Hofmeister effects: an explanation for the impact of ionic liquids on biocatalysis

Yang, Zhen

doi:10.1016/j.jbiotec.2009.04.011

Cited by 359 publications

(203 citation statements)

References 87 publications

(99 reference statements)

Supporting

Mentioning

184

Contrasting

Unclassified

Order By: Relevance

“…[26,34,35] Two basic hypotheses on how Hofmeister ions affect the aggregation and self-assembly behaviour of macromolecular solutes in aqueous solution have been put forward: (1) indirect mechanism of action -by interacting with water around the macromolecules; (2) direct mechanism of action -by interacting directly with the macromolecules. [36] Anions were found to have a much greater impact on protein solubility than cations. [37] The indirect mechanism concerns the various ions' ability to make or break hydrogen bonds (known as kosmotropic or chaotropic behaviour, respectively).…”

Section: Resultsmentioning

confidence: 99%

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

Wang

2017

Environ. Chem.

View full text Add to dashboard Cite

Environmental context. Lipids released from lysis of phytoplankton cells are enriched in the sea surface microlayer. Such surface-active organics can be transferred through bursting bubbles to sea-spray aerosols where they can influence atmospheric chemistry. The results presented here suggest that phospholipids combine more readily with SO 4 2À than with Br À , leading to enrichment of organic-coated sulfate salts in marine aerosols.Abstract. Inorganic salts and organic matter are known to be present at higher levels in the sea surface microlayer and marine aerosols; however, the impact of common anions on their surface properties is not well understood. Here, a 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) monolayer was enriched with the sodium and ammonium salts of different anions (Br À , Cl À , NO 3 À , SO 4 2À , CH 3 COO À , and HCO 3 À ), and the effects on the surface properties of the monolayer were investigated. The monolayer phase behaviour and the structure of the lipid phases were studied by surface pressure-area (p-A) isotherms and infrared reflection-absorption spectroscopy (IRRAS). The presence of salts in the subphase was found to increase the surface pressure of the DPPC monolayer at a fixed area per molecule. The effect of the anions follows the order of the Hofmeister series. The higher concentration of salt solution caused the p-A isotherm to shift to larger area. The IRRAS spectra demonstrate that the ordering of the DPPC molecules in the liquid condensed phase remains essentially unaffected, even at higher electrolyte concentrations. DPPC molecules combined with SO 4 2À could be transferred from the ocean to sea spray aerosol. The present study finds that the anions have significant influence on the surface organisation and, consequently, the interfacial properties, of the surface-active species at the air-water interface, a finding that has further implications for atmospheric aerosol nucleation.

show abstract

Section: Resultsmentioning

confidence: 99%

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

Wang

2017

Environ. Chem.

View full text Add to dashboard Cite

show abstract

“…The plot clearly shows that for KCl, KClO 4 and KBr ion-association takes place at a different extent. On the other hand, the plot for KI lies above the limiting tangent, suggesting that in this case ion pairs are not formed (see Fig.…”

Section: Conductivity Measurementsmentioning

confidence: 97%

“…The ion effect is usually quantified and organized in a specific trend, which may parallel one or more ion properties such as the size, charge, polarizability, partial molar volume, etc. In particular, Hofmeister studied the precipitation of egg yolk albumin from aqueous dispersions upon the addition of some sodium salts, and discovered that their effect can be ordered according to the following ranking for anions (at fixed cation) [1,2]: SO 4 2-> PO 4 3-> F -> Cl -> Br -> I -> NO 3 -> ClO 4 -Indeed, Hofmeister phenomena are not restricted to aqueous environments. Some studies have shown the occurrence of specific ion effects in water-free systems, for example, the solubility of salts in organic polar solvents [3], the physico-chemical properties of ionic liquids [4,5], the bubble-bubble coalescence in different organic liquids [6], and the activity of enzymes in non-aqueous media [7].…”

Section: Introductionmentioning

confidence: 99%

The Solvation of Anions in Propylene Carbonate

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Eles têm apontado como excelentes catalisadores para reações de síntese orgânica, incluindo a transesterificação e esterificação de ácidos graxos (DAS et al, 2014;FANG, YANG, JIAO, 2011) e podem ser facilmente recuperados e reutilizados com baixa geração de subprodutos e ausência de solventes orgânicos (YANG, 2009). …”

Section: Prospecção Para Obtenção De Biodiesel Empregando óLeo De Babunclassified

Prospecção Para Obtenção De Biodiesel Empregando Óleo De Babaçu (Orbigynia Martiniana) E De Óleo De Soja (Glycine Max) Utilizando Líquido Iônico Como Catalisador

Santos¹,

Araújo²,

Mendonça³

et al. 2017

RGEINTEC

View full text Add to dashboard Cite

show abstract

Hofmeister effects: an explanation for the impact of ionic liquids on biocatalysis

Cited by 359 publications

References 87 publications

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

Impact of anions on the surface organisation of lipid monolayers at the air–water interface

The Solvation of Anions in Propylene Carbonate

Prospecção Para Obtenção De Biodiesel Empregando Óleo De Babaçu (Orbigynia Martiniana) E De Óleo De Soja (Glycine Max) Utilizando Líquido Iônico Como Catalisador

Contact Info

Product

Resources

About