Field-cycling NMR relaxometry of viscous liquids and polymers
Field-cycling NMR relaxometry of viscous liquids and polymers
Publication year: 2011
Source: Progress in Nuclear Magnetic Resonance Spectroscopy, In Press, Accepted Manuscript, Available online 27 August 2011</br>
D., Kruk , A., Herrmann , E.A., Rössler</br>
Graphical abstract
*Graphical abstract:**Highlights:*? NMR relaxometry compared with DQ NMR, dielectric spectroscopy and light scattering ? Applying susceptibility representation and frequency-temperature superposition ? Liquids: Intra- & intermolecular relaxation give rotational & translational correlation times ? Polymers:...
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08-29-2011 06:41 AM
Naturally occurring biodegradable polymers as the basis of chiral gels for the distinction of enantiomers by partially oriented NMR spectroscopy.
Naturally occurring biodegradable polymers as the basis of chiral gels for the distinction of enantiomers by partially oriented NMR spectroscopy.
Naturally occurring biodegradable polymers as the basis of chiral gels for the distinction of enantiomers by partially oriented NMR spectroscopy.
Int J Artif Organs. 2011 Feb;34(2):134-8
Authors: Büchler SS, Kummerlöwe G, Luy B
In modern, high resolution NMR spectroscopy, anisotropic parameters play an important role. They can be measured with the help of liquid crystalline mesophases or stretched...
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07-14-2011 04:40 PM
[Question from NMRWiki Q&A forum] study of polymer degradation
study of polymer degradation
Hi, I was asked to study polyethylene degradated by gamma and Xrays. I planed to measure relaxations rates, but which one is the most relevant to highlight chain degradation? T1, T2, but on 1H or 13C? By reading some articles, I feel T2 is not very interesting, right? T1rho experiments seems to give good results, I have found 2 sequences in Bruker's library, T1rhoX (CP step then variable length spin lock pulse on 13C channel) and T1rhoH (CP step then variable length spin lock pulse on 1H channel), and there is also the more classical variable contact time...