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

Research output: Contribution to journalArticle

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.
LanguageEnglish
Article number123633
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume579
Early online date2 Jul 2019
DOIs
Publication statusPublished - 20 Oct 2019

Fingerprint

molecular clusters
glycine
Glycine
Amino acids
aqueous solutions
Dimers
monomers
Monomers
dimers
Nuclear magnetic resonance
nuclear magnetic resonance
radii
Water
water

Keywords

  • clustering
  • mesostructed liquid phase
  • glycine
  • scattering

Cite this

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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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Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions. / Zimbitas, Georgina; Jawor-Baczynska, Anna; Vesga, Maria Jazmin; Javid, Nadeem; Moore, Barry D.; Parkinson, John; Sefcik, Jan.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 579, 123633, 20.10.2019.

Research output: Contribution to journalArticle

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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

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