Low-field 1H-NMR spectroscopy for compositional analysis of multicomponent polymer systems

The Analyst ◽  
2019 ◽  
Vol 144 (5) ◽  
pp. 1679-1686 ◽  
Author(s):  
Sneha B. Chakrapani ◽  
Michael J. Minkler ◽  
Bryan S. Beckingham
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Compositional Analysis ◽  
Polymer Systems ◽  
H Nmr ◽  
Low Field ◽  
Multicomponent Polymer

A low-field, 60 MHz, 1H NMR spectrometer yields quantitatively comparable results to 400 MHz spectrometers for the compositional analysis of multicomponent polymer systems.

Conformational study on ribonucleoside O-phosphonylmethyl derivatives by 1H NMR spectroscopy

1985 ◽  
Vol 50 (8) ◽  
pp. 1899-1905 ◽  
Author(s):  
Milena Masojídková ◽  
Jaroslav Zajíček ◽  
Miloš Buděšínský ◽  
Ivan Rosenberg ◽  
Antonín Holý
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Conformational Study ◽  
H Nmr ◽  
Conformational Properties

Conformational properties of ribonucleoside 5'-O-phosphonylmethyl derivatives have been determined by 1H NMR spectroscopy and compared with those of natural nucleosides and 5'-nucleotides.

scholarly journals Assessment of 1H NMR Spectroscopy for Specific Metabolite Fingerprinting of Angelica sinensis

2008 ◽  
Vol 3 (5) ◽  
pp. 1934578X0800300
Author(s):  
Dongmin Su ◽  
Jinglan Han ◽  
Shishan Yu ◽  
Hailin Qin
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Authentic Sample ◽  
Angelica Sinensis ◽  
Metabolite Fingerprinting ◽  
H Nmr ◽  
Pure Compounds ◽  
Polar Extracts

The 1H NMR fingerprints of fractionated non-polar extracts (CSPD A) from the roots of Angelica sinensis of six different specimens were assigned by comparison with the 1H NMR spectra of the isolated pure compounds. The 1H NMR fingerprints showed exclusively characteristic resonance signals of the major constituents of the plant. The 1H NMR fingerprint established for an authentic sample of A. sinensis can be used for authenticating A. sinensis species.

Light induced E–Z isomerization in a multi-responsive organogel: elucidation from 1H NMR spectroscopy

2015 ◽  
Vol 51 (53) ◽  
pp. 10680-10683 ◽  
Author(s):  
Sanjoy Mondal ◽  
Priyadarshi Chakraborty ◽  
Partha Bairi ◽  
Dhruba P. Chatterjee ◽  
Arun K. Nandi
Keyword(s):  
Mechanical Properties ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Nmr Spectra ◽  
H Nmr ◽  
Imine Bond

Light induced E–Z isomerization along imine bond in a multiresponsive organogel of anthracene attached 3,4,5-tris(dodecyloxy)benzohydrazide gelator altering morphology, fluorescence and mechanical properties is elucidated from 1H NMR spectra.

Mobile Low-Field 1H NMR Spectroscopy Desktop Analysis of Biodiesel Production

2012 ◽  
Vol 44 (1-2) ◽  
pp. 41-53 ◽  
Author(s):  
Yamila Garro Linck ◽  
M. H. M. Killner ◽  
E. Danieli ◽  
B. Blümich
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Biodiesel Production ◽  
Low Field

Conformation studies of isomeric 1-acyloxy-2-(4-methoxybenzyl)-cyclohexanes by 1H NMR spectroscopy

1982 ◽  
Vol 47 (10) ◽  
pp. 2763-2767 ◽  
Author(s):  
Miloš Buděšínský ◽  
David Šaman ◽  
Zdeněk Wimmer
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Chair Conformation ◽  
Acetoxy Group ◽  
Cyclohexane Ring ◽  
H Nmr

The conformation of the cyclohexane ring and the p-methoxybenzyl substituent in the series of isomeric 1-acyloxy-2-(4-methoxybenzyl)cyclohexanes was studied by means of 1H NMR spectroscopy. In all the substances investigated the cyclohexane ring assumes chair conformation. trans-Isomers have both substituents in equatorial positions, while in cis-isomers the p-methoxybenzyl group is always equatorial and the hydroxy or acetoxy group axial.

scholarly journals (—)D-und (+)D-4-Methoxyphenylmethyl- thiophosphinsäure, Überprüfung der Racematspaltung mittels 31P{ 1H}-NMR-Spektroskopie/(—)D-and (+ )D-4-Methoxyphenylmethyl- thiophosphinic Acid, Control of the Resolution by 31P{1H} NMR Spectroscopy

1979 ◽  
Vol 34 (9) ◽  
pp. 1332-1333 ◽  
Author(s):  
Wilhelm Kuchen ◽  
Jurgen Kutter
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Fractional Crystallization ◽  
1H Nmr Spectroscopy ◽  
Optical Purity ◽  
Separation Process ◽  
H Nmr ◽  
Acid Control

Abstract (-)D-and (+)D-4-methoxyphenylmethyl-thiophosphinic acid, quinine salts of (-)D-and (+)D-4-methoxyphenylmethylthiophosphinic acid, checking of resolution by 31P{ 1H} NMR-spectroscopy (-)D-and(+)D-4-CH3OC6H4(CH3)P(S)OH acid were obtained from fractional crystallization of the quinine salt of the racemic acid. 31P{1H} NMR spectroscopy proved to be very useful in checking the separation process as well as the optical purity of the diastereomers and enan­tiomers.

scholarly journals Discrimination of enantiomers of dipeptide derivatives with two chiral centers by tetraaza macrocyclic chiral solvating agents using 1H NMR spectroscopy

2016 ◽  
Vol 3 (12) ◽  
pp. 1716-1724 ◽  
Author(s):  
Lixia Fang ◽  
Caixia Lv ◽  
Guo Wang ◽  
Lei Feng ◽  
Pericles Stavropoulos ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
H Nmr ◽  
New Class ◽  
Chiral Centers

Enantiomers of dipeptide derivatives with two chiral centers were effectively discriminated by a new class of tetraaza macrocyclic chiral solvating agents via1H NMR spectroscopy.

Application of low-field and medium-resolution 1H NMR spectroscopy combined with chemometric methods for automotive gasoline quality control

Fuel ◽  
2020 ◽  
Vol 282 ◽  
pp. 118684
Author(s):  
Leticia Magalhães de Aguiar ◽  
Evandro Bona ◽  
Luiz Alberto Colnago ◽  
Jarbas J. Rodrigues Rohwedder ◽  
Mario Henrique M. Killner
Keyword(s):  
Quality Control ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Automotive Gasoline ◽  
Chemometric Methods ◽  
Low Field ◽  
Medium Resolution

scholarly journals Chiral mono- and dicarbamates derived from ethyl (S)-lactate: convenient chiral solvating agents for the direct and efficient enantiodiscrimination of amino acid derivatives by 1H NMR spectroscopy

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 4869-4875 ◽  
Author(s):  
Federica Balzano ◽  
Gloria Uccello-Barretta
Keyword(s):  
Amino Acid ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Amino Acid Derivatives ◽  
H Nmr

New lactate-based CSAs for 1H NMR enantiodifferentiation of amino acid derivatives.

Conformational study of blocked pentofuranoses and their 1,5-anhydro derivatives by 1H NMR spectroscopy

1984 ◽  
Vol 49 (1) ◽  
pp. 235-243
Author(s):  
Jaroslav Zajíček ◽  
Miloš Buděšínský ◽  
Jiří Farkaš
Keyword(s):  
Spectral Analysis ◽  
Nmr Spectroscopy ◽  
Quantum Chemical Calculations ◽  
1H Nmr ◽  
Quantum Chemical ◽  
1H Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Conformational Study ◽  
H Nmr

Preferred conformations of the furanose ring and conformer population about the C(5)-C(4) bond in a series of benzoylated pentofuranosyl cyanides have been determined from their 1H NMR spectra. For the 1,5-anhydropentofuranose derivatives the results of the 1H NMR spectral analysis have been compared with the quantum chemical calculations.

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