Salt Specific Interaction Between RepresentativeHofmeister Salts and Glycine

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作者
Hamad Ashraf
GUO Ya-xin
ZHANG Yun-hong
机构
[1] TheInstituteofChemicalPhysics,SchoolofChemistryandChemicalEngineering,BeijingInstituteofTechnology
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中图分类号
O641 [结构化学]; O657.3 [光化学分析法(光谱分析法)];
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摘要
Abstract Traditionally,Hofmeister effect was understood on the basis of hydration abilities of ions.Recent studies found short-range structuring effects of ions on water which shifted the attention from ion-water interaction to ion-protein interaction.In this study,ATR-FTIR spectroscopy at different RH is used to study the effect of a representative Kosmotrope (MgSO4),Chaotrope (NH4NO3)and neutral(KCl)salt on glycine.The salting out,salting in and neutral effects of salts on glycine are found aligned with Hofmeister effect.Interestingly,direct interaction of kosmotrope anion (SO42-)with the glycine is observed experimentally which validates the recent idea of ion-protein interaction.Further detailed studies will be needed for deeper insight.
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页码:235 / 236
页数:2
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  • [1] The present state of affairs with Hofmeister effects[J] . W. Kunz,P. Lo Nostro,B.W. Ninham.Current Opinion in Colloid & Interface Science . 2004 (1)