The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform
Holgadinei Rodrigues Ribeiro - One of the best experts on this subject based on the ideXlab platform.
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Sintese e caracterização de complexos platina-fulereno
2017Co-Authors: Holgadinei Rodrigues RibeiroAbstract:Resumo: A reatividade do fulereno-60 foi explorada objetivando a formação de complexos de platina-fulereno com uma variedade de ligantes, tais como: trifenilfosfina, tricicloexilfosfina, trimetilfosfito, tributilfosfina, trimetilfosfina, terc-butilisocianeto e carbonila. Os complexos foram obtidos a partir de reações entre o fulereno[60] e compostos de platina zerovalente à temperatura ambiente, utilizando a técnica de Schlenk em atmosfera inerte. Todos solventes utilizados foram previamente purificados e destilados nesta atmosfera. Foram obtidos os seguintes produtos: [Pt(PCy3)(C60)], [Pt(C2H4)(PPh3)(C60)], [Pt{P(OMe)3}2(C60)], [Pt{P(n-Bu)3}2(C60)], [Pt(PCy3)(PPh3)(C60)], [Pt(PPh3)2(C60)], [Pt(PCy3){P(OMe)3}(C60)], [Pt(PCy3)(CNBu)(C60)], [Pt(PCy3)(CO)(C60)], [Pt(PCy3)(PMe3)(C60)], [Pt(PMe3)2(C60)], [Pt(PPh3)(PMe3)(C60)]. Todos produtos foram caracterizados espectroscopicamente por IV, Raman, RMN de H e P e análise elementar.Abstract: The reactivity of fullerene-60 was explored on the formation of platinum-fullerene complexes using a variety of ligands, such as: triphenylphosphine, tricyclohexylprosphine, trimetylphosphite, tri-n-butylphosphine, trimethylphosphine, tert-butylisocyanide and carbonyl. The products were obtained from reactions between fullerene [60] and zerovalent platinum compounds at ambient temperature and inert atmosphere, using the Schlenk Technique. All solvents used were previously purified and distilled at this atmosphere. The following complexes were obtained: [Pt(PCy3)(C60)], [Pt(C2H4)(PPh3)(C60)], [Pt{P(OMe)3}2(C60)], [Pt{P(n-Bu)3}2(C60)], [Pt(PCy3)(PPh3)(C60)], [Pt(PPh3)2(C60)], [Pt(PCy3){P(OMe)3}(C60)], [Pt(PCy3)(CNBut)(C60)], [Pt(PCy3)(CO)(C60)], [Pt(PCy3)(PMe3)(C60)], [Pt(PMe3)2(C60)], [Pt(PPh3)(PMe3)(C60)]. All products were spectrocopically characterized by infrared, Raman, NMR H e P and elementary analysis
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Sintese e caracterização de complexos platina-fulereno
Universidade Estadual de Campinas . Instituto de Quimica, 2001Co-Authors: Holgadinei Rodrigues RibeiroAbstract:A reatividade do fulereno-60 foi explorada objetivando a formação de complexos de platina-fulereno com uma variedade de ligantes, tais como: trifenilfosfina, tricicloexilfosfina, trimetilfosfito, tributilfosfina, trimetilfosfina, terc-butilisocianeto e carbonila. Os complexos foram obtidos a partir de reações entre o fulereno[60] e compostos de platina zerovalente à temperatura ambiente, utilizando a técnica de Schlenk em atmosfera inerte. Todos solventes utilizados foram previamente purificados e destilados nesta atmosfera. Foram obtidos os seguintes produtos: [Pt(PCy3)(C60)], [Pt(C2H4)(PPh3)(C60)], [Pt{P(OMe)3}2(C60)], [Pt{P(n-Bu)3}2(C60)], [Pt(PCy3)(PPh3)(C60)], [Pt(PPh3)2(C60)], [Pt(PCy3){P(OMe)3}(C60)], [Pt(PCy3)(CNBu)(C60)], [Pt(PCy3)(CO)(C60)], [Pt(PCy3)(PMe3)(C60)], [Pt(PMe3)2(C60)], [Pt(PPh3)(PMe3)(C60)]. Todos produtos foram caracterizados espectroscopicamente por IV, Raman, RMN de H e P e análise elementar.The reactivity of fullerene-60 was explored on the formation of platinum-fullerene complexes using a variety of ligands, such as: triphenylphosphine, tricyclohexylprosphine, trimetylphosphite, tri-n-butylphosphine, trimethylphosphine, tert-butylisocyanide and carbonyl. The products were obtained from reactions between fullerene [60] and zerovalent platinum compounds at ambient temperature and inert atmosphere, using the Schlenk Technique. All solvents used were previously purified and distilled at this atmosphere. The following complexes were obtained: [Pt(PCy3)(C60)], [Pt(C2H4)(PPh3)(C60)], [Pt{P(OMe)3}2(C60)], [Pt{P(n-Bu)3}2(C60)], [Pt(PCy3)(PPh3)(C60)], [Pt(PPh3)2(C60)], [Pt(PCy3){P(OMe)3}(C60)], [Pt(PCy3)(CNBut)(C60)], [Pt(PCy3)(CO)(C60)], [Pt(PCy3)(PMe3)(C60)], [Pt(PMe3)2(C60)], [Pt(PPh3)(PMe3)(C60)]. All products were spectrocopically characterized by infrared, Raman, NMR H e P and elementary analysis
Mihrimah Ozkan - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and Characterization of Iron Oxide Derivatized Mutant Cowpea Mosaic Virus Hybrid Nanoparticles
Advanced Materials, 2008Co-Authors: Alfredo A. Martinez-morales, Cengiz Sinan Ozkan, Nathaniel G. Portney, Giuseppe Destito, Gurer Budak, Marianne Manchester, Ekmel Ozbay, Mihrimah OzkanAbstract:The enhanced local magnetic field strength was qualitatively analyzed by magnetic force microscopy (MFM), demonstrating a characteristic advantage for attaching derivatized magnetic iron oxide (IO) nanoparticles in an organic medium. the synthesis of 11 nm size IO nanoparticles was carried out under nitrogen atmosphere using standard Schlenk Technique. The biocompatible γ-Fe2O3-COOH nanoparticles were synthesized by thermal decomposition of Fe(CO)5 and surface modified. Atomic force microscopy (AFM) was used to characterize structurally the as-synthesized IO nanoparticles on a silicon substrate. The histogram of the size distribution of the IO nanoparticles determined from 68 individual measurements on single IO nanoparticles exhibited a mean size of δ11 nm. MFM showed that the textured regions observed on each hybrid are indicative of IO nanoclusters decorating the surface of single virions
Edwin Kroke - One of the best experts on this subject based on the ideXlab platform.
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low cost apparatus for rapid boiling point determination of small air sensitive samples under inert atmosphere
Thermochimica Acta, 2017Co-Authors: Marcus Herbig, Edwin KrokeAbstract:Abstract The boiling point is a characteristic property of substances and mixtures. We have developed a new low cost apparatus which uses standard Schlenk Technique for measuring the boiling point of small samples (
Alfredo A. Martinez-morales - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and Characterization of Iron Oxide Derivatized Mutant Cowpea Mosaic Virus Hybrid Nanoparticles
Advanced Materials, 2008Co-Authors: Alfredo A. Martinez-morales, Cengiz Sinan Ozkan, Nathaniel G. Portney, Giuseppe Destito, Gurer Budak, Marianne Manchester, Ekmel Ozbay, Mihrimah OzkanAbstract:The enhanced local magnetic field strength was qualitatively analyzed by magnetic force microscopy (MFM), demonstrating a characteristic advantage for attaching derivatized magnetic iron oxide (IO) nanoparticles in an organic medium. the synthesis of 11 nm size IO nanoparticles was carried out under nitrogen atmosphere using standard Schlenk Technique. The biocompatible γ-Fe2O3-COOH nanoparticles were synthesized by thermal decomposition of Fe(CO)5 and surface modified. Atomic force microscopy (AFM) was used to characterize structurally the as-synthesized IO nanoparticles on a silicon substrate. The histogram of the size distribution of the IO nanoparticles determined from 68 individual measurements on single IO nanoparticles exhibited a mean size of δ11 nm. MFM showed that the textured regions observed on each hybrid are indicative of IO nanoclusters decorating the surface of single virions
Jeanmarie Basset - One of the best experts on this subject based on the ideXlab platform.
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immobilization of η5 cyclopentadienyltris dimethylamido zirconium polymerization catalysts on a chlorosilane and hmds modified mesoporous silica surface a new concept for supporting metallocene amides towards heterogeneous single site catalysts
Journal of Molecular Catalysis A-chemical, 2001Co-Authors: Horst Schneider, Gerd T Puchta, Franz A R Kaul, Gabriele Raudaschlsieber, Frederic Lefebvre, Guillaume Saggio, Dimitrios Mihalios, Wolfgang A Herrmann, Jeanmarie BassetAbstract:Abstract The modification of a mesoporous silica surface with Si(Ind)(CH 3 ) 2 Cl and the immobilization of CpZr(NMe 2 ) 3 on this surface was studied via IR-spectroscopy. To reduce side reactions, the indenyl-modified silica was reacted with hexamethyldisilazane (HMDS) under IR-control before the CpZr(NMe 2 ) 3 -immobilization. The role of the hydroxyl group protection with HMDS is discussed. The surface modifications have been repeated via Schlenk Technique at the same conditions and the surface modifications were studied with 13 C CP MAS–NMR, 1 H MAS–NMR, elemental-, SEM- and BET-analysis. The surface species of the resulting catalysts are discussed. The precatalysts have been treated with methylaluminoxane (MAO) (Al:Zr (mol:mol)=500:1) and the resulting Zr contents (leaching-effect) are discussed. All catalysts have been tested in ethylene and propylene polymerization.
