Mesh size analysis of cellulose nanofibril hydrogels using solute exclusion and PFG-NMR spectroscopy

Soft Matter ◽  
2015 ◽  
Vol 11 (47) ◽  
pp. 9201-9210 ◽  
Author(s):  
Leila Jowkarderis ◽  
Theo G. M. van de Ven
Keyword(s):  
Nmr Spectroscopy ◽  
Mesh Size ◽  
Translational Diffusion ◽  
Size Analysis ◽  
Cellulose Nanofibril ◽  
Echo Intensity ◽  
Solute Exclusion ◽  
Pfg Nmr ◽  
Gel Network

The decay of the NMR echo intensity due to translational diffusion in the heterogeneous gel network is biexponential.

Analysis of the mesh size in a supramolecular hydrogel by PFG-NMR spectroscopy

Soft Matter ◽  
2013 ◽  
Vol 9 (22) ◽  
pp. 5483 ◽  
Author(s):  
Matthew Wallace ◽  
Dave J. Adams ◽  
Jonathan A. Iggo
Keyword(s):  
Nmr Spectroscopy ◽  
Mesh Size ◽  
Supramolecular Hydrogel ◽  
Pfg Nmr

scholarly journals Measuring translational diffusion coefficients of peptides and proteins by PFG-NMR using band-selective RF pulses

2014 ◽  
Vol 43 (6-7) ◽  
pp. 331-339 ◽  
Author(s):  
Shenggen Yao ◽  
Daniel K. Weber ◽  
Frances Separovic ◽  
David W. Keizer
Keyword(s):  
Diffusion Coefficients ◽  
Translational Diffusion ◽  
Rf Pulses ◽  
Pfg Nmr

scholarly journals Ion Transport Properties and Ionicity of 1,3-Dimethyl-1,2,3-Triazolium Salts with Fluorinated Anions

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1723 ◽  
Author(s):  
Martin Pulst ◽  
Yury Golitsyn ◽  
Detlef Reichert ◽  
Jörg Kressler
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Diffusion Coefficients ◽  
Important Class ◽  
Spectroscopy Data ◽  
Ion Conductivities ◽  
Electrochemical Devices ◽  
Pfg Nmr ◽  
Conductive Properties ◽  
Triazolium Salts

1,2,3-Triazolium salts are an important class of materials with a plethora of sophisticated applications. A series of three novel 1,3-dimethyl-1,2,3-triazolium salts with fluorine, containing anions of various size, is synthesized by methylation of 1,2,3-triazole. Their ion conductivity is measured by impedance spectroscopy, and the corresponding ionicities are determined by diffusion coefficients obtained from 1H and 19F pulsed field gradient nuclear magnetic resonance (PFG NMR) spectroscopy data, revealing that the anion strongly influences their ion conductive properties. Since the molar ion conductivities and ionicities of the 1,3-dimethyl-1,2,3-triazolium salts are enhanced in comparison to other 1,2,3-triazolium salts with longer alkyl substituents, they are promising candidates for applications as electrolytes in electrochemical devices.

Predicting the release profile of small molecules from within the ordered nanostructured lipidic bicontinuous cubic phase using translational diffusion coefficients determined by PFG-NMR

Nanoscale ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 2471-2478 ◽  
Author(s):  
Thomas G. Meikle ◽  
Shenggen Yao ◽  
Alexandru Zabara ◽  
Charlotte E. Conn ◽  
Calum J. Drummond ◽  
...  
Keyword(s):  
Small Molecules ◽  
Diffusion Coefficients ◽  
Translational Diffusion ◽  
Release Profile ◽  
Cubic Phase ◽  
Bicontinuous Cubic ◽  
Pfg Nmr

The Effect of Shape and Concentration on Translational Diffusion of Proteins Measured by PFG NMR

2017 ◽  
Vol 49 (1) ◽  
pp. 35-51 ◽  
Author(s):  
A. M. Kusova ◽  
A. E. Sitnitsky ◽  
B. Z. Idiyatullin ◽  
D. R. Bakirova ◽  
Yu. F. Zuev
Keyword(s):  
Translational Diffusion ◽  
Pfg Nmr

Quantification of Chlorogenic Acid and Hyperoside Directly from Crude Blueberry (Vaccinium angustifolium) Leaf Extract by NMR Spectroscopy Analysis: Single-Laboratory Validation

2012 ◽  
Vol 95 (5) ◽  
pp. 1406-1411 ◽  
Author(s):  
Joshua M Hicks ◽  
Asim Muhammad ◽  
Jonathan Ferrier ◽  
Ammar Saleem ◽  
Alain Cuerrier ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chlorogenic Acid ◽  
Mesh Size ◽  
Array Detector ◽  
Spectroscopy Analysis ◽  
Vaccinium Angustifolium ◽  
Spectroscopy Experiment ◽  
Tube Type ◽  
Significant Interference ◽  
Single Laboratory

Abstract A single-laboratory-validated NMR spectroscopy method was established for determining the quantity of chlorogenic acid and hyperoside from crude extract material of blueberry leaves of the species Vaccinium angustifolium var. laevifolium House. The calibration curve of chlorogenic acid showed a highly linear regression, R = 0.99998. NMR spectroscopy identification and quantification of the constituents directly from the mixture, within the error of HPLC-diode array detector analysis, were determined as 7.53 mM chlorogenic acid (64.0 mg chlorogenic acid/g powdered leaf) and 0.77 mM hyperoside (8.58 mg hyperoside/g powdered leaf). The LOD was calculated to be 0.01 mM and the LOQ 0.01 mM by the 9 min and 13 s NMR spectroscopy experiment utilized. The assay showed no significant interference from different field strengths, extraction mesh size, gravimetric scale precision, NMR spectroscopy tube type, pulse program, amount of starting dry material, or day-to-day operation. The robustness of NMR spectroscopy as a means of definitively monitoring chlorogenic acid and hyperoside content directly from crude extracts was demonstrated by Youden statistical analysis.

Probing the mobility of ibuprofen confined in MCM-41 materials using MAS-PFG NMR and hyperpolarised-129Xe NMR spectroscopy

2013 ◽  
Vol 15 (43) ◽  
pp. 18805 ◽  
Author(s):  
Flavien Guenneau ◽  
Kuldeep Panesar ◽  
Andrei Nossov ◽  
Marie-Anne Springuel-Huet ◽  
Thierry Azaïs ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
129Xe Nmr ◽  
Pfg Nmr ◽  
Mcm 41

scholarly journals Unravelling cationic cellulose nanofibril hydrogel structure: NMR spectroscopy and small angle neutron scattering analyses

Soft Matter ◽  
2018 ◽  
Vol 14 (2) ◽  
pp. 255-263 ◽  
Author(s):  
James C. Courtenay ◽  
Susana M. Ramalhete ◽  
William J. Skuze ◽  
Rhea Soni ◽  
Yaroslav Z. Khimyak ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Nmr Spectroscopy ◽  
Chemical Modification ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Cellulose Nanofibril ◽  
H Nmr

The structure of cationic cellulose nanofibril gels and changes in the nanoparticle form with varying chemical modification are revealed by neutron scattering, rheological and 1H NMR T1 relaxation time analyses.

scholarly journals Molecular dynamics involving proton exchange of a protic ionic liquid–water mixture studied by NMR spectroscopy

2019 ◽  
Vol 21 (39) ◽  
pp. 22014-22021 ◽  
Author(s):  
Mohammad Hasani ◽  
Lars Nordstierna ◽  
Anna Martinelli
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquid ◽  
Nmr Spectroscopy ◽  
Liquid Water ◽  
Translational Diffusion ◽  
Proton Exchange ◽  
Water Mixture ◽  
Protic Ionic Liquid ◽  
Proton Conducting ◽  
Proton Dynamics

Detailed characterisation of proton dynamics in proton conducting electrolytes is crucial in the design of improved ones. We focus on proton exchange and its effect on the proton's translational diffusion in search for desirable anomalies.

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