Photochemical Properties
Mostrando 1-12 de 86 artigos, teses e dissertações.
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1. 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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2. 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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3. Supramolecular Approach in Energy Conversion Devices
This review summarizes investigations carried out at the Laboratory of Photochemistry and Energy Conversion (LFCE) in the University of São Paulo dealing with design and characterization of ruthenium(II), rhenium(I) and iridium(III) polypyridine complexes with desired photochemical and photophysical properties in light of the development of optoelectronics
J. Braz. Chem. Soc.. Publicado em: 2020-11
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4. Semicondutores heteroestruturados: uma abordagem sobre os principais desafios para a obtenção e aplicação em processos fotoquímicos ambientais e energéticos
Heterostructured semiconductors are materials with unique features formed by combination of two or more semiconductors with suitable interface between them. The study of the heterostructures aim the development of physico-chemical and photocatalytic properties higher than their isolated phases, which makes it possible to obtain higher efficiency and lower co
Quím. Nova. Publicado em: 15/08/2019
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5. Síntese de óxidos mistos AMn2O4 (A=Co, Cu e Ni) preparados por autocombustão para controle de emissões de compostos orgânicos voláteis
RESUMO Os compostos orgânicos voláteis (COVs) são substâncias que possuem elevada pressão de vapor e baixa solubilidade em água e são reconhecidos por serem um dos maiores responsáveis pela poluição atmosférica, tanto por sua natureza tóxica quanto por serem os precursores do ozônio e do smog fotoquímico. O objetivo deste trabalho foi sintetiza
Matéria (Rio J.). Publicado em: 20/05/2019
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6. Photophysical and Photochemical Properties and Aggregation Behavior of Phthalocyanine and Naphthalocyanine Derivatives
The photophysical and photochemical properties of phthalocyanine and naphthalocyanine with similar structures were studied in solution and with density-functional theory (DFT) computational method. The extended π-conjugated system in naphthalocyanines causes a bathochromic shift in UV-Vis, emission and excitation bands, and promotes lesser generation of sin
J. Braz. Chem. Soc.. Publicado em: 2018-06
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7. A Potential Visible-Light NO Releaser: Synthesis, Reactivity and Vasodilator Properties
The cis-[Ru(bpy)2(4-bzpy)(NO)](PF6)3 complex was prepared (4-bzpy = 4-benzoylpyridine), and characterized by UV-visible, infrared and nuclear magnetic resonance (NMR) spectroscopies and electrochemical techniques. The reaction with cysteine was preliminarily investigated, aiming to shed light on the potential biological mechanism for NO or HNO release mediat
J. Braz. Chem. Soc.. Publicado em: 2017-11
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8. Tunable Photochemical/Redox Properties of (Phenylthio)ncorannulenes: Application to a Photovoltaic Device
The additive substituent effect of phenylmercapto derivatives of corannulene are investigated by spectroscopic, electrochemical, and computational techniques. The per-substituted phenylmercaptocorannulene is incorporated as a replacement for [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) in a photovoltaic device.
J. Braz. Chem. Soc.. Publicado em: 2016-10
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9. Avaliação de fármacos fotossensíveis derivados da cloro alumínio ftalocianina no tratamento da progressão tumoral em modelo de matriz tridimensional mista / Evaluation of photosensitizers aluminum chloride phthalocyanine derivatives in the treatment of tumor progression in three-dimensional matrix.
Wound healing process can be favored by Low Level Laser Therapy, with the collagen and elastin matrix a dermic substitute described as an appropriate system in tissue engineering and in tridimensional skin systems. With this purpose, a study was elaborated using the system nanoemulsion of aluminium-chloride phthalocyanine (ClAlPc) as photosensitizer in skin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/10/2012
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10. Síntese e caracterização de misturas poliméricas condutoras para aplicação em membranas biodegradáveis e dispositivos eletroluminescentes / Synthesis and characterization of conducting polymeric blends for use in biodegradable membranes and electroluminescent devices
The electrical properties of some conducting polymers and their blends have contributed to the technological advancement in various areas such as medicine and microelectronics. Recently, photochemical synthesis and spinner techniques have been using to prepare polymeric blends with good conducting properties. In this study we report the preparation of conduc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2012
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11. Obtenção e caracterização de ftalocianinas com substituintes quirais com potencial aplicação em terapia fotodinâmica / Synthesis and characterization ofphthalocyanines with chiralsubstituints with potencialfor use in Photodynamic Therapy
The main objective of this project is the synthesis and characterization of new phthalocyanines with chiral substituents to improve their photophysical and photochemical properties for use as photosensitizers in Photodynamic Therapy. Three new phthalocyanines were synthesized and characterized, one with the racemic mixture of 1-(4-bromophenyl)- ethanol, and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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12. Efeito de agentes de compatibilização em blendas de PS/EPDM
This dissertation describes a study about the toughening of polystyrene with EPDM to obtain higher photooxidative properties and a good balance of impact and tensile properties in comparison to commercial HIPS. Linear triblock copolymers SEBS or SBS were used as compatibilizers to obtain better properties. PS/SBS and PS/SEBS blends were also prepared to inve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011