Tetrakis
Mostrando 1-12 de 76 artigos, teses e dissertações.
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1. Study of the CuII Affinity by Three Chelating Agents of Biological Interest: TPEN, TRIEN and Et2DTC
Copper is an important micronutrient, and it is present in some protein structures, as well as participate in several important biological processes. Due to its importance, some ligands are used and studied like carriers of copper in the biological systems. This work has investigated the affinity of CuII by three ligands of biological interest: N, N, N, N’
J. Braz. Chem. Soc.. Publicado em: 2021-04
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2. RECENTES APLICAÇÕES DO ORGANOFOTOCATALISADOR 1,2,3,5-TETRAQUIS(CARBAZOL-9-IL)-4,6-DICIANOBENZENO EM TRANSFORMAÇÕES QUÍMICAS
Ruthenium and iridium polypyridine complexes are among the most employed photocatalysts described in literature. The broad applicability is due to the redox potentials and long half-life times of the excited state which these molecules presented. The pursuit for metal-free alternatives has been intensified in the last few years, therefore, many organic fluor
Quím. Nova. Publicado em: 2021-03
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3. Shortcomings in the training program of medical residency during the COVID-19 pandemic in Brazil. How will they be repaired?
Ruthenium and iridium polypyridine complexes are among the most employed photocatalysts described in literature. The broad applicability is due to the redox potentials and long half-life times of the excited state which these molecules presented. The pursuit for metal-free alternatives has been intensified in the last few years, therefore, many organic fluor
Rev. Bras. Ginecol. Obstet.. Publicado em: 2021-03
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4. Duplo Benefício Ambiental pela Remoção de Corantes Fotosensibilizadores da Água com Uso de Resíduo Sólido Particulado
RESUMO As indústrias têxteis estão entre os setores mais poluidores do mundo, principalmente pelo descarte de resíduos de corantes sintéticos nos efluentes. Alguns processos têm sido utilizados atualmente para a remoção de corantes dos efluentes, mas apresentam as desvantagens de baixa viabilidade econômica e dificuldade de reprodução em larga esc
Matéria (Rio J.). Publicado em: 16/09/2019
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5. The Influence of Different Ammonium Cations on the Optical Properties of Tetrakis GdIII and EuIII Complexes
A series of tetrakis-β-diketonate Q+[Ln(β-dik)4]–, where Ln = GdIII or EuIII, Q = ammonium cations and β-dik = tta (2-thenoyltrifluoracetone) or bmdm (1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione) have been synthesized and characterized. The environment surrounding the EuIII ion depends on the lateral groups of the ligand and on the alkyl
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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6. Autoagregação da 5,10,15,20-tetrakis(4-metoxifenil)porfirina (tmpp): estudos espectroscópicos e análises multivariadas
In this work, the spectroscopic properties of 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrin (TMPP) in solvents of different polarities and water/ethanol mixtures were studied by electronic absorption spectroscopy and resonance light scattering associated with statistical analysis. The molar absorption coefficient and emission maximum of TMPP were dependent o
Quím. Nova. Publicado em: 2014
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7. Physico-chemical properties of meso-tetrakis(p-methoxyphenyl)porphyrin (TMPP) incorporated into pluronicTM p-123 and f-127 polymeric micelles
The physicochemical properties (solubilization, structural organization and stability) of meso-tetrakis(p-methoxyphenyl)porphyrin (TMPP), a promising photosensitizer for photodynamic therapy, solubilized in polymeric micelles of tri-block copolymers PluronicTM P-123 and F-127, were studied. The formulations obtained by the solid dispersion method led to mono
Quím. Nova. Publicado em: 2014
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8. Biomimetic oxidation studies of monensin A catalyzed by metalloporphyrins: identification of hydroxyl derivative product by electrospray tandem mass spectrometry
Monensin A is an important commercially available natural product isolated from Streptomyces cinnamonensins that shows antibiotic and anti-parasitic activities. This molecule has a significant influence in the antibiotic market, but until now there are no studies on putative metabolite formations. Bioorganic catalysts applying metalloporphyrins and mono-oxyg
Rev. bras. farmacogn.. Publicado em: 09/08/2013
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9. Investigação fotoluminescente de complexos tetrakis(β-dicetonatos) de terras raras / Photoluminescent investigation of rare earths tetrakis(β-diketonate) complexes
O presente trabalho aborda a síntese, caracterização e estudo fotoluminescente dos complexos tetrakis(β-dicetonatos) de terras raras (M)[TR(acac)4] (M+ = Li+, Na+ e K+; TR3+ = Eu3+, Gd3+, Tb3+ e Tm3+; acac- = acetilacetonato). Os dados de análise elementar evidenciam que os complexos são anidros. A espectroscopia de absorção da região do infrave
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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10. Síntese e caracterização espectroscópica de adutos obtidos com porfirinas, ácido esquárico e os metais de transição Co(II), Ni(II), Cu(II) e Zn (II)
Neste trabalho são descritas a síntese, as propriedades espectroscópicas e biológicas de metaloporfirinas derivadas de três diferentes porfirinas (5,10,15,20-tetrafenil)-21H,23H porfirina [H2TPP], (5,10,15,20-tetrapiridil)-21H,23H porfirina [H2TPyP] e (ρ-tetrakis-hidroxifenil)-21H,23H porfirina [H2TKP]. São um total de trinta e três compostos (18
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2011
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11. Possible in vivo mechanisms involved in photodynamic therapy using tetrapyrrolic macrocycles
Photodynamic therapy (PDT) mediated by oxidative stress causes direct tumor cell damage as well as microvascular injury. To improve this treatment new photosensitizers are being synthesized and tested. We evaluated the effects of PDT with 5,10,15,20-tetrakis(4-methoxyphenyl)-porphyrin (TMPP) and its zinc complex (ZnTMPP) on tumor levels of malondialdehyde (M
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-01
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12. Síntese, caracterização e estudo das propriedades eletrônicas de heterocomplexos formados por 4, 4, 4, 4, tetrassulfoftalocianina de cobalto (II) e tetrakis(N-metil-4- piridil)porfirina de cobalto (II) e formação de filmes Layer-by- Layer / Synthesis, characterization and study of the electronic properties of heterocomplexes formed by cobalt(II) 4, 4, 4, 4, tetrasulfophtalocyanine and cobalt(II) tetrakis(N-methyl-4-pyridyl)porphyrin and Layer-by-Layer films formation
Neste trabalho relatam-se as etapas de síntese, caracterização e estudo das propriedades eletrônicas de heterocomplexos formados por tetrakis(N-metil-4- piridil)porfirina de cobalto (II) (CoTMPyP) e 4, 4, 4, 4, tetrassulfoftalocianina de cobalto (II) (CoTsPc) em solução e em filmes finos. Foram realizadas titulações espectroscópicas utilizando-se so
Publicado em: 2011