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NMR investigation o...
NMR investigation of a thermotropic liquid crystal showing isotropic-isotropic'-(columnar)-cubic phase transitions
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Cifelli, M. (författare)
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Domenici, V. (författare)
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Gorecka, E. (författare)
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Wojcik, M. (författare)
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- Dvinskikh, Sergey, 1963- (författare)
- KTH,Tillämpad fysikalisk kemi,St. Petersburg State University, Russian Federation
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(creator_code:org_t)
- 2017-09
- 2017
- Engelska.
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Ingår i: Molecular Crystals and Liquid Crystals. - : Taylor and Francis Inc.. - 1542-1406 .- 1563-5287. ; 649:1, s. 20-30
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work, we report a first detailed study of the mesophasic behaviour of the calamitic liquid crystal, a (4,4′-bis(4″-carboxybelzyloxy)biphenyl derivate, labelled 9/2 RS/RS, showing an isotropic-isotropic-(columnar)-cubic phase behaviour on cooling. 1H NMR diffusometry allowed to distinguish between the two isotropic phases in terms of diffusion characterized by different Arrhenius activation energy, while 13C NMR static measurements and 2H NMR investigations were of help in understanding the orientational ordering properties of the metastable columnar phase and confirmed the isotropic state of the sample in the cubic phase.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Liquid crystals
- Metastable phases
- Thermotropic liquid crystals
- Arrhenius activation energy
- Calamitic liquid crystal
- Columnar phase
- Isotropic phasis
- Isotropic state
- NMR diffusometry
- Orientational orderings
- Static measurements
- Activation energy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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