Pulse Sequences to Observe NMR Coupled Relaxation in AXn Spin Systems

TL;DR

This paper introduces modified HSQC pulse sequences to observe coupled relaxation in various AXn spin systems, enabling detailed analysis of ${}^{13} extrm{C}$-coupled relaxation phenomena in NMR spectroscopy.

Contribution

It proposes new pulse sequences based on HSQC modifications for observing coupled relaxation in AX, AX$_2$, and AX$_3$ systems, expanding NMR analysis capabilities.

Findings

Pulse sequences can produce 1D and 2D proton NMR spectra.

Applicable to ${}^{13} extrm{CH}$ and ${}^{13}{ extrm{CH}}_2$ systems.

Facilitates observation of coupled relaxation in complex spin systems.

Abstract

NMR pulse sequences that are modifications of the HSQC experiment are proposed to observe ${}^{13}\textrm{C}$-coupled relaxation in AX, AX$_2$, and AX$_3$ spin systems. ${}^{13}\textrm{CH}$ and ${}^{13}{\textrm{CH}}_2$ moieties are discussed as exemplary AX and AX$_2$ spin systems. The pulse sequences may be used to produce 1D or 2D proton NMR spectra.