Synthesis, Characterization, and Utility of Trialkyl(3-sulfopropyl)ammonium Betaines as New Phase Transfer Reagents
摘要:
Synthesis of water-soluble phase transfer reagents, trialkyl(3-sulfopropyl)ammonium betaines and its utility in various hydroxide-ion initiated reactions are described.
Room temperature deep eutectic solvents of (1S)-(+)-10-camphorsulfonic acid and sulfobetaines: hydrogen bond-based mixtures with low ionicity and structure-dependent toxicity
ionicity of these mixtures. A FTIR-based bioassay was performed to determine the toxicity of these mixtures on eukaryotic model cells (Saccharomyces cerevisiae). The DESs showed merely a dehydrating effect on the cells, similar to that produced by CaCl2, a low cell toxicity salt. This supports these DESs as promising green media. Amphiphilic SBs DESs showed a stronger effect on the cells and a structure-activity
作者:Mark T. Storr、Paul C. Taylor、Jean-Pierre Monfort、P. Mark Rodger
DOI:10.1021/ja035243g
日期:2004.2.1
We present the results of a combined theoretical/experimental study into a new class of kinetic inhibitor of gas hydrate formation. The inhibitors are based on quaternary ammonium zwitterions, and were identified from a computational screen. Molecular dynamics simulations were used to characterize the effect of the inhibitor on the interface between a type II hydrate and natural gas. These simulations show that the inhibitor is bifunctional, with the hydrophobic end being compatible with the water structure present at the hydrate interface, while the negatively charged functional group promotes a long ranged water structure that is inconsistent with the hydrate phase; the sulfonate-induced structure was found to propagate strongly over several solvation shells. The compound was subsequently synthesized and used in an experimental study of both THF and ethane hydrate formation, and was shown to have an activity that was comparable with an existing commercial kinetic inhibitor: PVP.
Conversion of cellulose into levulinic acid under the catalysis of Brønsted acidic ionic liquid and erbium chloride in water