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Kuiper S, Norder B, Jager WF, Dingemans TJ, van Turnhout J, Picken SJ. Elucidation of the Orientational Order and the Phase Diagram of p-Quinquephenyl. J Phys Chem B 2011; 115:1416-21. [DOI: 10.1021/jp105643s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefan Kuiper
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Ben Norder
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Wolter F. Jager
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Theo J. Dingemans
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Jan van Turnhout
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Stephen J. Picken
- Nanostructured Materials, Chemical Engineering, and ‡NanoOrganic Chemistry, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
- Chemistry and Aerospace Engineering, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
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Nienhuys HK, Harryvan D, Kothe G, Levine YK. Influence of High Orientational Order on the Shape of the Echo Response from a Hahn Pulse Sequence. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 1998; 130:253-261. [PMID: 9515091 DOI: 10.1006/jmre.1997.1307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The amplitude modulations in the simulations of the Hahn echo responses from cholestane spin labels in samples characterized by a high degree of orientational order are shown to arise from the use of "soft" pulses. Soft pulses have a limited spectral range and cover only a small portion of the CW-ESR spectra, so that not all the spins are on-resonance. The magnetization vectors of the off-resonance spins only partially tilted away from the laboratory z axis, the direction of the applied static magnetic field. They thus contribute oscillating components to the magnetization in the xy plane. The contribution from the off-resonance spins to the Hahn echo formation is significant in highly oriented samples, but cancels out in samples exhibiting a small degree of order. Experimental echo responses obtained from CSL molecules embedded in rigid matrices of eggPC bilayers and the liquid crystalline materials ZLI and MBBA confirm the theoretical predictions. Copyright 1998 Academic Press.
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Sokolowska D, Moscicki JK. Theory of translational diffusion in the nematic phase. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 54:5221-5226. [PMID: 9965704 DOI: 10.1103/physreve.54.5221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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