A5074451832- Chemical Reaction Mechanisms
- Surfactants and Colloidal Systems
- Analytical Chemistry and Chromatography
- Molecular Sensors and Ion Detection
- DNA and Nucleic Acid Chemistry
- Spectroscopy and Quantum Chemical Studies
- Supramolecular Chemistry and Complexes
- Chemical Synthesis and Reactions
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- X-ray Diffraction in Crystallography
- Inorganic and Organometallic Chemistry
- Chemical Synthesis and Analysis
- Synthesis and Reactions of Organic Compounds
- Electrochemical Analysis and Applications
- Photochemistry and Electron Transfer Studies
- Chemical and Physical Properties in Aqueous Solutions
- Synthesis and Characterization of Heterocyclic Compounds
- Crystallography and molecular interactions
- Folate and B Vitamins Research
- Porphyrin Metabolism and Disorders
- Advanced Chemical Physics Studies
- Metal complexes synthesis and properties
- Free Radicals and Antioxidants
- Thermodynamic properties of mixtures
Universidade Federal de Santa Catarina
2013-2022
Instituto Nacional de Ciência e Tecnologia de Catálise em Sistemas Moleculares e Nanoestruturados
2012-2022
Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina
2014-2021
Polydoro Ernani de São Thiago University Hospital
2016
Norwegian Institute of International Affairs
2014
MF Norwegian School of Theology, Religion and Society
2014
University of Sheffield
2011
Pandit Ravishankar Shukla University
2010
Federal University of São João del-Rei
2010
Universidade Estadual de Campinas (UNICAMP)
2004-2010
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon binding and reactivity at charged aqueous interfacesClifford A. Bunton, Faruk Nome, Frank H. Quina, Laurence S. RomstedCite this: Acc. Chem. Res. 1991, 24, 12, 357–364Publication Date (Print):December 1, 1991Publication History Published online1 May 2002Published inissue 1 December 1991https://pubs.acs.org/doi/10.1021/ar00012a001https://doi.org/10.1021/ar00012a001research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPartitioning behavior of solutes eluted with micellar mobile phases in liquid chromatographyDaniel W. Armstrong and Faruk. NomeCite this: Anal. Chem. 1981, 53, 11, 1662–1666Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue 1 September 1981https://pubs.acs.org/doi/10.1021/ac00234a026https://doi.org/10.1021/ac00234a026research-articleACS PublicationsRequest reuse permissionsArticle...
The reaction mechanism of the GPx-like oxidation PhSH with H2O2 catalyzed by selenoxides proceeds via formation hydroxy perhydroxy selenane, which is a stronger oxidizing agent than selenoxide. A selenane intermediate was observed electrospray ionization mass spectrometry and 77Se NMR spectroscopy in reactions selenoxide 8 H2O2.The initial velocity 4 orders magnitude higher that without peroxide. Selenoxide not reduced to selenide 6 presence H2O2. While electronic substituent effects have...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEfficient detection and evaluation of cyclodextrin multiple complex formationDaniel W. Armstrong, Faruk. Nome, Larry A. Spino, Teresa D. GoldenCite this: J. Am. Chem. Soc. 1986, 108, 7, 1418–1421Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://pubs.acs.org/doi/10.1021/ja00267a010https://doi.org/10.1021/ja00267a010research-articleACS PublicationsRequest reuse permissionsArticle...
Purple acid phosphatases (PAPs) are a group of metallohydrolases that contain dinuclear FeIIIMII center (MII = Fe, Mn, Zn) in the active site and able to catalyze hydrolysis variety phosphoric esters. The complex [(H2O)FeIII(μ-OH)ZnII(L-H)](ClO4)2 (2) with ligand 2-[N-bis(2-pyridylmethyl)aminomethyl]-4-methyl-6-[N′-(2-pyridylmethyl)(2-hydroxybenzyl) aminomethyl]phenol (H2L-H) has recently been prepared is found closely mimic coordination environment FeIIIZnII red kidney bean PAP (Neves et...
Historically, the chemistry of phosphate transfer-a class reactions fundamental to Life-has been discussed almost exclusively in terms nucleophile and leaving group. Reactivity always depends significantly on both factors; but recent results for triesters have shown that it can also depend strongly nature nonleaving or "spectator" groups. The extreme stabilities fully ionised mono- dialkyl esters be seen as extensions same effect, with one two triester OR groups replaced by O(-). Our chosen...
Phosphate diester hydrolysis is strongly accelerated, by a factor of 104, in the presence artificial enzymes especially designed light spatiotemporal concepts, anchoring imidazoles pillar[5]arene matrix. Host:guest complexes cleave aryl phosphodiesters via nucleophilic attack properly placed imidazole moieties with release 2,4-dinitrophenolate and formation unstable phosphoroamidates that regenerate catalyst 2,4-dinitrophenyl phosphate. Comparison reactivity P5IMD shows 270-fold increase....
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence probes in reversed micelles. Luminescence intensities, lifetimes, quenching, energy transfer, and depolarization of pyrene derivatives cyclohexane the presence dodecylammonium propionate aggregatesGlenn D. Correll, Raymond N. Cheser III, Faruk Nome, Janos H. FendlerCite this: J. Am. Chem. Soc. 1978, 100, 4, 1254–1262Publication Date (Print):February 1, 1978Publication History Published online1 May 2002Published inissue 1 February...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnergy transfer in micellar systems. Steady state and time resolved luminescence of aqueous micelle solubilized naphthalene terbium chlorideJose R. Escabi-Perez, Faruk Nome, Janos H. FendlerCite this: J. Am. Chem. Soc. 1977, 99, 24, 7749–7754Publication Date (Print):November 1, 1977Publication History Published online1 May 2002Published inissue 1 November...
Palladium nanoparticles (NPs) with an average size of 3.4 nm were prepared in water using imidazolium-based surfactant 3-(1-dodecyl-3-imidazolio)propanesulfonate (ImS3-12) as a stabilizer. The Pd NPs are highly dispersible and chloroform characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, powder diffraction, dynamic light scattering. results indicate that the NP surface is covered double layer ImS3-12 molecules. effective aqueous biphasic hydrogenation...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLimitations of the pseudophase model micellar catalysis. The dehydrochlorination 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane and some its derivativesFaruk Nome, Adley F. Rubira, Cesar Franco, Lavinel G. IonescuCite this: J. Phys. Chem. 1982, 86, 10, 1881–1885Publication Date (Print):May 1, 1982Publication History Published online1 May 2002Published inissue 1...
Synthesis of a new zwitterionic surfactant containing the imidazolium ring 3-(1-tetradecyl-3-imidazolio)propanesulfonate (ImS3-14) is described. The solubility ImS3-14 very low but increases on addition salt which helps to stabilize micellized surfactant. Fluorescence quenching and electrophoretic evidence for shows that micellar aggregation number only slightly sensitive added salts, as critical micelle concentration, NaClO(4) markedly zeta potentials in similar way...
The phosphorylation of imidazole by two activated phosphate diesters and a triester gives phosphorylimidazole derivatives that are stable enough in aqueous solution to be observed identified ESI-MS/MS NMR. Half-lives ranging from hours days (in the case monoethyl ester) show it is possible design molecules with variable half-lives potential used for biological intervention experiments as inhibitors biosignaling processes or haptens generation antibodies.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of surfactants on ligand exchange reactions in vitamin B12a water and benzene. Influence aqueous micelles solvent restrictionsJanos H. Fendler, Faruk Nome, Howard C. Van WoertCite this: J. Am. Chem. Soc. 1974, 96, 21, 6745–6753Publication Date (Print):October 1, 1974Publication History Published online1 May 2002Published inissue 1 October 1974https://pubs.acs.org/doi/10.1021/ja00828a033https://doi.org/10.1021/ja00828a033research-articleACS...
Palladium nanoparticles (NPs) stabilized by a zwitterionic surfactant are revealed here to be good catalysts for the reductive amination of benzaldehydes using formate salts as hydrogen donors in aqueous isopropanol. In terms environmental impact and economy, metallic NPs offer several advantages over homogeneous traditional heterogeneous catalysts. usually display greater activity due increased metal surface area sometimes exhibit enhanced selectivity. Thus, it is possible use very low...
Phosphate ester destabilization inside pillar[5]arene due to disrupting the H-bonding water speed its hydrolysis reaction.
Cucurbit[7]uril (CB7) catalyzes the acid hydrolysis of alkoxyphenyldioxolanes bearing both neutral and cationic alkoxy groups. The magnitude catalytic effect depends on dioxolane structure, as reflected by CB7 binding constants catalysis rate constants. However, there is no clear relationship in such a way that increasing affinity (cationic dioxolanes or large groups) does not enhance effect. A-1 mechanism for involves protonation formation carbocation protonated ring opening. Supramolecular...
This essay focuses on the debate between Warshel et al. (proponents of preorganization) and Menger Nome spatiotemporal effects) over source fast enzyme catalysis. The model proposes that main function enzymes is to push solvent coordinate toward transition state. Other physical-organic factors (e.g., desolvation, entropic effects, ground state destabilization, etc.) do not, ostensibly, contribute substantially rate. Indeed, physical organic chemistry in its entirety was claimed be...
Nonionic hydrazine reacts with anionic bis(2,4-dinitrophenyl) phosphate (BDNPP), giving 2,4-dinitrophenyl and dianionic by an SN2(Ar) reaction, at the phosphoryl center, 2,4-dinitrophenoxide ion a transient phosphorylated that rearranges intramolecularly to N-(2,4-dinitrophenyl)-N-phosphonohydrazine. Approximately 58% of reaction pD = 10 occurs N-phosphorylation, as shown 31P NMR spectroscopy. Reaction HO2- is wholly phosphorus, intermediate peroxophosphate intramolecularly, displacing...
The hydrolysis of methyl 8-dimethylamino-1-naphthyl phosphate 4 and its reactions with a representative range nucleophiles are catalyzed by the dimethylammonium group at acidic pH rate accelerations order 106. reaction persists up to 7 because strong intramolecular hydrogen bond, which is key efficient general acid catalysis, present also in reactant. sensitivity basicity nucleophile (Brønsted βnuc = 0.29) lies between values measured previously for mono- triesters. comparisons suggest that...
This paper introduces a new technique to recover the energy trapped in leakage inductor of current-fed push-pull converter, by means an active clamping mode circuit. Theoretical analysis and experimental results, taken from 800 W/40 kHz are presented paper. The studied converter also features ZVS (zero voltage switching) all switches, preserving main properties original As result, efficiency is improved electromagnetic disturbances minimized.