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Itens para a visualização no momento 281-290 of 366
5-Aril-isoxazóis – síntese e aplicação como modelos para estudos supramoleculares
(Universidade Federal de Santa Maria, 2014-08-04)
This work describes the synthesis and halogenation of isoxazoles, and its
application as a model for investigating complexities in the self-organization of
molecules at the supramolecular level, demonstrating that the ...
Determinação de elementos-traço em borracha natural e de silicone por espectrometria de absorção atômica com forno de grafite com amostragem de sólidos
(Universidade Federal de Santa Maria, 2012-03-11)
In this work the use of solid sampling graphite furnace atomic absorption
spectrometry for the determination of Cr, Cu, Mn, Ni, Pb, Sb, Sn and Zn in
natural rubber and Cr in silicone rubber was proposed. Calibration was ...
Contaminantes metálicos em contrastes a base de quelatos de gadolínio e reações de transmetalação
(Universidade Federal de Santa Maria, 2013-10-18)
Gadolinium (Gd) is the basis of contrast media most used in magnetic resonance imaging (MRI). Because it is a very toxic metal ion, all Gd-based contrast media present chelating agents in their composition. Gd-based ...
Avaliação da auto-associação molecular de complexos metálicos com ligantes triazenidos derivados do 1,3-bis(fenil)triazeno
(Universidade Federal de Santa Maria, 2007-09-13)
This work presents the synthesis and the investigation of the crystalline and molecular structure of 1,3-bis(2-methoxy-4-nitrophenyl)triazene ethanol and seventeen new mononuclear or binuclear complexes of Cu(I), Cu(II), ...
Síntese e caracterização de triazenos e complexos com Hg(II) incluindo arranjos supramoleculares
(Universidade Federal de Santa Maria, 2011-10-14)
This work presents the synthesis of new compounds and their triazenes complexes of
mercury(II). Triazenes have three nitrogen atoms connected in sequence [ N=N N(H) ] and, when
deprotonated, they become good Lewis bases ...
Síntese, cristalografia e atividade biológica de complexos triazenidos de Au(I), Ag(I), Pd(II) E Pt(II)
(Universidade Federal de Santa Maria, 2012-08-24)
This work presents the synthesis of compounds and their triazenes complexes of gold(I), silver(I), platinum(II) and paladium(II). Triazenes have three nitrogen atoms connected in sequence [ N=N N(H) ] and, when deprotonated, ...
Estudo sobre a síntese e caracterização de clusters binários e ternários de organocalcogenetos contendo metais de transição
(Universidade Federal de Santa Maria, 2008-03-31)
This work presents a study related to the synthesis and characterization of a series of clusters with chacogen-metal bonds in which the metals are mercury, silver, cobalt, nickel, palladium, cadmium and zinc. The synthetic ...
Triazenos N-óxidos e seus complexos de Au(I) e Pd(II): uma abordagem no contexto da engenharia de cristais
(Universidade Federal de Santa Maria, 2018-02-02)
This work presents the synthesis of several molecular models, divided into four
chapters, and which were strategically synthesized for application in Crystal Engineering. In
the first chapter the synthesis of a series ...
Síntese de 2-alquinil telurofenos via reação de sonogashira entre 2-halotelurofeno e 1-alcinos
(Universidade Federal de Santa Maria, 2006-05-29)
We present herein our results of the palladium-catalyzed cross-coupling of 2-halotellurophenes with several terminal alkynes to give acetylenic tellurophene
derivatives in excellent yields. Our initial efforts were devoted ...
Validação de métodos multirresíduos de extração e desenvolvimento de método de purificação por GPC para análise de resíduos de pesticidas em soja utilizandoGC-MS, GC-MS/MS e LC-MS/MS
(Universidade Federal de Santa Maria, 2006-03-01)
Due to the complexity of the soybean matrix and the very low pesticide concentrations expected for these samples, it is really necessary to develop efficient and reliable analytical methods to identify and quantify their ...