Orientationally Broadened NMR Spectra: Analysis by Special Processing Methods

ChemInform ◽  
2003 ◽  
Vol 34 (32) ◽  
Author(s):  
Frederick G. Vogt ◽  
Karl T. Mueller
Keyword(s):  
Nmr Spectra ◽  
Processing Methods ◽  
Spectra Analysis

Teaching NMR spectra analysis with nmr.cheminfo.org

2018 ◽  
Vol 56 (6) ◽  
pp. 529-534 ◽  
Author(s):  
Luc Patiny ◽  
Alejandro Bolaños ◽  
Andrés M. Castillo ◽  
Andrés Bernal ◽  
Julien Wist
Keyword(s):  
Nmr Spectra ◽  
Spectra Analysis

Analysis of 1H-NMR spectra of cinnamaldehyde type model substances of lignin

1980 ◽  
Vol 45 (2) ◽  
pp. 330-334 ◽  
Author(s):  
Tibor Liptaj ◽  
Milan Remko ◽  
Ján Polčin
Keyword(s):  
Double Bond ◽  
Nmr Spectra ◽  
Side Chain ◽  
Type Model ◽  
Stable Conformer ◽  
Spectra Analysis ◽  
H Nmr ◽  
Nmr Data ◽  
Lignin Model ◽  
Model Substances

1H-NMR spectra of the following lignin model substances have been analyzed: cinnamaldehyde, 2-methoxycinnamaldehyde, 3-methoxycinnamaldehyde, 4-methoxycinnamaldehyde, 3,4-dimethoxycinnamaldehyde, 3-methoxy-4-hydroxycinnamaldehyde and 3,4,5-trimethoxycinnamaldehyde. From the NMR spectra analysis it follows that the studied compounds exist in solutions as trans isomers. Theoretical (PCILO) calculations in agreement with the NMR data have shown that the more stable conformer has trans orientation of C=O group with respect to the double bond of the conjugated side chain.

Evaluation of Signal Processing Methods for the Quantification of Strongly Overlapping Peaks in 31P NMR Spectra

1994 ◽  
Vol 105 (1) ◽  
pp. 31-37 ◽  
Author(s):  
C. Decanniere ◽  
P. Vanhecke ◽  
F. Vanstapel ◽  
H. Chen ◽  
S. Vanhuffel ◽  
...  
Keyword(s):  
Signal Processing ◽  
Nmr Spectra ◽  
31P Nmr ◽  
Processing Methods ◽  
31P Nmr Spectra ◽  
Overlapping Peaks ◽  
Signal Processing Methods

scholarly journals High resolution-1Н NMR spectroscopy of oral liquid in young patients with wedge-shaped lesions

2021 ◽  
Vol 18 (4) ◽  
pp. 20-25
Author(s):  
A. V. Mitronin ◽  
E. A. Srebnaya ◽  
V. I. Privalov ◽  
A. A. Prokopov
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Young Patients ◽  
Treatment Method ◽  
Spectra Analysis ◽  
Oral Rinse ◽  
Before And After ◽  
Oral Liquid

Aim. The comparison of saliva 1Н NMR spectra in patients with wedge-shaped lesions before and after treatment.Materials and methods. Saliva as a study material was taken from patients with wedge-shaped lesions before and after treatment. The treatment method was remineralizing therapy that included the use of the oral rinse containing zinchydroxyapatite. 1Н NMR spectroscopy was chosen as an investigation method.Results. In most cases it is noted that after treatment the content of propionic and butyric acids was on the rise in relation of acetic acid. Overall concentration of 1Н protons didn't change significantly.Conclusions. 1Н NMR spectra analysis shows organic acid distribution in oral liquid before and after treatment, which helps to evaluate its response.

scholarly journals Solid State 13C NMR Spectra Analysis of Alkalicellulose

1991 ◽  
Vol 23 (8) ◽  
pp. 1009-1014 ◽  
Author(s):  
Masae Takahashi ◽  
Masako Ookubo ◽  
Haruko Takenaka
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Nmr Spectra ◽  
13C Nmr Spectra ◽  
Spectra Analysis ◽  
Solid State 13C Nmr

Synthesis of Bis-(Tributyl citrate acid)esters as Novel Green Plasticizers

2012 ◽  
Vol 557-559 ◽  
pp. 1089-1094
Author(s):  
Ge Meng ◽  
Tao Yang ◽  
Jian Hua Shi ◽  
A Qun Zheng ◽  
Yang Liu ◽  
...  
Keyword(s):  
Weight Loss ◽  
Soybean Oil ◽  
Nmr Spectra ◽  
Environmentally Friendly ◽  
Spectra Analysis ◽  
Weight Loss Percentage ◽  
High Yields ◽  
New Compounds ◽  
Acid Esters

Citrate esters were used as plasticizers in many kinds of plastic resins. Several compounds with new structure of bis-(tribytyl citrate acid) esters have been synthesized via an environmentally friendly way with relatively high yields. The structure of each compound has been verified by MS and NMR spectra analysis. The properties of these plasticizers have been evaluated by weight loss percentage in soybean oil. The various parameters have been calculated to correlate with their properties. The result showed that weight loss percentages are associated with steric parameters. It was also found that some of the new compounds showed better weight loss ability than traditional plasticizers.

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