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Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

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Published on: July 4, 2016

Spin diffusion in multiple pulse spin-locking in solids containing paramagnetic impurities.

G B Furman¹, S D Goren, A M Panich

¹Department of Physics, Ben-Gurion University, Be'er-Sheva, Israel. gregoryf@bgu.ac.il

Solid State Nuclear Magnetic Resonance

|December 15, 2010

Summary

This summary is machine-generated.

This study investigates spin diffusion and relaxation in solids with paramagnetic impurities using multiple-pulse sequences. We determined key parameters like spin diffusion coefficient and correlation time for molecular motion.

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Area of Science:

Solid-state physics
Magnetic resonance spectroscopy

Background:

Paramagnetic impurities influence spin dynamics in solids.
Multiple-pulse spin-locking radio-frequency sequences probe spin behavior.

Purpose of the Study:

To theoretically and experimentally study spin diffusion and spin-lattice relaxation.
To determine the time-dependent magnetization using a derived diffusion equation.
To calculate spin-lattice relaxation time based on correlation time and pulse parameters.

Main Methods:

Theoretical analysis of spin diffusion and relaxation.
Experimental application of multiple-pulse spin-locking sequences.
Determination of diffusion equation for time-dependent magnetization.

Main Results:

A diffusion equation was derived, aiding in magnetization determination.
Spin-lattice relaxation time was calculated as a function of correlation time and pulse parameters.
Experimental data yielded spin diffusion coefficient (D), spin diffusion barrier radius (r(c)), and correlation time (τ(c)) for (C(2)F)(n).

Conclusions:

The study provides insights into spin dynamics in solids with paramagnetic impurities.
Estimated parameters (D∼7.1×10(-12)cm(2)/s, r(c)∼4.8×10(-10)m, τ(c)∼10.2μs) characterize molecular motion in polycrystalline (C(2)F)(n).