper phtalocyanine complex with a doo3 reflection at 23 A. However, this component presented an unexpectedly low surface area of about 0.2 m /g. 

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