A Technique for In Situ Monitoring of Crystallization from Solution by Solid-State13C CPMAS NMR Spectroscopy

2008 ◽  
Vol 112 (30) ◽  
pp. 6808-6810 ◽  
Author(s):  
Colan E. Hughes ◽  
Kenneth D. M. Harris
Keyword(s):  
Nmr Spectroscopy ◽  
In Situ Monitoring ◽  
Crystallization From Solution

Simultaneous In Situ Monitoring of Trimethoxysilane Hydrolysis Reactions Using Raman, Infrared, and Nuclear Magnetic Resonance (NMR) Spectroscopy Aided by Chemometrics and Ab Initio Calculations

2018 ◽  
Vol 72 (9) ◽  
pp. 1404-1415
Author(s):  
Xiaoyun Chen ◽  
Donald Eldred ◽  
Jing Liu ◽  
Hsu Chiang ◽  
Xianghuai Wang ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Reaction Rates ◽  
In Situ Monitoring ◽  
Spectroscopic Techniques ◽  
Wide Range ◽  
Nuclear Magnetic ◽  
Hydrolysis Reactions

Sol-gels are found in many different scientific fields and have very broad applications. They are often prepared by the hydrolysis and condensation of alkoxysilanes such as trimethoxysilanes, which are commonly used as precursors in the preparation of silsequioxanes via the sol-gel process. The reaction rates of such reactions are influenced by a wide range of experimental factors such as temperature, pH, catalyst, etc. In this study, we combined multiple in situ spectroscopic techniques to monitor the hydrolysis and partial condensation reactions of methyltrimethoxysilane and phenyltrimethoxysilane. A rich set of kinetics information on intermediate species of the hydrolysis reactions were obtained and used for kinetics modeling. Raman and nuclear magnetic resonance (NMR) spectroscopy provided the most information about hydrolysis and NMR provided the most information about condensation. A quantitative method based on Raman spectra to quantify the various transient intermediate hydrolysis products was developed using NMR as the primary method, which can be deployed in the field where it is impractical to carry out NMR measurements.

scholarly journals In Situ Monitoring of Unique Switching Transitions in the Pressure-Amplifying Flexible Framework Material DUT-49 by High-Pressure 129Xe NMR Spectroscopy

2017 ◽  
Vol 121 (9) ◽  
pp. 5195-5200 ◽  
Author(s):  
Jana Schaber ◽  
Simon Krause ◽  
Silvia Paasch ◽  
Irena Senkovska ◽  
Volodymyr Bon ◽  
...  
Keyword(s):  
High Pressure ◽  
Nmr Spectroscopy ◽  
In Situ Monitoring ◽  
129Xe Nmr ◽  
Flexible Framework

scholarly journals Versatile, Robust, and Facile Approach for in Situ Monitoring Electrocatalytic Processes through Liquid Electrochemical NMR Spectroscopy

2019 ◽  
Vol 91 (3) ◽  
pp. 1686-1691 ◽  
Author(s):  
Shuo-Hui Cao ◽  
Shuo Liu ◽  
Hui-Jun Sun ◽  
Long Huang ◽  
Zu-Rong Ni ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
In Situ Monitoring

scholarly journals In Situ Monitoring of Heterogeneous Catalytic Hydrogenation via 129Xe NMR Spectroscopy and Proton MRI

ACS Catalysis ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 1417-1422 ◽  
Author(s):  
Dudari B. Burueva ◽  
Ekaterina V. Pokochueva ◽  
Xinpei Wang ◽  
Max Filkins ◽  
Alexandra Svyatova ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Catalytic Hydrogenation ◽  
In Situ Monitoring ◽  
129Xe Nmr ◽  
Heterogeneous Catalytic ◽  
Proton Mri ◽  
Heterogeneous Catalytic Hydrogenation
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