Conformation studies of aerosol-OT in reverse micelles using phase sensitive double quantum COSY NMR spectroscopy

1995 ◽  
Vol 96 (1-2) ◽  
pp. 165-169 ◽  
Author(s):  
Manoj Varshney ◽  
Amarnath Maitra
Keyword(s):  
Nmr Spectroscopy ◽  
Reverse Micelles ◽  
Double Quantum ◽  
Aerosol Ot ◽  
Phase Sensitive ◽  
Cosy Nmr

Small-Angle X-Ray Scattering and Near-Infrared Vibrational Spectroscopy of Water Confined in Aerosol-OT Reverse Micelles

ChemPhysChem ◽  
2008 ◽  
Vol 9 (18) ◽  
pp. 2794-2801 ◽  
Author(s):  
Sangeetha Balakrishnan ◽  
Nadeem Javid ◽  
Hermann Weingärtner ◽  
Roland Winter
Keyword(s):  
Vibrational Spectroscopy ◽  
Small Angle ◽  
Reverse Micelles ◽  
Near Infrared ◽  
X Ray ◽  
Aerosol Ot ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Probing Molecular Motion by Double-Quantum (13C,13C) Solid-State NMR Spectroscopy: Application to Ubiquitin

2010 ◽  
Vol 132 (1) ◽  
pp. 223-233 ◽  
Author(s):  
Robert Schneider ◽  
Karsten Seidel ◽  
Manuel Etzkorn ◽  
Adam Lange ◽  
Stefan Becker ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Molecular Motion ◽  
Double Quantum ◽  
Solid State Nmr Spectroscopy

scholarly journals Formose reaction accelerated in aerosol-OT reverse micelles

2016 ◽  
Vol 12 ◽  
pp. 2663-2667 ◽  
Author(s):  
Makoto Masaoka ◽  
Tomohiro Michitaka ◽  
Akihito Hashidzume
Keyword(s):  
Reverse Micelles ◽  
Water Layer ◽  
Major Product ◽  
Hexadecyltrimethylammonium Bromide ◽  
Interfacial Water ◽  
Formose Reaction ◽  
Aerosol Ot ◽  
Aot Reverse Micelles ◽  
Triton X ◽  
C Nmr

The formose reaction in reverse micelles of aerosol-OT (AOT), triton X-100 (TX), and hexadecyltrimethylammonium bromide (CTAB) was investigated. Time–conversion data have indicated that the interfacial water layer of AOT reverse micelles is a medium that accelerates formation of glycolaldehyde in the formose reaction. The 13C NMR spectra for the products of the formose reaction using formaldehyde-13C as starting material are indicative of the formation of ethylene glycol as a major product.

Structural studies of digitoxin and related cardenolides by two-dimensional NMR

1990 ◽  
Vol 68 (2) ◽  
pp. 272-277 ◽  
Author(s):  
Torbjörn Drakenberg ◽  
Peter Brodelius ◽  
Deane D. McIntyre ◽  
Hans J Vogel
Keyword(s):  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Chair Conformation ◽  
Coupling Constants ◽  
Two Dimensional ◽  
Structural Studies ◽  
Solution Conformation ◽  
Phase Sensitive ◽  
Multiple Relay ◽  
C Nmr

The 1H and 13C NMR spectra of the cardenolides digitoxigenin, digoxigenin, digitoxin, and mono- and bis-digitoxigenin digitoxosides have been completely assigned by two-dimensional NMR spectroscopy. The techniques used include phase-sensitive COSY, multiple relay COSY, and carbon–proton correlation (HETCOR and HMQC) spectra. Various aspects of the solution conformation of the steroid moiety of digitoxin and digoxigenin could be determined from coupling constants and NOE difference experiments and they are indicative of an all-chair conformation. The carbohydrate rings in digitoxin and the mono- and bis-digitoxigenin digitoxosides are also in the chair conformation. Keywords: cardenolides, digitoxigenin, digitoxin, 2-dimensional NMR, conformational analysis.

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