Zobrazeno 1 - 10 of 32 pro vyhledávání: '"José G.P. Espínola"'
1
Synthesis, thermochemical and quantum chemical studies on antimony(III) and bismuth(III) complexes with 2,2′-bipyridine and 1,10-phenanthroline
Autor: Gerd B. Rocha, Evandro Paulo Soares Martins, José G.P. Espínola, José de Alencar Simoni
Publikováno v: Thermochimica Acta. 676:234-240
A thermochemical study of [SbCl3(L)] and [BiBr3(L)] complexes, wherein L is 2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen), was performed by calorimetric measurements in solution. The complexes were synthesized and characterized by elemental a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8e063f2e9ee958c610a3b08aa2936c0
https://doi.org/10.1016/j.tca.2019.05.005
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2
Luminescence properties of the Ln–EDTA complexes covalently linked to the chitosan biopolymers containing β-diketonate as antenna ligands
Autor: Israel F. Costa, José G.P. Espínola, Maria C. F. C. Felinto, Ercules E.S. Teotonio, Hermi F. Brito, Wagner M. Faustino, Gilvan P. Pires
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
This paper reports on the preparation, characterization, and photoluminescence properties of novel hybrid materials, in which the EDTA-Ln-L complexes (where L: H2 O, acac, bzac, dbm, and tta ligands, and Ln: Eu, Gd, and Tb) were covalently linked to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba340e274004fc0c2b56e612bd2b15d2
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4
Luminescent hybrid materials functionalized with lanthanide ethylenodiaminotetraacetate complexes containing β-diketonate as antenna ligands
Autor: Wagner M. Faustino, Franklin P. Aguiar, Jandeilson de Lima Moura, Hermi F. Brito, José G.P. Espínola, Ercules E.S. Teotonio, Maria C. F. C. Felinto, Israel F. Costa, Tiago Becerra Paolini
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Three organic–inorganic hybrid materials based on silica gel functionalized with (3-aminopropyl)trimethoxysilane (APTS), [3-(2-aminoetilamino)-propil]-trimetoxissilano (DAPTS) and 3-[2-(2-aminoetilamino)etilamino] propiltrimetoxysilane (TAPTS) and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247caf0b3b1abc945704fa99d120d864
https://doi.org/10.1016/j.jlumin.2015.06.038
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5
Luminescent Eu III Complexes Immobilized on a Vermiculite Clay Surface
Autor: Hermi F. Brito, Wagner M. Faustino, Maria G. Fonseca, José G.P. Espínola, Haryane R. M. Silva, Ercules E.S. Teotonio
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Vermiculite clays were leached with nitric acid and functionalized with (3-chloropropyl)trimethoxysilane. The resulting materials were modified with the methylimidazolium (MID) group to yield cationic surfaces. These materials were characterized by i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::696b2b701d9715bda1d8fc5200dfa089
https://doi.org/10.1002/ejic.201301494
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6
Thermal decomposition study of bismuth (III) trichloride complex with 1,10-phenanthroline as the ligand
Autor: Franklin P. Aguiar, Evandro Paulo Soares Martins, Luiza N.H. Arakaki, José G.P. Espínola, Haryane R. M. Silva, Ercules E.S. Teotonio, Maria G. Fonseca
Publikováno v: Journal of Thermal Analysis and Calorimetry. 106:601-606
The complex BiCl3·L (L = 1,10-phenanthroline) was synthesized and characterized by elemental analysis and infrared spectroscopy (IR). Infrared spectroscopy data suggested that the nitrogen atom of the aromatic ring is bonded to the bismuth atom. The
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f550c7ff90317d7735ddb6695bf0eb86
https://doi.org/10.1007/s10973-011-1341-z
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7
A new organofunctionalized silica containing thioglycolic acid incorporated for divalent cations removal—A thermodyamic cation/basic center interaction
Autor: Luiza N.H. Arakaki, Ana Fernanda de S. Germano, Maria G. Fonseca, Vaeudo V. Oliveira, Claudio Airoldi, José G.P. Espínola, André Leonardo P. Silva, Kaline S. Sousa, Tomaz Arakaki
Publikováno v: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 332:144-149
The silylating agent 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane was previously immobilized onto silica gel in heterogeneous route, followed by incorporation of thioglycolic acid. The elemental analysis for this final organofunctionali
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d5bb743bdb7537e1e032e1fe8ee9c79a
https://doi.org/10.1016/j.colsurfa.2008.09.010
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8
Chemisorption of divalent cations on a silica gel surface modifield with thioglycolic acid: pH influence and ionic strength
Autor: Maria G. Fonseca, José G.P. Espínola, Victor Hugo Araújo Pinto, Luiza N.H. Arakaki, Vera Lucia S. Augusto Filha, Kaline S. Sousa
Publikováno v: Química Nova, Volume: 30, Issue: 3, Pages: 528-534, Published: JUN 2007
Química Nova v.30 n.3 2007
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
A novel type of heavy metal adsorbent was prepared by the covalent grafting of thioglycolic acid molecules on a silica gel surface previsiouly modified with 3-aminopropyltrimethoxysilane. The amount of thioglycolic acid immobilized was 1.03 mmol per
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f621186aabdb81a85cd4d515ae3c1860
https://doi.org/10.1590/s0100-40422007000300005
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9
Enthalpies of formation of adducts of antimony(III) iodide with pyridine and methyl-pyridines
Autor: José G.P. Espínola, Antônio S. Nobrega, Luiza N.H. Arakaki, Maria G. Fonseca, Severino F. de Oliveira
Publikováno v: Thermochimica Acta. 456:102-105
Solid adducts of formula SbI 3 ·L (L = pyridine or 2-, 3- or 4-methylpyridine abbreviated as Py, 2MPy, 3MPy or 4MPy) were synthesized and characterized by elemental analysis, IR spectroscopy and thermal analysis. IR data showed that coordination to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86b0289e6027ebc8dae64d0fd77adf82
https://doi.org/10.1016/j.tca.2007.02.007
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10
Vermiculite as a useful host for guest cyclic aliphatic amine intercalation, followed by cation adsorption
Autor: José G.P. Espínola, Maria G. Fonseca, Luiza N.H. Arakaki, Ramon K.S. Almeida, Claudio Airoldi
Publikováno v: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 280:39-44
Two vermiculite hybrids containing aliphatic amines intercalated were synthesized. The amount of guest molecules intercalated resulted in 0.60 and 0.52 mmol g−1 for pyperidine and pyperazine, respectively, which reflect the effectiveness of such ki
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01f1ad5728e7c912fbe8f8826a1004fb
https://doi.org/10.1016/j.colsurfa.2006.01.020
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