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Published on: June 16, 2014
Isolation of mixed valence charge-neutral Ag12, and dicationic Ag10 nano-clusters stabilized by
Maria Francis1, Asutosh Patra1, Farsana Abdul Salam1
1Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517619, India. roy.sudipta@iisertirupati.ac.in.
Abstract:
Cyclic alkyl(amino) carbene (cAAC)-supported phosphaalkenides (cAACP)- have been employed as ligands for the isolation of two atomically precise mixed valence paramagnetic AgI/012Cl3, and AgI/010, nano-clusters [(Me2-cAACP)6Ag12Cl3] (2), and [(Me2-cAACP)6Ag10](NTf2)2 (4). 2 and 4 have been structurally characterized by single-crystal X-ray diffraction revealing the presence of three Ag0 atoms, nine AgI ions (2); and two Ag0 atoms, eight AgI ions (4), respectively. The clustering inorganic unit Ag12Cl3 in 2 has been found to be surrounded by six mono-anionic μ3-cAACP moieties having 3-bar symmetry. 2 and 4 have been studied by cyclic voltammetry, UV-vis, ESI-MS, XPS, EPR spectroscopy, and DFT calculations.
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