mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-169Research ArticleСтатьиSpin probe orientation distribution functions in aligned nematic liquid crystalYankovaT. S.

Leninskie gory, 1/3, Moscow 119991

ya.tatiana@gmail.comChumakovaN. A.

Leninskie gory, 1/3, Moscow 119991

PomogailoD. A.

Leninskie gory, 1/3, Moscow 119991

VorobievA. Kh.

Leninskie gory, 1/3, Moscow 119991

Department of Chemistry, Lomonosov Moscow State UniversityRussian Federation2011200120241321013Copyright © Yankova T.S., Chumakova N.A., Pomogailo D.A., Vorobiev A.K., 20242024Yankova T.S., Chumakova N.A., Pomogailo D.A., Vorobiev A.K.Yankova T.S., Chumakova N.A., Pomogailo D.A., Vorobiev A.K.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/169

Orientation distribution functions of nitroxide spin probe in nematic liquid crystal 5CB embedded into porous polyethylene film were determined at 295 K and at 77 K by numerical simulation of electron paramagnetic resonance (EPR) spectra. The procedure of simulation of EPR spectra at 77 K in the absence of molecular mobility of spin probe molecules allows determination of non-equilibrium orientational distribution function in supercooled liquid crystals. The suggested procedure yields an orientation distribution function of orientational axis of a spin probe molecule. Orientation distribution functions for the sample at 295 K and 77 K were found to be similar.

spin probe methodorientation distribution functionEPR spectra angular dependencealigned liquid crystalsnumerical simulationspectrum fittingThis work was supported by the Russian Foundation for Basic Research, grants No. 09-03-00900 and 09-03-12234-ofi_m.ReferencesSpin Labeling: Theory and Applications, edited by Berliner L.J., Reuben J., Plenum Press, New York (1989)Spin Labeling: Theory and Applications, edited by Berliner L.J., Reuben J., Plenum Press, New York (1989)Meirovitch E., Igner D., Igner E., Mora G., Freed J. H. Chem. Phys. 77, 3915 (1982)Meirovitch E., Igner D., Igner E., Mora G., Freed J. H. Chem. Phys. 77, 3915 (1982)Luckhurst G.R. Thin Solid Films 509, 36 (2006)Luckhurst G.R. Thin Solid Films 509, 36 (2006)Vorobiev A.Kh., Chumakova N.A. J. Magn. Reson. 175, 146 (2005)Vorobiev A.Kh., Chumakova N.A. J. Magn. Reson. 175, 146 (2005)Elyashevich G., Kozlov A., Moneva I. Polymer Science Series B 40, 71 (1998)Elyashevich G., Kozlov A., Moneva I. Polymer Science Series B 40, 71 (1998)Bobrovsky A., Shibaev V., Elyashevich G., Rosova E., Shimkin A., Shirinyan V., Cheng K.-L.Bobrovsky A., Shibaev V., Elyashevich G., Rosova E., Shimkin A., Shirinyan V., Cheng K.-L.Polym. Adv. Technol. 21, 100 (2010)Polym. Adv. Technol. 21, 100 (2010)Ikuma N., Tamura R., Shimono S., Uchida Y., Masaki K., Yamauchi J., Aoki Y., Nohira H. Adv. Mater. 18, 477 (2006)Ikuma N., Tamura R., Shimono S., Uchida Y., Masaki K., Yamauchi J., Aoki Y., Nohira H. Adv. Mater. 18, 477 (2006)Chumakova N.A., Vorobiev A.Kh., Ikuma N., Uchida Y., Tamura R. Mendeleev Commun. 18, 21 (2008)Chumakova N.A., Vorobiev A.Kh., Ikuma N., Uchida Y., Tamura R. Mendeleev Commun. 18, 21 (2008)Budil D.E., Lee S., Saxena S., Freed J.H. J. Magn. Reson. Series A 120, 155 (1996)Budil D.E., Lee S., Saxena S., Freed J.H. J. Magn. Reson. Series A 120, 155 (1996)

The authors declare that there are no conflicts of interest present.