Showing 1-30 of 981 results for "solvation"
Olga A Francisco et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 21(6), 484-493 (2020-01-17)
The solubility of hydrophobic molecules in water is sensitive to salt addition in an ion-specific manner. Such "salting-out" and "salting-in" properties have been shown to be a major contributor to the measured ion-specific Hofmeister effects that are observed in many...
Guang Yang et al.
ACS nano, 12(10), 10159-10170 (2018-09-19)
Understanding the fundamental factors that drive ion solvation structure and transport is key to design high-performance, stable battery electrolytes. Reversible ion solvation and desolvation are critical to the interfacial charge-transfer process across the solid-liquid interface as well as the resulting...
He Nan et al.
Analytical and bioanalytical chemistry, 410(19), 4597-4606 (2017-12-24)
Ionic liquids (IL) have been utilized as gas chromatography stationary phases due to their high thermal stability, negligible vapor pressure, wide liquid range, and the ability to solvate a range of analytes. In this study, the solvation properties of eight...
William M Penny et al.
Electrophoresis, 38(5), 738-746 (2016-11-20)
Phospholipid bilayer nanodiscs composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine and synthetic maleic acid-styrene copolymer belts have been introduced as a pseudostationary phase (PSP) in electrokinetic chromatography and demonstrated good performance. The nanodiscs provide a suitable migration range and high theoretical plate counts. Using...
M A Statkus et al.
Talanta, 188, 365-369 (2018-07-22)
Retention of 17 organic compounds was studied in high-temperature liquid chromatography mode on Hypercarb porous graphitic carbon with subcritical water as an eluent. Three different eluent temperatures were studied: 150, 175 and 200 °C. Abraham solvation parameters model was used for...
Evanildo G Lacerda et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 20(1), 78-91 (2018-11-20)
Prediction of chemical shifts in organic cations is known to be a challenge. In this article we meet this challenge for α-protonated alkylpyrroles, a class of compounds not yet studied in this context, and present a combined experimental and theoretical...
Fabrice Gritti et al.
Journal of chromatography. A, 1356, 96-104 (2014-07-08)
Computer calculations of gradient chromatograms were performed by taking into account the adsorption behavior of the strong eluent in RPLC and the true Henry constant of the analytes. This improves the accuracy of classical gradient calculations, which all assume no...
James T Muckerman et al.
Biochimica et biophysica acta, 1827(8-9), 882-891 (2013-04-10)
We present a simple approach for the calculation of accurate pKa values in water and acetonitrile based on the straightforward calculation of the gas-phase absolute free energies of the acid and conjugate base with use of only a continuum solvation...
Matias I Sancho et al.
International journal of molecular sciences, 12(12), 8895-8912 (2012-01-25)
The solvatochromic characteristics of flavone and 7-hydroxyflavone were investigated in neat and binary solvent mixtures. The spectral shifts of these solutes were correlated with the Kamlet and Taft parameters (α, β and π*) using linear solvation energy relationships. The multiparametric...
Shivraj et al.
Luminescence : the journal of biological and chemical luminescence, 32(7), 1328-1338 (2017-06-06)
The UV/Vis absorption and fluorescence characteristics of 3-cyano-7-hydroxycoumarin [CHC] and 7-amino-4-methyl-3-coumarinylacetic acid [AMCA-H] were studied at room temperature in several neat solvents and binary solvent mixtures of 1,4-dioxane/acetonitrile. The effects of solvent on the spectral properties are analyzed using single...
Inga L Topolnicki et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 15(12), 2485-2489 (2014-05-28)
The partitioning constants and Gibbs free energies of transfer of poly(oxyethylene) n-alkyl ethers between dodecane and the protic ionic liquids (ILs) ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) are determined. EAN and PAN have a sponge-like nanostructure that consists of...
Jiangpu Hu et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 16(11), 2357-2365 (2015-05-29)
The photophysical properties of intramolecular charge transfer (ICT) in a novel tribranched donor-π-acceptor chromophore, triphenoxazine-2,4,6-triphenyl-1,3,5-triazine (tri-PXZ-TRZ), with thermally activated delayed fluorescence character was investigated in different aprotic solvents by steady-state spectroscopy and femtosecond and nanosecond transient absorption spectroscopy measurements. Increasing...
Syame Khater et al.
Journal of chromatography. A, 1363, 278-293 (2014-07-19)
The majority of published enantiomeric separations by supercritical fluid chromatography (SFC) utilize chiral stationary phases (CSP) based on chemically derivatized amylose or cellulose, coated or immobilized on silica. There is a large diversity among these polysaccharide-type CSP enhancing the scope...
M Ashtari et al.
Journal of chromatography. A, 1409, 89-107 (2015-07-30)
Molecular dynamics simulations are employed to examine the selectivity of four proline-based chiral stationary phases in two solvent environments, a relatively apolar n-hexane/2-propanol solvent and a polar water/methanol solvent. The four chiral surfaces are based on a BOC-terminated diproline, a...
Tiina Laaksonen et al.
Molecules (Basel, Switzerland), 20(11), 20873-20886 (2015-11-28)
Chiral tertiary and quaternary amine solvating agents for NMR spectroscopy were synthesized from the wood resin derivative (+)-dehydroabietylamine (2). The resolution of enantiomers of model compounds [Mosher's acid (3) and its n-Bu₄N salt (4)] (guests) by (+)-dehydroabietyl-N,N-dimethylmethanamine (5) and its...
Wei Xu et al.
Journal of pharmaceutical sciences, 104(4), 1256-1262 (2015-02-14)
Cabazitaxel is an anticancer drug and its marketed product (form A) is acetone solvate (1:1) (Didier E, Perrin MA. 2005. Patent WO2005/028462 A1). This work describes three crystal structures of cabazitaxel 1:1 solvates with isopropyl alcohol (B), 2-butanol (C), and...
Petronela Pascariu Dorneanu et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 134, 218-224 (2014-07-12)
Absorption and fluorescence spectra of a polyquinoneimine, PQI, built on 1,4-dihydroxyanthraquinone and a siloxane diamine, 1,3-bis(amino-phenylene-ester-methylene)tetramethyldisiloxane, have been investigated in solvents of different polarities. The effect of solvents on the spectral properties was investigated using Lippert-Mataga and Bakhshiev polarity functions...
Jesse S Hyslop et al.
Analytica chimica acta, 1000, 293-302 (2018-01-01)
The fundamental relationships between the structure and chemistry of latex nanoparticles synthesized by reversible addition fragmentation chain transfer (RAFT) controlled living polymerization and their subsequent performance as pseudostationary phases (PSP) are reported in this paper. RAFT enables the rational optimization...
Sneha Paul et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 18(15), 2058-2064 (2017-04-19)
DNA dynamics, to which water, counterions, and DNA motions contribute, is a topic of considerable interest because it is closely related to the efficiency of biological functions performed by it. Simulation studies and experiments suggest that the counterion dynamics in...
Alison E Dowey et al.
Chirality, 28(4), 299-305 (2016-02-18)
Cationic trialkylammonium-substituted α-, β-, and γ-cyclodextrins containing trimethyl-, triethyl-, and tri-n-propylammonium substituent groups were synthesized and analyzed for utility as water-soluble chiral nuclear magnetic resonance (NMR) solvating agents. Racemic and enantiomerically pure (3-chloro-2-hydroxypropyl)trimethyl-, triethyl-, and tri-n-propyl ammonium chloride were synthesized...
Paroma Chakravarty et al.
Molecular pharmaceutics, 12(7), 2551-2557 (2015-05-28)
The purpose of this study was to identify and characterize precipitates obtained from a liquid formulation of GNE068.HCl, a Genentech developmental compound, and lipophilic excipients, such as propylene glycol monocaprylate, and monolaurate. Precipitates were characterized using powder X-ray diffractometry (PXRD)...
Martin Brehm et al.
Molecules (Basel, Switzerland), 25(15) (2020-08-05)
We present 1,2,3-triazolium- and imidazolium-based ionic liquids (ILs) with aromatic anions as a new class of cellulose solvents. The two anions in our study, benzoate and salicylate, possess a lower basicity when compared to acetate and therefore should lead to...
Zoltán Szakács et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 21(15), 1718-1730 (2020-05-18)
Upon photoexcitation, a majority of quadrupolar dyes, developed for large two-photon absorption, undergo excited-state symmetry breaking (ES-SB) and behave as dipolar molecules. We investigate how the change of quadrupole moment upon S1 ←S0 excitation, ΔQ, influences the propensity of a...
Mingliang Zhang et al.
Journal of chromatography. A, 1365, 148-155 (2014-09-25)
One-pot synthesis of surface-confined ionic liquid functionalized silica spheres was proposed using N-(3-aminopropyl)imidazole, γ-isopropyltriethoxysilane and 1-bromooctadecane as starting materials. The surface modification of the silica spheres was successful with a high surface density of octadecylimidazolium, enabling the utilization of this...
Caroline West et al.
Journal of chromatography. A, 1412, 126-138 (2015-08-19)
Pentafluorophenyl-bonded silica (PFP) phases employed in high-performance liquid chromatography (HPLC) often provide very different results depending on the column manufacturer. PFP phases also provide significantly different selectivity from non-fluorinated aromatic phases. As all HPLC columns can also be employed with...
Kai Hu et al.
Talanta, 130, 63-70 (2014-08-28)
A new stationary phase for high-performance liquid chromatography was prepared by covalently bonding a V-shape cage heteroatom-bridged calixarene onto silica gel using 3-aminopropyltriethoxysilane as coupling reagent. The structure of the new material was characterized by infrared spectroscopy, elemental analysis and...
Lizhen Qiao et al.
Journal of separation science, 43(6), 1071-1079 (2019-12-29)
Surface-bonded zwitterionic stationary phases have shown highlighted performances in separation of polar and hydrophilic compounds under hydrophilic interaction chromatography mode. So, it would be helpful to evaluate the characteristics of zwitterionic stationary phases with different arranged charged groups. The present...
Qing Fu et al.
Journal of chromatography. A, 1593, 127-134 (2019-03-20)
Supercritical fluid chromatography (SFC) today represents an alternative technique in analytical chemistry due to its obvious benefits in kinetic performance and its complementarity to liquid chromatography. In this paper, a series of alkylsiloxane-bonded stationary phases were synthesized and evaluated to...
Syame Khater et al.
Journal of chromatography. A, 1373, 197-210 (2014-12-09)
In enantioselective supercritical fluid chromatography (SFC) with chiral stationary phases (CSP), the elution strength of carbon dioxide is usually modulated by the use of polar organic solvents, also called modifiers. Alcohols like methanol, ethanol and isopropanol are the most commonly...
Gabriel A Odugbesi et al.
Journal of chromatography. A, 1604, 460466-460466 (2019-09-03)
Ionic liquids (ILs) are well-known in the field of separation science for their unique selectivity when used as stationary phases in gas chromatography (GC). While a significant amount of knowledge has been attained in correlating structural features of an IL...

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