TY - JOUR

T1 - Development and application of novel NMR methodologies for the in situ characterization of crystallization processes of metastable crystalline materials

AU - Van Wüllen, Leo

AU - Schiffmann, Jan Gerrit

AU - Kopp, Jakob

AU - Liu, Zhongqing

AU - Kirchhain, Holger

AU - Düvel, André

AU - Heitjans, Paul

N1 - Funding Information: We gratefully acknowledge funding by the Deutsche Forschungsgemeinschaft within the priority programme SPP 1415. Collaborations and fruitful discussions within numerous members of the priority programme, especially with T. Nilges and M. Wiebcke are also cordially acknowledged. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - In this contribution we report on the development and application of modern NMR approaches for the in situ characterization of the crystallization of metastable materials. The work was performed within the framework of the DFG priority programme SPP 1415 "Crystalline Non- Equilibrium Phases". As one of the goals of this project, the development of a NMR methodology which enables an analysis of local structural motifs on short (1-2 A) and extended (2-6 A) length scales without the need for fast magic angle spinning (MAS) has been defined, since the enormous centripetal forces which occur during fast sample rotation (up to 107 g) may intervene with the chemical or physical process which is being monitored. To achieve this goal, we developed a magic angle turning probe and pulse sequences allowing to trace the isotropic chemical shifts and heteronuclear dipolar couplings and hence the determination of structural motifs on short and intermediate length scales. With the implementation of novel inductive heating approaches the range of accessible rotation frequencies for in situ high temperature NMR measurements has been enlarged, now covering the ?MAS range of 0-10 kHz with an accessible temperature of up to 700 °C. Application of NMR methodologies for the characterization of crystallization processes and the structure and dynamics of novel phases, partially in joint collaborations within the priority program, are also reported.

AB - In this contribution we report on the development and application of modern NMR approaches for the in situ characterization of the crystallization of metastable materials. The work was performed within the framework of the DFG priority programme SPP 1415 "Crystalline Non- Equilibrium Phases". As one of the goals of this project, the development of a NMR methodology which enables an analysis of local structural motifs on short (1-2 A) and extended (2-6 A) length scales without the need for fast magic angle spinning (MAS) has been defined, since the enormous centripetal forces which occur during fast sample rotation (up to 107 g) may intervene with the chemical or physical process which is being monitored. To achieve this goal, we developed a magic angle turning probe and pulse sequences allowing to trace the isotropic chemical shifts and heteronuclear dipolar couplings and hence the determination of structural motifs on short and intermediate length scales. With the implementation of novel inductive heating approaches the range of accessible rotation frequencies for in situ high temperature NMR measurements has been enlarged, now covering the ?MAS range of 0-10 kHz with an accessible temperature of up to 700 °C. Application of NMR methodologies for the characterization of crystallization processes and the structure and dynamics of novel phases, partially in joint collaborations within the priority program, are also reported.

KW - Crystallization processes

KW - Ionic conductors

KW - Solid state NMR

UR - http://www.scopus.com/inward/record.url?scp=85011923701&partnerID=8YFLogxK

U2 - 10.1515/zkri-2016-1975

DO - 10.1515/zkri-2016-1975

M3 - Article

AN - SCOPUS:85011923701

VL - 232

SP - 141

EP - 159

JO - Zeitschrift fur Kristallographie - Crystalline Materials

JF - Zeitschrift fur Kristallographie - Crystalline Materials

SN - 2194-4946

IS - 1-3

ER -