A5068452498- Fluorine in Organic Chemistry
- Sulfur-Based Synthesis Techniques
- Chemical Synthesis and Reactions
- Chemical Synthesis and Analysis
- Analytical Chemistry and Chromatography
- Inorganic Fluorides and Related Compounds
- Synthesis and Biological Evaluation
- Crystallization and Solubility Studies
- Organic and Inorganic Chemical Reactions
- Organic Chemistry Cycloaddition Reactions
- Porphyrin and Phthalocyanine Chemistry
- Synthesis and Reactions of Organic Compounds
- Synthesis and Catalytic Reactions
- Phenothiazines and Benzothiazines Synthesis and Activities
- Analytical Chemistry and Sensors
- X-ray Diffraction in Crystallography
- Molecular spectroscopy and chirality
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Chemical Reaction Mechanisms
- Oxidative Organic Chemistry Reactions
- Ionic liquids properties and applications
- Electrochemical sensors and biosensors
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Per- and polyfluoroalkyl substances research
- Molecular Sensors and Ion Detection
Eötvös Loránd University
2011-2023
Institute for Soil Sciences
2019
Division of Chemistry
2018
University of Minnesota
2005-2009
Texas A&M University
2008
Friedrich-Alexander-Universität Erlangen-Nürnberg
2006-2008
Egis (France)
1999
ExxonMobil (United States)
1994-1998
Institute of Organic Chemistry
1978-1997
University of Toronto
1988
A novel concept for performing stoichiometric and catalytic chemical transformations has been developed that is based on the limited miscibility of partially or fully fluorinated compounds with nonfluorinated compounds. fluorous biphase system (FBS) consists a phase containing dissolved reagent catalyst another phase, which could be any common organic nonorganic solvent no solubility in phase. The defined as fluorocarbon (mostly perfluorinated alkanes, ethers, tertiary amines)-rich system....
The hydroformylation of decene-1 was studied in the presence fluorous-soluble P[CH2CH2(CF2)5CF3]3 modified rhodium catalyst at 100 °C and 1.1 MPa CO/H2 (1:1) a 50/50 vol % toluene/C6F11CF3 solvent mixture, which forms homogeneous liquid phase above °C. selected on basis semiempirical calculation electronic properties P[(CH2)x(CF2)yCF3]3 (x = 0, y 2, 4 x 0−5, 2) prepared by reaction PH3 with CH2CH(CF2)5CF3. solution structure HRh(CO){P[CH2CH2(CF2)5CF3]3}3 (1) C6F11CF3 is similar to that...
Ionophore-doped sensor membranes exhibit greater selectivities and wider measuring ranges when they are prepared with noncoordinating matrixes. Since fluorous phases the least polar polarizable liquid known, a phase was used for this work as membrane matrix series of ionophore-based sensors to explore ultimate limit selectivity. Fluorous pH electrode membranes, each comprised perfluoroperhydrophenanthrene, sodium tetrakis[3,5-bis(perfluorohexyl)phenyl]borate, one four fluorophilic...
Fluorous media are the least polar and polarizable condensed phases known. Their use as membrane materials considerably increases selectivity robustness of ion-selective electrodes (ISEs). In this research, a fluorous amorphous perfluoropolymer was used for first time matrix an ISE membrane. Electrodes pH measurements with membranes composed poly[4,5-difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole]-co-poly(tetrafluoroethylene) (87% dioxole monomer content; known Teflon AF2400) polymer matrix,...
Despite the widespread use of perfluorinated solvents with amino and ether groups in a variety application fields, coordinative properties these compounds are poorly known. It is generally assumed that electron withdrawing moieties render functional rather inert, but little known quantitatively about extent their inertness. This paper reports on interactions between inorganic monocations perfluorotripentylamine 2H-perfluoro-5,8,11-trimethyl-3,6,9,12-tetraoxapentadecane, as determined...
Three chiral α-(nonafluoro-tert-butoxy)carboxylic acids (R)-1, (RS)-2, (R)-3 were synthesized to examine their application as solvating agents with amines. As a model compound, first (S)- and/or (RS)-α-phenylethylamine was used, and diastereomeric salts investigated by 1H 19F NMR ECD spectroscopy. The spectroscopic studies carried out at room temperature using the slightly polar CDCl3 apolar C6D6 solvents in 5 mM 54 concentrations. difference of chemical shifts (Δδ) complexes is comparable...
Some previously synthesized (perfluoroalkyl)alkyldimorpholinophosphates, CnF2n+1CmH2mOP(O)- [N(CH2CH2)2O]2, were found remarkably to stabilize heat sterilizable water-in-fluorocarbon reverse emulsions and have a strong proclivity self-aggregate into microtubular assemblies when dispersed in water. This series has now been extended order allow structure–property relationships be established product optimization achieved. A new of even more fluorophilic compounds consisting...
Various sulfides can be oxidized selectively to the corresponding sulfoxides in high yields using phenyltrimethylammonium tribromide aqueous pyridine solution. This method allows 18O- labelled prepared with no loss of isotope enrichment (18O)water used.
A series of symmetrical diaryl sulfides has been prepared by the coppercatalyzed reaction 3-mercaptopropionic acid with unactivated aryl iodides. The yields are comparable those obtained using anhydrous sodium sulfide under optimized conditions.
Three novel diaryldiacyloxyspirosulfuranes (2–4) with five-, six- and seven-membered spirorings have been prepared, their molecular structures determined by X-ray diffraction. The structure of spirosulfurane 1 two identical five-membered has reinvestigated. In all spirosulfuranes 1–4 the arrangement ligands about central sulfur atom show a slightly distorted trigonal bipyramidal (TBP) geometry resulting in chiral structure. axial (hypervalent) S–O equatorial (covalent) S–Car bond lengths...
The ability of surfactant-like compounds to inhibit the corrosion aluminum in NaCl solution was systematically investigated. basic idea this study scrutinize effect type backbone chain (alkyl and perfluoroalkyl), length (number carbon atoms 7, 10, 17), various anchor groups (carboxylic, thiol, imidazole) presence alkylene benzene spacers between perfluoroalkyl group. To tackle these effects, three model studies were designed for alkaline etched, superhydrophilic surface then approached...
Density functional theory computations have been performed on the oxidations of sulfides and sulfoxides with hypochlorite ion (OCl − ), hypochlorous acid, alkyl hypochlorites to study mechanism reactions. The OCl anion transforms sulfones in oxygen transfers. atom QOCl (Q = H, Me, t ‐Bu) attacks at sulfur substrates, oxysulfonium cation intermediates are formed; departure leaving Cl is catalyzed by soft Lewis acids. structures early transition states determined highest occupied molecular...
Preliminary experiments devoted to the reaction of model sulfides with several oxidation reagents under mechanochemical conditions are presented. No sodium metaperiodate and (−)-(8,8-dichlorocamphorylsulfonyl)oxaziridine was observed. An interesting selectivity observed in aryl trifluoromethyl hydrogen peroxide presence tungstic phosphoric acid as a catalyst. Asymmetric induction has been during methyl phenyl sulfide corresponding sulfoxide carried out d-camphorsulfonic or beta-cyclodextrin.