High-Field Nuclear Magnetic Resonance Observation of Gas Shale Fracturing by Methane Gas

2014 ◽  
Vol 28 (6) ◽  
pp. 3638-3644 ◽  
Author(s):  
Hai-Jing Wang ◽  
Albina Mutina ◽  
Ravinath Kausik
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Field ◽  
Gas Shale ◽  
Methane Gas ◽  
Gas Shale Fracturing ◽  
Nuclear Magnetic

High-Field Nuclear Magnetic Resonance with a Newly Designed Hybrid Magnet System

2009 ◽  
Vol 48 (1) ◽  
pp. 010220 ◽  
Author(s):  
Kenjiro Hashi ◽  
Tadashi Shimizu ◽  
Teruaki Fujito ◽  
Atsushi Goto ◽  
Shinobu Ohki ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Field ◽  
Hybrid Magnet ◽  
Magnet System ◽  
Nuclear Magnetic

Polymyrcene microstructure revisited from precise high-field nuclear magnetic resonance analysis

Polymer ◽  
2014 ◽  
Vol 55 (16) ◽  
pp. 3869-3878 ◽  
Author(s):  
Sébastien Georges ◽  
Marc Bria ◽  
Philippe Zinck ◽  
Marc Visseaux
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Field ◽  
Nuclear Magnetic Resonance Analysis ◽  
Resonance Analysis ◽  
Nuclear Magnetic

Recent Contributions of Nuclear Magnetic Resonance in Organocatalysis Mechanism Elucidation

2019 ◽  
Vol 7 (1) ◽  
pp. 7-22
Author(s):  
Gustavo Senra Gonçalves De Carvalho ◽  
Álisson Silva Granato ◽  
Pedro Pôssa De Castro ◽  
Giovanni Wilson Amarante
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Reaction Mechanisms ◽  
Solid State Nmr ◽  
High Field ◽  
Isotopic Effect ◽  
Reaction Monitoring ◽  
Real Time Identification ◽  
Non Destructive ◽  
Nuclear Magnetic

Background: Nuclear Magnetic Resonance (NMR) is one of the most employed techniques in structural elucidation of organic compounds. In addition to its use in structural characterization, it has been widely employed in the investigation of reaction mechanisms, especially those involving catalysis. Objective: In this review, we aim to provide recent examples of the interface of NMR and organocatalysis reaction mechanism. Methods: Selected examples of different approaches for mechanism elucidation will be presented, such as isotopic effect, catalyst labelling and online reaction monitoring. A discussion involving the use of solid-state NMR will also be disclosed. Conclusion: NMR consists of a non-destructive technique, extremely useful in the real-time identification of intermediates in crude reaction mixtures. With the advent of two-dimensional experiments and high field NMR spectrometers, the reports of studies involving mechanistic elucidation were greatly enhanced. In this context, nowadays NMR appears as a powerful tool for the comprehension of reaction mechanisms, including the possibility of the proposal of unknown reaction mechanisms within organocatalysis.

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