What is the fundamental ion-specific series for anions and cations? Ion specificity in standard partial molar volumes of electrolytes and electrostriction in water and non-aqueous solvents

Mazzini, Virginia; Craig, Vincent S. J.

doi:10.1039/c7sc02691a

Cited by 125 publications

(139 citation statements)

References 83 publications

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“…[8][9] Specific ion effects make modeling these processes difficult; a thorough understanding of the molecular-scale interactions that govern them is necessary. 10 Here, vibrational sum frequency generation (VSFG) spectra reveal a novel interfacial water structure due to the adsorption of PtCl6 2complexes at a soft charged interface. MD simulations show that this structure is due to PtCl6 2partially retaining its hydration sphere after closely adsorbing to the interface.…”

Section: Introductionmentioning

confidence: 98%

Heavy Anionic Complex Creates a Unique Water Structure at a Soft Charged Interface

et al. 2018

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Ion hydration and interfacial water play crucial roles in numerous phenomena ranging from biological to industrial systems. Although biologically relevant (and mostly smaller) ions have been studied extensively in this context, very little experimental data exist about molecular scale behavior of heavy ions and their complexes at interfaces, especially under technologically significant conditions. It has recently been shown that PtCl6 2complexes adsorb at positively charged interfaces in a two-step process that cannot fit into well-known empirical trends, such as Hofmeister series. Here, a combined vibrational sum frequency generation and molecular dynamics study reveals that a unique interfacial water structure is connected to this peculiar adsorption behavior. A novel sub-ensemble analysis of MD simulation results show that after adsorption, PtCl6 2complexes partially retain their first and second hydration spheres, and it is possible to identify three different types of water molecules around them based on their orientational structures and hydrogen bonding strengths. These results have important implications for relating interfacial water structure and hydration enthalpy to the general understanding of specific ion effects. This in turn influences interpretation of heavy metal ion distribution across and reactivity within, liquid interfaces.

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Section: Introductionmentioning

confidence: 98%

Heavy Anionic Complex Creates a Unique Water Structure at a Soft Charged Interface

et al. 2018

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“…23 In order to evaluate the salt effect, we performed reactions with a salt known to have a salt-out (LiCl) or salt-in (KCl) effect based on the Hofmeister series with a higher salt concentration (400 mM). 25 These experiments indicated that for both the hydrazone and oxime-formation reactions, LiCl accelerated the reaction rate, suggesting a salt-out effect, whereas KCl reduced the rate as compared to the NaCl catalyzed reaction ( Fig. 2c and d).…”

Section: Resultsmentioning

confidence: 79%

Influence of ions to modulate hydrazone and oxime reaction kinetics to obtain dynamically cross-linked hyaluronic acid hydrogels

et al. 2019

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“…On the same manner, similar densities correspond to similar solid residue values, the slightly higher density observed for Acqua Rocchetta being in line with its solid residue which slightly higher than that of the Reference Mineral Water. Thus, it seems that the ions total amount is the fundamental properties in regulating the density of mineral water; specific effects exerted by selected ions, reported in the literature (Mazzini & Craig, 2017), play a minor role.…”

Section: Resultsmentioning

confidence: 99%

Ion specificity in determining physico-chemical properties of drinking water

et al. 2019

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Drinking water plays a key role in regulating the daily salt intake, thus potentially affecting (either in positive or in negative direction) the incidence of diet-related pathologies, including nephrolithiasis. Being regarded as wholesome, bottled water is increasingly preferred to tap water. However, its physico-chemical characterization, as reported on the label, is usually limited to pH and conductivity measurements, along with ion content. Dther parameters, which also are likely to influence the processes in which water is involved in the body, are usually neglected. On this work, the surface tension and density of tap water and two bottled mineral waters produced in Otaly are investigated. These parameters are critically determined by the ion content. Density is connected to the total ion amount, while surface tension is differentially affected by the presence of specific ionsI: sulfate increases its value, while bicarbonate keeps it almost constant. These results furnish a reliable scientific basis for future investigation on the connection between the physico-chemical properties of drinking water and its effect on health. Particularly, since interfacial phenomena play a key role in kidney stone formation, our results suggest that dietary enrichment of selected ions due to water intake could affect nephrolithiasis.

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What is the fundamental ion-specific series for anions and cations? Ion specificity in standard partial molar volumes of electrolytes and electrostriction in water and non-aqueous solvents

Abstract: Consistent trends in ion-specificity across many solvents.

Cited by 125 publications

References 83 publications

Heavy Anionic Complex Creates a Unique Water Structure at a Soft Charged Interface

Heavy Anionic Complex Creates a Unique Water Structure at a Soft Charged Interface

Influence of ions to modulate hydrazone and oxime reaction kinetics to obtain dynamically cross-linked hyaluronic acid hydrogels

Ion specificity in determining physico-chemical properties of drinking water

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