Direct estimation of an element of order matrix from 1H NMR spectra of strongly dipolar coupled spins

✍ Scribed by G. N. Manjunatha Reddy; N. Suryaprakash

• Book ID: 102530570
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 188 KB
• Volume: 47
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.2428

✦ Synopsis

Abstract

NMR spectra of molecules oriented in thermotropic liquid crystalline media provide information on the molecular structure and order. The spins are generally strongly dipolar coupled and the spectral analyses require the tedious and time consuming numerical iterative calculations. The present study demonstrates the application of multiple quantum spin state selective detection of single quantum transitions for mimicking the homonuclear decoupling and the direct estimation of an element of ordering matrix. This information is utilized to estimate the nearly accurate starting dipolar couplings for iterative calculations. The studies on the spectra of strongly dipolar coupled five and six interacting spin systems are reported. Copyright © 2009 John Wiley & Sons, Ltd.