Details
| Translated title of the contribution | THz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3-Lösungen |
|---|---|
| Original language | English |
| Pages (from-to) | 490-495 |
| Number of pages | 6 |
| Journal | Angewandte Chemie International Edition |
| Volume | 56 |
| Issue number | 2 |
| Early online date | 28 Dec 2016 |
| Publication status | Published - 3 Jan 2017 |
| Externally published | Yes |
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
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- Catalysis
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In: Angewandte Chemie International Edition, Vol. 56, No. 2, 03.01.2017, p. 490-495.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - THz-Spektroskopie erlaubt Rückschlüsse auf die Wasserdynamik und die Lage einer flüssig-flüssig-binodalen Grenze in wässrigen CaCO3 -Lösungen
AU - Sebastiani, Federico
AU - Wolf, Stefan L. P.
AU - Born, Benjamin
AU - Luong, Trung Quan
AU - Cölfen, Helmut
AU - Gebauer, Denis
AU - Havenith, Martina
N1 - Publisher Copyright: © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/1/3
Y1 - 2017/1/3
N2 - 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.
AB - 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.
KW - calcium carbonate
KW - phase diagrams
KW - pre-nucleation clusters
KW - THz spectroscopy
KW - water chemistry
UR - http://www.scopus.com/inward/record.url?scp=85007594005&partnerID=8YFLogxK
U2 - 10.1002/ange.201610554
DO - 10.1002/ange.201610554
M3 - Article
VL - 56
SP - 490
EP - 495
JO - Angewandte Chemie International Edition
JF - Angewandte Chemie International Edition
SN - 1521-3757
IS - 2
ER -