THz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3 -Lösungen

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Federico Sebastiani
  • Stefan L. P. Wolf
  • Benjamin Born
  • Trung Quan Luong
  • Helmut Cölfen
  • Denis Gebauer
  • Martina Havenith

External Research Organisations

  • Ruhr-Universität Bochum
  • University of Konstanz
  • Weizmann Institute of Science
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Details

Translated title of the contributionTHz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3-Lösungen
Original languageEnglish
Pages (from-to)490-495
Number of pages6
JournalAngewandte Chemie International Edition
Volume56
Issue number2
Early online date28 Dec 2016
Publication statusPublished - 3 Jan 2017
Externally publishedYes

Abstract

Many phenomena depend on CaCO 3nucleation where the role of water remains enigmatic. Changes in THz absorption during the early stages of CaCO 3nucleation evidence altered coupled motions of hydrated calcium and carbonate ions. The direct link between these changes and the continuous development of the ion activity product reveals the locus of a liquid–liquid binodal limit. The data strongly suggest that proto-structured amorphous CaCO 3forms through solidification of initially liquid precursors. Furthermore, polycarboxylates, which stabilize liquid precursors of CaCO 3, significantly enhance the kinetic stability of the metastable liquid–liquid state, but they do not affect the locus of the binodal limit. The importance of water network dynamics in phase separation mechanisms can be understood based on the notions of the pre-nucleation cluster pathway, and is likely to be more general for aqueous systems.

Keywords

    calcium carbonate, phase diagrams, pre-nucleation clusters, THz spectroscopy, water chemistry

ASJC Scopus subject areas

Cite this

THz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3 -Lösungen. / Sebastiani, Federico; Wolf, Stefan L. P.; Born, Benjamin et al.
In: Angewandte Chemie International Edition, Vol. 56, No. 2, 03.01.2017, p. 490-495.

Research output: Contribution to journalArticleResearchpeer review

Sebastiani F, Wolf SLP, Born B, Luong TQ, Cölfen H, Gebauer D et al. THz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3 -Lösungen. Angewandte Chemie International Edition. 2017 Jan 3;56(2):490-495. Epub 2016 Dec 28. doi: 10.1002/ange.201610554, 10.1002/anie.201610554
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AU - Wolf, Stefan L. P.

AU - Born, Benjamin

AU - Luong, Trung Quan

AU - Cölfen, Helmut

AU - Gebauer, Denis

AU - Havenith, Martina

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