VADDYPALLY SHIVAIAH
Articles written in Journal of Chemical Sciences
Volume 114 Issue 2 April 2002 pp 107-114
Vaddypally Shivaiah Samar K Das
The compound (NH4)7[ VvO4W10VIV2VIO36]·ca.22H2O (1) has been synthesized from an aqueous ammonium acetate buffer (pH 4) containing sodium vanadate, sodium rungstate_and sodium dithionite. Compound (1) crystallizes in a cubic space group
Volume 117 Issue 3 May 2005 pp 227-233
Vaddypally Shivaiah Samar K Das
Synthesis and structural characterization of a polyoxometalate compound Na3(H2O)6 [Al(OH)6Mo6O18]-2H2O (1) have been described. Compound
Volume 123 Issue 2 March 2011 pp 229-239
Polyoxometalates: Toward new materials
A Srinivasa Rao T Arumuganathan Vaddypally Shivaiah Samar K Das
This article describes an account of some of our polyoxometalate (POM)-based research, we have been doing in our laboratory last several years. There are several well-defined POM cluster anions, that are structurally characterized. We have chosen Anderson-type of heteropolyanion [Al(OH)6Mo6O18]$^{3−}$ and explored its linking propensity in different dimensions using `s', `d' and `f' block elements as linkers.We have demonstrated how a lanthanide linker provides a new pathway in forming a two-dimensional linked {As8V14} system [{Ln(H2O)6}2As8V14O42(SO3)]$_n$.8nH2O, that is derived from discrete {As8V14} cluster containing compound (NH4)6[As8V14O42(SO3)]. A polyoxometalate compound has been described in which a reduced tungstovanadate-heteropolyanion clusters get linked via capped V = O groups into one-dimensional chains. All these systems have already been reported elsewhere. The last portion of this article will be described by a new system [3-ampH]6[V10O28]$\cdot$2H2O having discrete molecular structure and extended supramolecular structure.
Volume 126 Issue 5 September 2014 pp 1525-1533 Special issue on Chemical Crystallography
Vaddypally Shivaiah Tanmay Chatterjee Samar K Das
One-dimensional isomorphous inorganic polymers containing Anderson type heteropoly anion as a basic building unit, namely [La(H2O)7Cr(OH)6Mo6O18]$_n$·4nH2O (
Volume 130 Issue 4 April 2018 Article ID 0037
VADDYPALLY SHIVAIAH N TANMAYA KUMAR SAMAR K DAS
Diffusion of piperidine and pyridine into an acidified aqueous solution of Na2MoO4, yield compounds [(pipH)4][Mo8O26] · 4H2O (pip = piperidine = C5H11N) (1) and [(pyH)4][Mo8O26] (py =pyridine = C5H5N) (2), respectively. Compound 1 possesses supramolecular 3-D network and the relevant connectivity pattern generates channels of approximate dimensions of 10.76 × 11.57´A° 2, in which the piperidinium cations are located as guests. Multidimensional supramolecular frameworks (3-D in compound 1 and 2-D layer type of network in compound 2) have been made possible, as the organic cations and polyoxometalate (POM) anions are glued together by significant hydrogen bonding interactions. The synthesis of compounds 1 and 2 provides a unique ‘gas–liquid’ synthetic route in POM chemistry that result in organic–inorganic hybrid materials with structural diversities. This synthetic approach, first time in POM chemistry, can be described as a potential bag filter for volatile organic amines.
Volume 135, 2023
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