Prof. C.N.R. Rao's Publications: Recent submissions

Now showing items 461-480 of 892

Structural Aspects of High-Temperature Cuprate Superconductor

Rao, C N R; Raveau, B (American Chemical Society, 1989-03)

High-temperature superconductivity constitutes the most sensational discovery of recent times. Since these new superconductors are complex metal oxides, chemistry has had a big role to play in the investigations. For the ...
Physical chemistry of high-temperature oxide superconductors

Ramakrishnan, T V; Rao, C N R (American Chemical Society, 1989-06-01)
Experimental Electronic Structures of Complexes of SO2: An Electron Spectroscopic Study

Pradeep, T; Sreekanth, C S; Hegde, M S; Rao, C N R (American Chemical Society, 1989-07-05)

He I photoelectron spectra of gas-phase complexes formed by SO2 with the electron donors trimethylamine, triethylamine, diethyl ether, and diethyl sulfide have been recorded and bands assigned to the different orbitals ...
Superconducting (1:1:2:2)-type layered cuprates of the formula TlCA1-xLxSr2Cu2Oy (L=Y or rare-earth element)

Rao, C N R; Ganguli, A K; Vijayaraghavan, R (American Physical Society, 1989-08-01)

The TlCa1-xLxSr2Cu2Oy (L=Y or a rare earth element) series of cuprates possessing a (1:1:2:2)-type layered structure exhibit superconductivity in the 60–90-K region. The TlCa1-xLxSr2Cu2Oy (x=1) series of cuprates also ...
Investigation of novel cuprates of the TlCa1-xLnxSr2Cu2O7- δ (Ln=rare earth) series showing electron- or hole-superconductivity depending on the composition

Vijayaraghavan, R; Ganguli, A K; Vasanthacharya, N Y; Rajumon, M K; Kulkarni, G U; Sankar, G; Sarma, D D; Sood, A K; Narayana, Chandrabhas; Rao, C N R (IOP Publishing Ltd, 1989)

Superconductivity in cuprates of the general formula TlCa1-xLnxSr2Cu2O7+ delta has been investigated as a function of Ln and x. Compositions with 0.25<or=x<or=0.8 are superconducting for all Ln with Tc in the range 60-90 ...
Superconducting cuprates of the series Bi2Ca1-xLnxSr2Cu2O8+ δ (Ln=rare earth or Y)

Rao, C N R; Nagarajan, R; Vijayaraghavan, R; Vasanthacharya, N Y; Kulkarni, G U; Rao, G Ranga; Umarji, A M; Somasundaram, P; Subbanna, G N; Raju, A R; Sood, A K; Narayana, Chandrabhas (IOP Publishing Ltd, 1990-05)

A systematic investigation of the properties of the series Bi2Ca1-xLnxSr2Cu2O8+ delta (Ln-rare earth or Y) of superconducting cuprates has been carried out by employing a variety of techniques. In these cuprates, the a and ...
Role of the Cu-O charge-transfer energy in the superconductivity of cuprates: Evidence from Cu 2p core-level spectroscopy and theory

Rao, C N R; Rao, G Ranga; Rajumon, M K; Sarma, D D (American Physical Society, 1990-07-01)

Based on Cu 2p core-level spectroscopy and theoretical calculations, it has been demonstrated that the Cu-O charge-transfer excitation energy which determines the Cu 2p satellite intensity also plays a crucial role in the ...
A Study of Strong Metal-Support Interaction Based on an Electron Spectroscopic Investigation of Nitrogen Adsorption on Simulated Ni/TiO2, Ni/Al2O3 and Related Catalyst Surfaces

Rao, G Ranga; Rao, C N R (American Chemical Society, 1990-10-04)

Adsorption of nitrogen on Ni/TiO{sub 2}, Ni/Al{sub 2}O{sub 3}, Ni/Al, Ni-Ti alloy, TiO{sub 2}, and other surfaces prepared in situ in an electron spectrometer has been investigated by X-ray and UV photoelectron spectroscopy ...
Nature and stability of the ‘‘60-K superconducting phase’’ in the YBa2Cu3O7-δ system

Rao, C N R; Nagarajan, R; Ganguli, A K; Subbanna, G N; Bhat, S V (American Physical Society, 1990-10-01)

Based on electron microscopy, nonresonant microwave absorption, electron paramagnetic resonance, and other studies, it is shown that in the YBa2Cu3O7-δ system, compositions with δ=0.0– 0.20, 0.25, and 0.5 are stable and ...
A Novel FeC60 Adduct in the Solid State

Pradeep, T; Kulkarni, G U; Kannan, K R; Rao, C N R (American Chemical Society, 1992-03-11)
Comment on "Variation of Cu-O charge-transfer energies in YBa2Cu3O7-x thin films studied by photoemission spectroscopy"

Rao, C N R; Santra, A K; Sarma, D D (American Physical Society, 1992-05-01)

It is pointed out that the change in the oxidation state of Cu in YBa2CU3O7-x with increasing x vitiates the trend in the Cu(2p) satellite intensity and hence the Cu-O charge-transfer energy. When Y is partly replaced by ...
Electron Donor-Acceptor Complexes of the Fullerenes C60 and C70 with Amines

Seshadri, Ram; Dsouza, Francis; Krishnan, Varadachari; Rao, C N R (Chemical Society Japan, 1993-02)

Based on electronic absorption spectroscopy, C60 is found to form complexes with aromatic amines with an enthalpy of association in the range 9-16 kJ mol-1. Interaction of C70 with the amines is negligible. Cyclic voltammetric ...
Cyclic acetate dimers formed by C–H···O hydrogen bonds in an open-framework zinc phosphate-acetate

Ayi, Ayi A; Choudhury, Amitava; Natarajan, Srinivasan; Rao, C N R (Royal Society of Chemistry, 2000)

A novel three-dimensional zinc phosphate-acetate, formed by acetate dimers with C–H···O bonds, has been synthesized for the first time under mild conditions.
Properties of a mixed-valent iron compound with the kagome lattice

Rao, C N R; Paul, Geo; Choudhury, Amitava; Sampathkumaran, E V; Raychaudhuri, Arup K; Ramasesha, S; Rudra, I (American Physical Society, 2003-04-01)

An organically templated iron sulfate of the formula [HN(CH2)(6)NH][(FeFe2F6)-Fe-III-F-II(SO4)(2)].[H3O] possessing the kagome lattice has been prepared and characterized by single-crystal crystallography and other techniques. ...
Chemistry of Materials : A Letter to a Young Friend

Rao, C N R (Indian Academy Of Sciences, 2009)
A new route for the synthesis of open-framework metal phosphates using organophosphates

Neeraj, S; Forster, P M; Rao, C N R; Cheetham, A K (Royal Society of Chemistry, 2001-12-21)

Use of tributylphosphate, an organophosphate, as the phosphorus source in place of phosphoric acid, has enabled the synthesis of several new open-framework zinc(II) and cobalt(ii) phosphates, under solvothermal conditions.
A novel open-framework zinc phosphate with intersecting helical channels

Neeraj, S; Natarajan, Srinivasan; Rao, C N R (Royal Society of Chemistry, 1999-01-21)

A new open-framework zinc phosphate, possessing two interpenetrating 8-membered helical channels, has been synthesized under mild hydrothermal conditions.
Direct evidence of phase segregation and magnetic-field-induced structural transition in Nd0.5Sr0.5MnO3 by neutron diffraction

Ritter, C; Mahendiran, R; Ibarra, M R; Morellon, L; Maignan, A; Raveau, B; Rao, C N R (American Physical Society, 2000-04-01)

We present direct evidence of die phase segregation and magnetic-field-induced structural transition in Nd0.5Sr0.5MnO3 as proposed earlier [R. Mahendiran et al., Phys. Rev. Lett. 82, 2191 (1999)] for the collapse of the ...
Mo1-xWxS2 nanotubes and related structures

Nath, M; Mukhopadhyay, K; Rao, C N R (Elsevier Science BV, 2002-01-30)

(NH4)(2)MoS4 and (NH4),WS4 form solid solutions over the entire composition range. Nanotubes of Mo1-xWxS2, solid solutions have been prepared by employing these solid solutions precursors. Thus, the thermal decomposition ...
New Method of Purification of Carbon Nanotubes Based on Hydrogen Treatment

Vivekchand, S R C; Govindaraj, A; Seikh, Md Motin; Rao, C N R (American Chemical Society, 2004-05-03)

A novel method for the purification of single-walled and multiwalled carbon nanotubes is described. The method involves acid washing followed by hydrogen treatment in the 700-1000degreesC range. While acid washing dissolves ...

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