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Ruben Martin – One of the best experts on this subject based on the ideXlab platform.
dual catalytic strategy for forging sp2 sp3 and sp3 sp3 architectures via β scission of Aliphatic Alcohol derivativesJournal of the American Chemical Society, 2020Co-Authors: Fei Cong, Craig S Day, Ruben MartinAbstract:
A dual platform for forging sp2-sp3 and sp3-sp3 carbon bonds via catalytic β-scission of Aliphatic Alcohol derivatives with both aryl and alkyl halides is disclosed. This protocol is distinguished by its wide substrate scope and broad applicability, even in the context of late-stage functionalization.
Basudam Adhikari – One of the best experts on this subject based on the ideXlab platform.
application of sulfuric acid doped poly m aminophenol as Aliphatic Alcohol vapor sensor materialSensors and Actuators B-chemical, 2009Co-Authors: Pradip Kar, Narayan C Pradhan, Basudam AdhikariAbstract:
Abstract Chemically synthesized processable poly ( m -aminophenol) (PmAP) film was cast from dimethyl sulfsulfoxide solution and doped with sulfuric acid by solution doping technique. This sulfuric acid doped PmAP film shows a good electrical conductivity. The response of doped film under continuous flow of various Aliphatic Alcohols vapor and air mixture was examined at room temperature (30 °C) and humidity (65% RH). The doped polymer only showed good result for methanol and ethanol vapor and some week response for the isopropanol vapor. A decrease in resistivity of the doped PmAP film was separately observed in air–Alcohol vapor at different concentrations. The response of the film increases as the concentration of the Alcohol vapor increases in air–Alcohols vapor mixture. The kinetics of the response with respect to the Alcohol concentration was studied for methanol and ethanol. Sulfuric acid doped and methanol vapor absorbed doped films were characterized by ultraviolet–visible spectroscopic, attenuated total reflectance Fourier transformed infrared spectroscopic and X-ray diffraction analyses. The mechanism of Alcohol vapor sensing by sulfuric acid doped PmAP film has been explained on the basis of the above characterizations. All the above facts are trying to explain from the proposed mechanistic point of view.
Andrew W. Knight – One of the best experts on this subject based on the ideXlab platform.
subtle effects of Aliphatic Alcohol structure on water extraction and solute aggregation in biphasic water n dodecaneLangmuir, 2017Co-Authors: Andrew W. Knight, Tori Z. Forbes, Baofu Qiao, R Chiarizia, Geoffroy Ferru, Ross J Ellis, L SoderholmAbstract:
Organic phase aggregation behavior of 1-octanol and its structural isomer, 2-ethylhexanol, in a biphasic n-dodecane–water system is studied with a combination of physical measurement, small-angle X-ray scattering (SAXS), and atomistic molecular dynamic simulations. Physical properties of the organic phases are probed following their mixing and equilibration with immiscible water phases. Studies reveal that the interfacial tension decreases as a function of increasing Alcohol concentration over the solubility range of the Alcohol with no evidence for a critical aggregate concentration (cac). An uptake of water into the organic phases is quantified, as a function of Alcohol content, by Karl Fischer titrations. The extraction of water into dodecane was further assessed as a function of Alcohol concentration via the slope-analysis method sometimes employed in chemical separations. This method provides a qualitative understanding of solute (water/Alcohol) aggregation in the organic phase. The physical results …
Trace-Level Extraction Behavior of Actinide Elements by Aliphatic Alcohol Extractants in Mineral Acids: Insights into the Trace Solution Chemistry of Protactinium, 2016Co-Authors: Andrew W. Knight, Eric S. Eitrheim, Andrew W. Nelson, Madeline Peterson, Daniel Mcalister, Tori Z. Forbes, Michael K. SchultzAbstract:
The extraction of actinide elements thorium, protactinium (Pa), uranium, neptunium, and americium by Aliphatic Alcohols (1-octanol, 2-ethyl–hexanol, and 2,6-dimethyl-4-heptanol) was investigated with solvent extraction and extraction chromatographic techniques from hydrochloric and nitric acid solutions. These systems provide the potential for low-cost, high quality methods for the isolation of Pa from complex matrices. Acid dependency experiments demonstrate the selective extraction of protactinium from hydrochloric and nitric acids, relative to the other actinides explored. Experiments were conducted to elucidate the equilibrium chemical stoichiometry of the protactinium complex that underlies this unique extraction behavior. Slope analysis with respect to the Alcohol concentration infers a stoichiometric relationship of 2:1 for the Alcohol extractant to the protactinium ion. Slope analysis with respect to the chloride ion (when [H+] = 0.1, 1, and 4 M) suggests that the stoichiometric identity of the protactinium chloro-complexes depends on the [H+] (0.1 M to 4 M). Extraction of Pa increases as the Pa:Cl ratio increases from 1:2, at low acid concentration, to 1:6 at high acid concentration. With respect to the nitrate ion (when [H+] = 1 and 4 M), the stoichiometric relationship was determined to be 2:1 nitrate to protactinium throughout the range investigated. The sum of these findings and observations contribute to a deeper understanding of the unique chemistry of protactinium compared to the other members of the actinide group.
D Vollhardt – One of the best experts on this subject based on the ideXlab platform.
comparison of surface tension auto oscillations in fatty acid water and Aliphatic Alcohol water systemsMaterials Science and Engineering: C, 2002Co-Authors: N M Kovalchuk, D VollhardtAbstract:
Abstract The new phenomenon of surface tension auto-oscillations can be initiated by using fatty acids as surface active substances. The oscillation characteristics of the adequate surfactant systems fatty acid–water and Aliphatic Alcohol–water having the same alkyl chain length, are compared. The results show that the buoyancy should be taken into account if the solubility of the surfactant is large enough and its density differs sufficiently from the density of water. In general, the behavior of the system fatty acid–water is more complicated than the earlier studied Aliphatic Alcohol–water systems.
Byron D Gates – One of the best experts on this subject based on the ideXlab platform.
determining the thickness of Aliphatic Alcohol monolayers covalently attached to silicon oxide surfaces using angle resolved x ray photoelectron spectroscopyApplied Surface Science, 2018Co-Authors: Austin W H Lee, Dongho Kim, Byron D GatesAbstract:
Abstract The thickness of Alcohol based monolayers on silicon oxide surfaces were investigated using angle-resolved X-ray photoelectron specspectroscopy (ARXPS). Advantages of using Alcohols as building blocks for the formation of monolayers include their widespread availability, ease of handling, and stability against side reactions. Recent progress in microwave assisted reactions demonstrated the ease of forming uniform monolayers with Alcohol based reagents. The studies shown herein provide a detailed investigation of the thickness of monolayers prepared from a series of Aliphatic Alcohols of different chain lengths. Monolayers of 1-butanol, 1-hexanol, 1-octanol, 1-decanol, and 1-dodecanol were each successfully formed through microwave assisted reactions and characterized by ARXPS techniques. The thickness of these monolayers consistently increased by ∼1.0 A for every additional methylene (CH2) within the hydrocarbon chain of the reagents. Tilt angles of the molecules covalently attached to silicon oxide surfaces were estimated to be ∼35° for each type of reagent. These results were consistent with the observations reported for thiol based or silane based monolayers on either gold or silicon oxide surfaces, respectively. The results of this study also suggest that the Alcohol based monolayers are uniform at a molecular level.