2006: Recent submissions

Now showing items 1-20 of 197

Cyclic oligofurans: one-pot synthesis of 30 pi and 40 pi expanded porphyrinoids

Reddy, J S; Mandal, S; Anand, V G (American Chemical Society, 2006)

Acid-catalyzed condensation of furan and pentafluorobenzaldehyde yielded conjugated macrocycles with six and eight furan rings. They represent systems similar to annulenes with 30 d and 40 d electrons. From their structural ...
Cyclic Oligofurans: One-Pot Synthesis of 30π and 40π Expanded Porphyrinoids

Reddy, J S; Mandal, S; Anand, V G (American Chemical Society, 2006-11-23)

Acid-catalyzed condensation of furan and pentafluorobenzaldehyde yielded conjugated macrocycles with six and eight furan rings. They represent systems similar to annulenes with 30π and 40π electrons. From their structural ...
Ion Imprinted Polymer based Ion-selective Electrode for the Trace Determination of Dysprosium(III) Ions

Prasad, K; Kala, R; Prasada Rao, T; Naidu, G R K (Elsevier, 2006-04-27)

Ion-selective electrode (ISE) was designed by dispersing the dysprosium(III) IIP particles in 2-nitrophenyloctyl ether plasticizer and then embedded in polyvinyl chloride matrix. The ISE shows a Nernstian response for ...
Elastic Properties of Ca5-xAxNb2TiO12 (A = Mg, Zn) Microwave Ceramics

Vimala George; Philip, J; Bijumon, P V; Sebastian, M T (Elsevier, 2006-04-13)

Microwave dielectrics in Ca5−xAxNb2TiO12 (A = Mg, Zn) system have been prepared for different values of x by conventional solid-state ceramic route. The elastic properties of the ceramics were investigated as a function ...
Flux Pinning Properties of Rare Earth Modified (Bi, Pb)-2212 Superconductors

Biju, A; Abhilash Kumar, R G; Aloysius, R P; Syamaprasad, U (IOP Publishing, 2006)

The flux pinning properties of (Bi, Pb)-2212 superconductors modified by the addition of rare earth (RE) elements La, Gd and Yb with varying concentrations are studied. Samples were prepared by a conventional solid state ...
Metal Ion-imprinted Polymers—Novel Materials for Selective Recognition of Inorganics

Prasada Rao, T; Kala, R; Sobhi Daniel (Elsevier, 2006-09-25)

Ion-imprinted polymers (IIPs) are recently identified nano-porous polymeric materials which on leaching the imprint ion can rebind, sense or transport (when cast as membranes) selectively the target analyte in presence of ...
Regioselective Synthesis of Novel 7-5-8-Fused Oxabridged Tricyclic Molecules via Consecutive Dipolar Cycloaddition of Pentafulvenes with 3-Oxidopyrylium Betaines

Syam Krishnan, K; Suresh, E; Saumini Mathew; Radhakrishnan, K V (Thieme, 2006)

Pentafulvenes undergo consecutive dipolar cycloadditions with various substituted oxidopyrylium betaines resulting in the formation of a new class of structurally interesting 7-5-8-fused oxabridged tricyclic molecules.
Microwave Dielectric Properties of New Pyrochlore Type Oxides: Pb3R3Ti7Nb2O26.5 (R = Y, Pr, Nd, Gd or Dy)

Prabhakar Rao, P; Deepthi, N R; Ravindran Nair, K; Peter Koshy; Vaidyan, V K (Elsevier, 2006-03-15)

The microwave dielectric properties of new pyrochlore type oxides: Pb3R3Ti7Nb2O26.5 (R = Y, Pr, Nd, Gd or Dy) have been presented in this paper. These compounds have cubic pyrochlore type structure. Microstructure of the ...
CAN-Mediated Oxidative Addition of 1,3-Dicarbonyl Compounds to Methylenecyclopropanes: A Facile Synthesis of Spirocyclopropyl Dihydrofurans

Vijay Nair, G; Suja, T D; Kishor Mohanan (Thieme, 2006)

1,3-Dicarbonyl compounds react with methylenecyclopropanes by oxidation with CAN to give spirocyclopropyl dihydrofuran derivatives in good yields.
A Novel Three-component Reaction of Triphenylphosphine, DMAD, and Electron-deficient Styrenes: Facile Synthesis of Cyclopentenyl Phosphoranes

Vijay Nair, G; Ani Deepthi; Beneesh, P B; Suresh, E (Thieme, 2006)

The zwitterion formed from triphenylphosphine and DMAD adds to electron-deficient styrenes to form stable cyclopentenyl phosphoranes. This is the first example of such a zwitterion in which the phosphine is incorporated ...
A Convenient Synthesis of 2,2-Diarylcyclobutanones by Cerium (IV) Ammonium Nitrate (CAN) Mediated Oxidation of Methylenecyclopropanes (MCPs)

Vijay Nair, G; Suja, T D; Kishor Mohanan (Thieme, 2006)

Oxidative ring expansion of methylenecyclopropanes with CAN under oxygen atmosphere was investigated. A facile conversion affording 2,2-diarylcyclobutanones occurred in good yields.
Synthesis, Characterization, and Luminescence Properties of Eu3+ 3-Phenyl-4- (4-toluoyl)-5-isoxazolonate Based Organic-Inorganic Hybrids

Lima, P P; Junior, S A; Malta, O L; Carlos, L D; Sá Ferreira, R A; Rani, P; Reddy, M L P (Wliey InterScience, 2006-10)

Organic-inorganic hybrids incorporating Eu(TPI)3·3H2O or Eu(TPI)3·2TOPO [where TPI and TOPO stand for 3-phenyl-4-(4-toluoyl)-5-isoxazolone and tri-n-octylphosphane oxide, respectively] were synthesized either by acetic ...
Synthesis and Characterization of New Azobenzenesulfonic Acids Doped Conducting Polyaniline

Jayakannan, M; Anilkumar, P; Sanju, A (Elsevier, 2006-10)

New azobenzene sulfonic acid dopants were synthesized by diazotized coupling reaction of sulphanilic acid diazonium salt with commercially available raw materials such as phenol, m-cresol and 4-phenylphenol. The structures ...
Superconductivity and Flux Pinning in Dy Added (Bi, Pb)-2212 Superconductor

Biju, A; Sarun, P M; Aloysius, R P; Syamaprasad, U (IOP Publishing, 2006-10)

The changes in phase evolution, structural, superconducting and flux pinning properties of (Bi, Pb)-2212 superconductor due to the addition of the rare earth Dy have been studied. Bulk polycrystalline samples were used for ...
Structural and Superconducting Properties of Bi1.7Pb0.4Sr2−xGdxCa1.1Cu2.1Oy System

Biju, A; Abhilash Kumar, R G; Aloysius, R P; Syamaprasad, U (Elsevier, 2006-11-15)

The effect of substitution of the rare earth ion Gd at Sr site of (Bi, Pb)-2212 superconductor has been studied by varying Gd in the stoichiometric level. The samples were prepared by solid-state synthesis route in the ...
Magnetic-Fluorescent Nanocomposites for Biomedical Multitasking

Corr, S A; O' Byrne, A; Gun'ko, Y K; Ghosh, S K; Brougham, D F; Mitchell, S; Volkov, Y; Prina-Mello, A (Royal Society of Chemistry, 2006)

Fluorescent magnetite nanocomposites based on magnetic nanoparticles, a polyhedral octaaminopropylsilsesquioxane and a porphyrin derivative have been prepared. The intracellular uptake of the nanocomposites by macrophage ...
Lewis Acid Catalyzed Addition of Allylsilane to o-Quinonediimides: Formal Diels-Alder Reaction Versus Allylation

Vijay Nair, G; Dhanya, R; Vidya, N; Devipriya, S (Thieme, 2006)

Lewis acid promoted addition of allylsilane to o-quinonediimines afforded tetrahydroquinoxaline derivatives or allylated amides, depending on the nature of the substituent on the imine nitrogen.
Homo Sapiens (Archaic) Baby Fossil of the Middle Pleistocene

Rajendran, P; Peter Koshy; Santha, S (Ubiquity Press, 2006-08)

On 14th October 2001 a suspected fossil was discovered within the ferricet at Oldai in Villupuram district of Tamil Nadu in South India. In order to prove the existence of a faunal fossil with the ferricrete it was subjected ...
Growth and Characterization of Indium Oxide Thin Films Prepared by Spray Pyrolysis

Manoj, P K; Gopchandran, K G; Peter Koshy; Vaidyan, V K; Benny Joseph (Elsevier, 2006-09)

Highly transparent and conducting indium oxide thin films are prepared on glass substrates from precursor solution of indium chloride. These films are characterized by X-ray diffraction, scanning electron microscopy and ...
Simultaneous Saccharification and Fermentation of Cassava Bagasse for l-(+)-Lactic Acid Production Using Lactobacilli

Rojan P John; Nampoothiri, K M; Pandey, A (Humana Press, 2006-09)

Saccharification and fermentation of cassava (Manihot esculenta) bagasse was carried out in a single step for the production of L-(+)-lactic acid by Lactobacillus casei and Lactobacillus delbrueckii. Using 15.5% w/v of ...

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