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Monodispersed and Stable Nano Copper(0) from Copper‐ Aluminium Hydrotalcite: Importance in CC Couplings of Deactivated Aryl Chlorides
Author(s) -
Arundhathi Racha,
Damodara Dandu,
Mohan Kakita Veera,
Kantam Mannepalli Lakshmi,
Likhar Pravin R.
Publication year - 2013
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.201201007
Subject(s) - hydrotalcite , copper , chemistry , catalysis , inorganic chemistry , aluminium , metal , aryl , decarboxylation , xanes , organic chemistry , spectroscopy , alkyl , physics , quantum mechanics
A simple one‐step approach for the preparation of highly monodispersed nano copper(0) stabilized on alumina [Cu(0)/Al 2 O 3 ] by thermal reduction of copper‐aluminium hydrotalcite (Cu‐Al HT) under a hydrogen atmosphere is described. The transformation of Cu‐Al HT to Cu(0)/Al 2 O 3 occurrs via dehydroxylation of divalent and trivalent metal hydroxides and decarboxylation of carbonate anions present in the interlayers of hydrotalcite, as confirmed by XPS, XANES, XRD and TEM analysis. Cu(0)/Al 2 O 3 nano composites were used as an efficient catalyst in the CC coupling of deactivated aryl chlorides. The high efficiency and reusability exhibited by Cu(0)/Al 2 O 3 outline its potential as an alternative over traditional noble metal‐based catalysts in CC coupling reactions.