Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

Georgina Zimbitas; Anna Jawor-Baczynska; Maria Jazmin Vesga; Nadeem Javid; Barry D. Moore; John Parkinson; Jan Sefcik

doi:10.1016/j.colsurfa.2019.123633

Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

Georgina Zimbitas, Anna Jawor-Baczynska, Maria Jazmin Vesga, Nadeem Javid, Barry D. Moore, John Parkinson, Jan Sefcik

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Abstract

In this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100-150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.

Original language	English
Article number	123633
Number of pages	8
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	579
Early online date	2 Jul 2019
DOIs	https://doi.org/10.1016/j.colsurfa.2019.123633
Publication status	Published - 20 Oct 2019

Keywords

clustering
mesostructed liquid phase
glycine
scattering

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10.1016/j.colsurfa.2019.123633

Zimbitas-etal-CSA-2019-Investigation-of-molecular-and-mesoscale-clusters-in-undersaturatedFinal published version, 1.31 MBLicence: CC BY 4.0

Data for: "Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions"
Zimbitas, G. (Creator), University of Strathclyde, 19 Jul 2019
DOI: 10.15129/c7bb51a3-34aa-47a9-af5b-505c4682eaff
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abstract = "In this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100-150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.",

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T1 - Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

AU - Zimbitas, Georgina

AU - Jawor-Baczynska, Anna

AU - Vesga, Maria Jazmin

AU - Javid, Nadeem

AU - Moore, Barry D.

AU - Parkinson, John

AU - Sefcik, Jan

PY - 2019/10/20

Y1 - 2019/10/20

N2 - In this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100-150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.

AB - In this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100-150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.

KW - clustering

KW - mesostructed liquid phase

KW - glycine

KW - scattering

U2 - 10.1016/j.colsurfa.2019.123633

DO - 10.1016/j.colsurfa.2019.123633

M3 - Article

SN - 0927-7757

VL - 579

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

M1 - 123633

ER -

Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

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