Modified z-gradient filtering as a mean to obtain phased deuterium autocorrelation 2D NMR spectra in oriented solvents.
We describe a modified z-gradient filter scheme specifically designed to obtain pure absorption mode deuterium 2D NMR spectra recorded in oriented solvents. The proposed technique is investigated by analysing the evolution of the density operator for a spin I=1. The method is applied to the recently designed Q-COSY and Q-resolved 2D experiments to simplify the analysis of chiral molecules dissolved in weakly orienting chiral liquid crystals. The efficiency of this z-gradient filtering technique is illustrated using the perdeuterated 1-butanol, a prochiral molecule of average Cs symmetry, dissolved in an organic solution of poly-gamma-benzyl-L-glutamate (PBLG). The experimental results as well as the advantages of the new experiments compared with the previous ones are described and discussed.
Lafon
Olivier
O
Laboratoire de Chimie Structurale Organique, CNRS UMR 8074, ICMMO, Université de Paris-Sud, Bât. 410, 91405 Orsay, France.
Lesot
Philippe
P
Merlet
Denis
D
Courtieu
Jacques
J
D003903:Deuterium; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D011099:Polyglutamic Acid / Q000031:analogs & derivatives* / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry
D012997:Solvents; C003172:poly-gamma-benzyl-L-glutamate; D011099:Polyglutamic Acid; D003903:Deuterium