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Updated: Jul 15, 2026

NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
Published on: November 1, 2024
Investigations of polymer dynamics in nanoporous media by field cycling NMR relaxometry and the dipolar correlation
Ravinath Kausik1, Nail Fatkullin, Nicola Hüsing
1Sektion Kernresonanzspektroskopie, Universität Ulm, 89069 Ulm, Germany. ravinath.kausik@uni-ulm.de
Abstract:
The chain dynamics of short-chain perfluoropolyether melts confined in Vycor nanoporous media has been characterized by field cycling nuclear magnetic resonance relaxometry and the dipolar correlation effect. The slowdown of motions under confinement, leading to larger residual dipolar couplings, has been probed by looking at the quotient of stimulated and primary echoes. Using field cycling relaxometry, it has been shown that there is strong evidence of reptation-like motion, even for such short-chain polymers as shown by the frequency and molecular weight dependences of the spin-lattice relaxation time.
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