S. Ayyappan

Nanoparticles of Ag, Au, Pd, and Cu produced by alcohol reduction of the salts

Nanoparticles of Ag, Au, Pd, and Cu have been prepared by the reduction of their salts by ethyl alcohol under refluxing conditions in the presence of olyvinylpyrrolidone (PVP). In the case of Au and Cu, it was necessary to use magnesium metal as a catalyst during the reduction. The nanoparticles are in the 5-35 nm range in the case of Ag, Au, and Pd, but there is considerable agglomeration in the case of Cu even in the presence of PVP.

Nanoparticles of nickel and silver produced by the polyol reduction of the metal salts intercalated in montmorillonite

Nickel (II) and silver (I) have been exchanged to varying extents in the interlayers of montmorillonite by taking nickel acetate hydrate and silver nitrate as startin, 0 materials. In situ reduction with boiling ethylene glycol gives rise to nanoparticles of nickel and silver. The nature of the metal particles has been examined by X-ray diffraction and transmission electron microscopy; magnetization measurements were also employed in the case of Ni particles. While nanoparticles in the diameter range of 8-45 nm are produced by the reduction of the deintercalated nickel acetate or silver nitrate, small metal clusters of 4-5 \AA remain inside the clay giving rise to a d (001) reflection of 14-15 \AA in the reduced metal-montmorillonite samples.

A simple method of hydrogen insertion in transition metal oxides to obtain bronzes

Reaction of

Structure and properties of oxyanion derivatives of 123 cuprate superconductors: Effect of substitution of carbonate and nitrate ions in the Cu(1) position of YBaSrCu3O7−δ

WO_3

Oxyanion derivatives of cuprate superconductors: Superconducting thallium cuprate oxysulfate, Tl0.5Pb0.5Sr4Cu2(SO4)Oy☆

,

Mesostructured lamellar chromium oxide

MoO_3

A simple ladder tin phosphate and its layered relative

and

Tin(II) oxalates synthesized in the presence of structure-directing organic amines : Members of a potentially vast class of new open-framework and related materials

V_2O_5

Layered tin (II) oxalates possessing large apertures

with alcohols or glycols is shown to yield hydrogen bronzes of the oxides. Cubic and tetragonal

Synthesis And Structural Characterization Of A Chiral Open-Framework Tin(Ii) Phosphate, [Cn3h6][Sn4p3o12] (Guan-Snpo)

H_XWO_3