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Updated: Apr 20, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Second-order quadrupole interaction based detection of ultra-slow motions: Tensor operator framework for
Mischa Adjei-Acheamfour1, Roland Böhmer1
1Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany.
Abstract:
The second-order quadrupolar broadening of the central transition of nuclear probes with half-integer spins I is demonstrated to be useful to detect ultraslow molecular motions. On the basis of density matrix calculations explicit expressions are derived for quadrupolarly modulated sin-sin and cos-cos signals of selectively excited nuclei with I=3/2, 5/2, 7/2, and 9/2. These correlation functions are suitable for implementation in two-dimensional exchange spectroscopy as well as for stimulated-echo experiments. As an application, 17O measurements of the reorientational correlation function of water molecules in hexagonal ice are presented.
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