KOPS - Das Institutionelle Repositorium der Universität Konstanz

Distinct Short-Range Order Is Inherent to Small Amorphous Calcium Carbonate Clusters (<2 nm)

Distinct Short-Range Order Is Inherent to Small Amorphous Calcium Carbonate Clusters (<2 nm)

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:395b9bfec4a1e8a0c302cbf687c40407

SUN, Shengtong, Daniel M. CHEVRIER, Peng ZHANG, Denis GEBAUER, Helmut CÖLFEN, 2016. <i>Distinct Short-Range Order Is Inherent to Small Amorphous Calcium Carbonate Clusters (<2 nm)</i>. In: Angewandte Chemie International Edition. <b>55</b>(40), pp. 12206-12209. ISSN 1433-7851. eISSN 1521-3773. Available under: doi: 10.1002/anie.201604179

@article{Sun2016Disti-35743, title={Distinct Short-Range Order Is Inherent to Small Amorphous Calcium Carbonate Clusters (<2 nm)}, year={2016}, doi={10.1002/anie.201604179}, number={40}, volume={55}, issn={1433-7851}, journal={Angewandte Chemie International Edition}, pages={12206--12209}, author={Sun, Shengtong and Chevrier, Daniel M. and Zhang, Peng and Gebauer, Denis and Cölfen, Helmut} }

2016-10-26T14:09:52Z Zhang, Peng eng Zhang, Peng Amorphous intermediate phases are vital precursors in the crystallization of many biogenic minerals. While inherent short-range orders have been found in amorphous calcium carbonates (ACCs) relating to different crystalline forms, it has never been clarified experimentally whether such orders already exist in very small clusters less than 2 nm in size. Here, we studied the stability and structure of 10,12-pentacosadiynoic acid (PCDA) protected ACC clusters with a core size of ca. 1.4 nm consisting of only seven CaCO<sub>3</sub> units. Ligand concentration and structure are shown to be key factors in stabilizing the ACC clusters. More importantly, even in such small CaCO<sub>3</sub> entities, a proto-calcite short-range order can be identified but with a relatively high degree of disorder that arises from the very small size of the CaCO<sub>3</sub> core. Our findings support the notion of a structural link between prenucleation clusters, amorphous intermediates, and final crystalline polymorphs, which appears central to the understanding of polymorph selection. Chevrier, Daniel M. Chevrier, Daniel M. Sun, Shengtong 2016 Cölfen, Helmut 2016-10-26T14:09:52Z Gebauer, Denis Sun, Shengtong Distinct Short-Range Order Is Inherent to Small Amorphous Calcium Carbonate Clusters (<2 nm) Gebauer, Denis Cölfen, Helmut

Dateiabrufe seit 26.10.2016 (Informationen über die Zugriffsstatistik)

Sun_0-369702.pdf 4

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto