Nuclear-magnetic-resonance and Fourier-transform infrared spectroscopic studies of the hydrogen—deuterium exchange of thiol groups: determination of the fractionation factor

1982 ◽  
Vol 10 (4) ◽  
pp. 232-233 ◽  
Author(s):  
RONALD J. SZAWELSKI ◽  
CHRISTOPHER W. WHARTON ◽  
SUSAN WHITE
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Fourier Transform Infrared ◽  
Spectroscopic Studies ◽  
Hydrogen Deuterium Exchange ◽  
Thiol Groups ◽  
Fractionation Factor ◽  
Hydrogen Deuterium

scholarly journals Fourier Transform Infrared Spectral Analysis of Polyisoprene of a Different Microstructure

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Dongmei Chen ◽  
Huafeng Shao ◽  
Wei Yao ◽  
Baochen Huang
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Spectral Analysis ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Detailed Analysis ◽  
Fourier Transform Infrared ◽  
Ftir Spectra ◽  
H Nmr ◽  
Infrared Spectral

Some polyisoprene samples of different microstructure contents were studied by Fourier transform infrared (FTIR) and1H Nuclear magnetic resonance (1H NMR). On the basis of detailed analysis of FTIR spectra of polyisoprene, the shift of absorption peaks caused by microstructure content’s variation was discussed. The contents of the polyisoprene samples’ microstructure which was determined by the1H NMR was used as the standard. Through the choice, calculation, and comparison with the corresponding absorption peaks of FTIR, a method based on the results of the analysis has been developed for the determination of the microstructure contents of polyisoprene by FTIR.

Formation Mechanism and its Pozzolanic Activity of Metakaolin

2014 ◽  
Vol 602-603 ◽  
pp. 620-623 ◽  
Author(s):  
Mei Rong Wang ◽  
Ning Guo ◽  
Pei Gang He ◽  
Jing Bo Yu ◽  
De Chang Jia
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Solid State ◽  
Magnetic Resonance ◽  
Formation Mechanism ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Pozzolanic Activity ◽  
Different Temperatures ◽  
Increasing Temperature

In this paper, the process of the transformation from kaolin to metakaolin was investigated. The kaolin was calcined at different temperatures and analyzed by Xray diffraction (XRD), Fourier transform infrared spectra (FTIR) and solid state nuclear magnetic resonance (NMR). The formation of metakaolin structure was based on the stacking polyhedrons changes, which originated from dehydroxylation of kaolinite. With increasing temperature, kaolin kept structure of kaolinite unchanged in the course of dehydroxylation and then structure of kaolinite transformed to metakaolin when the dehydroxylation was over. It was demonstrated that the essence of pozzolanic activity of metakaolin. The result revealed that the pozzolanic activity of metakaolin increased with increasing temperature at the range of 600~900 °C.

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