TEKOČI KRISTALI
nematski smektični A smektični C
Vrsta
molekul tekočih kristralov vsebuje dušik. Gibanje molekul deloma
izpovpreči gradient električnega polja na mestu dušika. Zaradi tega
se spremene kvadrupolne resonančne frekvence 14N. Zaradi gibanja
molekul se deloma izpovpreči tudi tenzor anizotropije kemijskega premika
jeder, na primer 13C. Z merjenjem kvadrupolnih resonančnih
frekvenc 14N in kemijskega premika 13C preučujemo
gibanje in urejenost molekul v tekočih kristalih.
Objavljena
dela:
1. J. Seliger, R.
Osredkar, M. Mali, R. Blinc, 14N quadrupole resonance of some
liquid
crystalline compounds in the solid, J. Chem. Phys. 65, 2887-2891 (1976)
2. J. Seliger, R.
Osredkar, V. Žagar, R. Blinc, Orientational order in biaxial liquid
crystals, Phys. Rev. Letters 38,
411-415 (1977)
3. R. Blinc, M.
Vilfan, M. Luzar, J. Seliger, V. Žagar, Spin-lattice relaxation
mechanisms in
the smectic phases of TBBA, J. Chem. Phys. 68, 303-307 (1978)
4. J. Seliger, V.
Žagar, R. Blinc, 14N Nuclear-quadrupole-resonance study of
orientational
ordering in the smectic phases of achiral TBBA and chiral TBACA,
Phys. Rev. A 17,
1149-1155 (1978)
5. R. Blinc, J.
Seliger, M. Vilfan, V. Žagar, Temperature dependence of orientational
ordering in the
smectic H and smectic VI phases of TBBA, J. Chem. Phys. 70,
778-783 (1979)
6. M. Vilfan, R.
Blinc, J. Seliger, V. Žagar, Molecular orientational ordering in the
smectic C* and
H* phases of chiral TBACA, Ferroelectrics 24, 211-214 (1980)
7. M. Luzar, V.
Rutar, J. Seliger, M. Burgar, R. Blinc, 13C NMR study of the
ferroelectric
liquid crystal DOBAMBC, Ferroelectrics 24, 215-218 (1980)
8. M. Vilfan, J.
Seliger, V. Žagar, R. Blinc, 14N NQR and 1H NMR
study of the
smectic phase
of IBPBAC, Phys. Letters A 79, 186-188 (1980)
9. R. Blinc, M.
Vilfan, J. Seliger, 14N NQR and orientational ordering in smectic liquid
crystals, Bull.
Magn. Reson. 5, 51-76 (1983)
10. M. Luzar, V. Rutar, J. Seliger, R. Blinc, 13C
NMR in ferroelectric smectic liquid
crystals,
Ferroelectrics 58, 115-132 (1984)
11. R. Blinc, J. Dolinšek, M. Luzar, J. Seliger, 13C
N.M.R. and 14N
N.Q.R. in
ferroelectric
liquid crystals. Polar versus quadrupolar ordering, Liquid Crystals 3,
663-675 (1988)
12. J. Seliger, V. Žagar, 14N nuclear
quadrupole resonance in solid 4,4′-
azoxyanisole
and 4,4′- bis(heptyloxy)azoxybenzene, Chemical Physics 306,
309-314 (2004)
13. A. Gradišek, P. J. Sebastiăo,
S. N. Fernandes, T. Apih, M. H. Godinho,
J. Seliger,
1H-2H Cross-Relaxation Study in a Partially Deuterated Nematic
Liquid Crystal, J. Phys. Chem. B 118,
5600-5607 (2014)
DOI:
10.1021/jp502542q