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Showing 1 to 20 of 907 for “"anion"”.
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Induced-Fit Anion Sensing
Anions have many important roles in biological systems, as well as in the environment and as such there is significant interest in their binding and sensing. In induced-fit anion sensing, the binding of an anion causes a shift in the equilibrium of conformers of the molecule, which in turn may lead …
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Anion-Tuning of Supramolecular Gel Properties
… supramolecular and biological chemists. Anion tuning of these supramolecular gels is a burgeoning field of study. Two classes of compounds, chiral bisureas and urea derivatised pyrazoles are studied. The synthesized chiral bisurea compounds act as gelators in a variety of solvents. …
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Anion manipulation in perovskite-related materials
… higher fluorine content sections, the fluorine anions displace oxygen anions from their apical positions into the equatorial vacancies, thus destroying the superstructure and giving a K\(_2\)NiF\(_4\) type structure (\(a\) = 3.8210(1) Å and \(c\) = 12.686(1) Å). Ce\(_2\)MnN\(_3\)F\(_{2-δ}\) with …
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On Competitive Adsorption of Oxyanions by Soils (Freundlich Equation, Enthalphy of Adsorption, Selectivity Coefficient, Anion Mixtures, Anion)
The adsorption behavior of anionic mixtures (binary-solute combinations of arsenate, molybdate, and phosphate) by three soil samples (Cecil clay, EPA-14, and Catlin silt loam) was investigated using batch equilibrium techniques. The adsorption of arsenate and molybdate by all three soils was …
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Anion exchange chromatographic analysis with conductometric detection
Thesis (M.S.)--Michigan State University. Dept. of Chemistry, 1971
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Vibrational spectroscopy of cation and anion channelrhodopsins
… rhodopsins. Cation channelrhodopsins (CCRs) and anion channelrhodopsins (ACRs) have been demonstrated to activate and silence cell activity, respectively. In this dissertation, the molecular mechanisms of two channelrhodopsins are studied: a CCR from Chlamydomonas augustae (CaChR1) and an ACR …
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Mixed anion complex hydrides for hydrogen storage
The first examples of a new class of mixed anion complex hydride have been synthesised and characterised. The structures of three amide-borohydride complex hydrides of lithium and sodium, Li\(_4\)BH\(_4\)(NH\(_2\))\(_3\), Li\(_2\)BH\(_4\)NH\(_2\) and Na\(_2\)BH\(_4\)NH\(_2\), have been solved by …
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Characterization of Silicotungstate Anion Modified Metal Surfaces
Multilayer-like features were observed on Ag surfaces when the potential was cycled negative of the onset of the first redox couple of alpha-H 4SiW12O40. QCM measurements suggested that negative potentials attracted alpha-SiW12O404- near Ag surfaces. XPS data qualitatively indicated that more …
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Site-Selective Anion Exchange in a Palladophosphorane
Reported here are studies on the chemoselective ligand substitution at a palladophosphorane possessing two potential sites of chloride substitution. Ligation of palladium(II) chloride with a tridentate chelating ligand (L, P(N(o-N(2-pyridyl)C₆H₄)₂) results in formation of a complex comprising a d⁸ …
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Radical anion rearrangements. aryl cyclopropyl ketyl anions
… can be ascribed to the intermediacy of a ketyl anion. Through a detailed examination of the decay of electrolytically generated aryl cyclopropyl] ketyl anions, we have shown that the assumptions made in the use of these substrates as SET probes are not necessarily valid. Using derivative cyclic …
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Ni Stability in Anion Exchange Membrane Fuel Cells
… platinum group metal (PGM) catalysts. An anion exchange membrane fuel cell (AEMFC) is one of many alternatives. The AEMFC provides an alkaline environment that enables the use of many non-platinum group metal (non-PGM) catalysts. This grants AEMFCs the potential to become Pt-free and thus …
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Anion effects in Homogeneous Palladium and Gold Catalysis
… both traditional and novel weakly-coordinating anions. Understanding of these interactions will better allow synthetic chemists to choose appropriate counterions for catalytic transformations, as well as giving mechanistic insight for organometallic reactivity. Additionally, new anions can be …
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Anion-induced zwitterion formation in gas-phase arginine
… structure of gas-phase arginine by simple anions in the gas-phase. Mass spectrometry (MS) experiments conducted in a quadrupole ion trap (QIT) are presented. In these experiments, the loss of ammonia as opposed to water from the Br-•Arg cluster suggests that the arginine within the cluster …
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Building Metal-Anion Layers within a Preovskite Host
Alkali metal halide layers were constructed within Dion-Jacobson (DJ) layered perovskites by a two-step sequential intercalation method. Reductive intercalation with an alkali metal, followed by oxidative intercalation with chlorine gas, leads to the formation of compounds of the general formula, …
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Towards Responsive Squaramides: Anion Recognition, Sensing, and Transport
Anions play a crucial role in both biological and environmental contexts to such an extent where the absence or the overabundance of anions can lead to severe health implications and environmental concerns. The recognition of the universal significance of anions has led to an explosion of research …
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Characterization of a human renal organic anion transporter
The renal excretion of organic anions, including a variety of endogenous substances, xenobiotics and their metabolites, involves an organic anion transport system with multiple specificity. The well characterized basolateral uptake step of this process involves the organic anion transporter 1 …
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Some factors affecting anion retention in acid soils
… of pH, time of equilibration, and the effect of anions themselves in the anion retention in an acid red soil. It was found that chloride was held much less tightly than sulfate by soils. It was also noted that more sulfate was retained at higher concentration. A time factor was also noted in this …
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