Solvatochromic Probes
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Convenient solvatochromic probes for the determination of solvent properties: β-carotene and 2-chloro-7-nitro-9H-fluorene
Dipolaridade/polarizabilidade do solvente (SDP) tem sido calculada a partir dos espectros de UV-Vis de 2-(N,N-dimetilamino)-7-nitro-9H-fluoreno e 2-fluoro-7-nitro-9H-fluoreno. Com base em cálculos teóricos (23 solventes) e dados experimentais (56 solventes), revela-se que 2-cloro-7-nitro-9H-fluoreno (disponível comercialmente) pode ser perfeitamente utili
J. Braz. Chem. Soc.. Publicado em: 2013-07
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2. Pure solvents and their mixtures solvation: relevance to chemistry and creen chemistry / Solvatação por solventes puros e suas misturas: relevância para química e química verde
In the present work, solvatochromic probes were employed in the study of pure solvents, binary mixtures of water with protic and aprotic solvents, ionic liquids and their aqueous binary mixtures The probes studied are classified in two series: (i) RPMBr2; where R = methyl to 1-octyl allowed increasing the hydrophobicity while maintaining the pKa constant. (i
Publicado em: 2008
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3. Vibrational and electronic spectroscopy of diaminoanthraquinones as microenvironment probes / Espectroscopia vibracional e eletrônica de Diaminoantraquinonas como sondas de microambientes
In the present work, the ionochromic and solvatochromic behavior of several diaminoantraquinones were investigated by means of optical and vibrational spectroscopies, alongside computational simulation. The UV-Vis spectra of 1,2- diaminoantraquinone (1,2-DAAQ) were analyzed using empirical solvatochromic scales, like the Kamlet-Taft. Such analysis enabled an
Publicado em: 2007
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4. Detecção de analitos neutros e aniônicos através do uso de sensores cromogênicos baseados na competição de uma merocianina solvatocrômica e do substrato por uma unidade receptora
Este trabalho apresenta o desenvolvimento de sensores cromogênicos para espécies neutras e aniônicas, através da interação uma merocianina solvatocrômica (merocianina de Brooker, MB) com diferentes receptores (α-, β-, γ-, hidroxipropil-β, metil-β-ciclodextrina e ácido fenil borônico). A interação não covalente de ciclodex
Publicado em: 2007
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5. Síntese e propriedades de soluções de tensoativos catiônicos derivados de (3-dimetilaminopropil)amidas de ácidos carboxílicos / Synthesis and solution properties of cationic surfactants derivated from fat acids of (3-dimethylaminopropyl)amides.
The following surfactants have been synthesized: benzyl-(3-acyl-aminopropyl)dimethylammonium chloride, RCONH(CH ind.2 ) ind.3 N pot.+ (CH ind.3 ) ind.2 CH ind.2 C ind.6 H ind.5 Cl pot.- and (3-acylaminopropyl) trimethylammonium chloride, RCONH(CH ind.2 ) ind.3 N pot.+ (CH ind.3 ) ind.3 Cl ind.- , where RCO = C ind.10 to C ind.16 . The two series have been sy
Publicado em: 2002
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6. 7-nitrobenz-2-oxa-1,3-diazole-4-yl-labeled phospholipids in lipid membranes: differences in fluorescence behavior.
Steady-state and time-resolved fluorescence properties of the 7-nitrobenz-2-oxa-1, 3-diazole-4-yl (NBD) fluorophore attached either to the sn-2 acyl chain of various phospholipids (phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and phosphatidic acid) or to the polar headgroup of phosphatidylethanolamine were studied after insertion of the