Publications

Insertion of nickel nanoparticles in the interlayers of alpha-zirconium phosphate by the decomposition of the intercalated nickel acetate

A Three‐Dimensional Lead 2,6‐Dihydroxybenzoate with Channels

A lead 2,6‐dihydroxybenzoate of the formula Pb(C 14 H 10 O 8 ) ( I ) has been synthesized and characterized by X‐ray crystallography and spectroscopic techniques. (crystal data: monoclinic, space group = Cc (no. 9), a = 11.2155(2), b = 9.2942(2), c = 13.5112(3) Å, β = 96.510(1)°, V = 1399.31(5) Å 3 , Z = 4). This is the first three‐dimensional metal dihydroxybenzoate structure, comprising 3,6‐connected periodic net and having channels with the dimensions 3.8 × 3.8Å and 10.8 × 3.8Å. The coordination of the PbO 8 polyhedron is holodirected and the electron lone pair of the lead is, therefore, not manifested in I . It exhibits photoluminescence in the violet, green and red when excited at 240, 390 and 525 nm, respectively.

An indigenous cluster beam apparatus with a reflectron time-of-flight mass spectrometer

No abstract is provided for this article.

Satellites in the X-ray photoelectron spectra of transition-metal and rare-earth compounds

An attempt has been made at synthesis and in resolving some of the uncertainties related to the assignments of charge-transfer satellites in the X-ray photoelectron spectra of transition-metal and rare-earth compounds. New satellites are reported in the ligand core-hole spectra as well as in the metal core-level spectra of oxides of second- and third-row transition metals including rare earths. Satellites in the ligand levels and the metal levels tend to be mutually exclusive, a behaviour that can be understood on the basis of metal-ligand overlap. Systematics in the intensities and energy separations of satellites in the first-row transition-metal compounds have been examined in order to gain an insight into the nature of these satellites. A simple model involving the sudden approximation has been employed to explain the observed systematics in intensities of satellites appearing next to metal and ligand core levels on the basis of metal-ligand overlap.

Electron–Hole Asymmetry in the Rare-Earth Manganates: A Comparative Study of the Hole- and the Electron-Doped Materials

No abstract is provided for this article.

Urea route to coat inorganic nanowires, carbon fibers and nanotubes by boron nitride

A simple route involving urea as the nitrogen source has been employed to carry out boron nitride coating on carbon fibers, multi-walled carbon nanotubes and inorganic nanowires. The process involves heating the carbon fibers and nanotubes or inorganic nanowires in a mixture of H3BO3 and urea, followed by a heat treatment at 1000°C in a N2 atmosphere. We have been able to characterize the BN coating by transmission electron microscopy as well as X-ray photoelectron spectroscopy. The urea decomposition route affords a simple method to coat boron nitride on one-dimensional nanostructures.

Magic Nuclearity Giant Clusters of Metal Nanocrystals Formed by Mesoscale Self-Assembly

No abstract is provided for this article.

Biferroic YCrO 3

YCrO3, which has a monoclinic structure, shows weak ferromagnetism below 140 K (TN) and a ferroelectric transition at 473 K accompanied by hysteresis. We have determined the structure and energetics of YCrO3 with ferromagnetic and antiferromagnetic ordering by means of first-principles density functional theory calculations, based on pseudopotentials and a plane-wave basis. The noncentrosymmetric monoclinic structure is found to be lower in energy than the orthorhombic structure, supporting the biferroic nature of YCrO3.

An Investigation of Well-Characterized Small Gold Clusters by Photoelectron Spectroscopy, Tunneling Spectroscopy, and Cognate Techniques

No abstract is provided for this article.

Multiferroic and Magnetoelectric Oxides: The Emerging Scenario

Multiferroics were considered to be rare because magnetism and ferroelectricity require entirely different criteria for the materials. Several multiferroic oxides have, however, been discovered in the past few years by virtue of novel operating mechanisms, the most effective one being ferroelectricity driven by magnetism itself. Many such oxides where the magnetic and electric order parameters interact also exhibit magnetoelectric or magnetodielectric properties. In this Perspective, properties of manganites, ferrites, and other monophasic multiferroic oxides with spin-induced electric polarization are described. Multiferroic properties arising from charge ordering are examined. The present status of BiMnO3, which is an unusual example of a ferromagnetic-ferroelectric, is presented. Recent findings suggest that it is likely that many more multiferroic and magnetoelectric oxide materials exhibiting magnetically induced ferroelectricity will be found in the future.

Superconductivity in the 100–120 K region in oxides of the Tl-Ca-Ba-Cu-O system

No abstract is provided for this article.

Beneficial effect of Re doping on the electrochemical HER activity of MoS₂ fullerenes

The combined synergistic effect of Re doping and the IF structure on MoS₂ for enhancing the electrochemical hydrogen evolution reaction.

Nb3VS6 Nanosheets: A Ternary Metal Sulfide that Achieves Outstanding Ampere‐Level Current Density for Alkaline Electrochemical HER Activity

The electrochemical generation of green hydrogen as an alternative energy source requires higher energy inputs and suffers from low current output using non‐noble metal‐based catalysts. In this article, Nb3VS6 nanosheets have been utilized as catalysts to investigate the electrochemical hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in an alkaline medium. Nb3VS6 nanosheets demonstrated considerable effectiveness as catalysts and strong activity, showing ampere‐level current densities and stability in the working potential range towards the electrochemical production of hydrogen. Nb3VS6 nanosheets exhibit a high current density of 1.5 A cm‐2 towards HER at an overpotential of 650 mV. Furthermore, its bifunctionality achieved an impressive current density of 1.8 A cm‐2 at a potential of 2.9 V in a full‐cell configuration.

X-ray spectroscopic study of chromium, nickel, and molybdenum compounds

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray spectroscopic study of chromium, nickel, and molybdenum compoundsA. Manthiram, P. R. Sarode, W. H. Madhusudan, J. Gopalakrishnan, and C. N. R. RaoCite this: J. Phys. Chem. 1980, 84, 17, 2200–2203Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inissue 1 August 1980https://pubs.acs.org/doi/10.1021/j100454a018https://doi.org/10.1021/j100454a018research-articleACS PublicationsRequest reuse permissionsArticle Views223Altmetric-Citations30LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

The First Amine‐Templated Layered Metal Selenates

Although a few open‐framework metal sulfates and selenites have been synthesized and characterized recently, it has not been possible to prepare the corresponding selenates, probably because of the instability of the +6 oxidation state of Se in alkaline media. We have been able to synthesize, for the first time, organically templated open‐framework rare earth selenates with the general formula 0.5[C 2 N 2 H 10 ][Ln(H 2 O) 2 (SeO 4 ) 2 ] ( I ) (Ln = La, Nd or Pr) and 0.5[C 4 N 2 H 14 ][La(SeO 4 ) 2 ]·0.5H 2 O ( II ), under hydrothermal conditions in an acidic medium. Crystal data: I (Ln = La): triclinic, space group = P $\bar 1$ , M r = 491.91, a = 7.0105(8) Å, b = 7.3772(9) Å, c = 9.526(1) Å, α = 82.014(2), β = 84.514(2), γ = 84.247(2)°, V = 483.76(1) Å 3 , Z = 2; II : triclinic, space group = P $\bar 1$ , M r = 478.91, a = 5.94(2), b = 7.408(3), c = 11.048(2) Å, α = 86.899(2), β = 75.971(1), γ = 79.456(2)°, V = 463.7(2) Å 3 , Z = 4. Being the first report of complex layered selenates, it is likely to stimulate efforts to synthesize other novel open‐framework structures making use of the selenate ion as the building unit. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

ChemInform Abstract: Superconductivity in Modulation-Free BiPbSr2Ln1-xCaxCu2O8 (Ln: Y or Rare Earth).

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

International Union of Materials Research Societies

No abstract is provided for this article.

Physical chemistry of high-temperature oxide superconductors

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical chemistry of high-temperature oxide superconductorsT. V. Ramakrishnan and C. N. R. RaoCite this: J. Phys. Chem. 1989, 93, 11, 4414–4422Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https://doi.org/10.1021/j100348a010Request reuse permissionsArticle Views186Altmetric-Citations34LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) Get e-Alerts