Open Access

Journal of Molecular Liquids, volume 339, pages 117141

Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants

Budagovsky I. A. ¹

Kuznetsov Aleksey M. ¹

Shvetsov S. A. ^{2, 3}

Smayev Mikhail ¹

Zolotko Alexander ¹

Cigl Martin ⁴

Hamplová V. ⁴

Bobrovsky Alexey ⁵

Hide authors affiliations Show authors affiliations: 5 affiliations

P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninsky pr. 53, Moscow 119991, Russia |

Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia |

P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninsky pr., 53, Moscow 119991, Russia |

⁴

Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic. |

⁵

Lomonosov Moscow State University Leninskie Gory Moscow 119991 Russia |

Publication type: Journal Article

Publication date: 2021-10-01

Elsevier

Journal: Journal of Molecular Liquids

Quartile SCImago

Quartile WOS

Impact factor: 6

ISSN: 01677322, 18733166

DOI: 10.1016/j.molliq.2021.117141

Copy DOI

Materials Chemistry

Electronic, Optical and Magnetic Materials

Physical and Theoretical Chemistry

Spectroscopy

Atomic and Molecular Physics, and Optics

Condensed Matter Physics

Abstract

• Incorporation of bis-azobenzene monomer into the polymeric chain increases the sign-alternating nonlinearity of an NLC. • After incorporation the orientational nonlinearity increases in both positive and negative regions. • Critical angle of the sign-alternating nonlinearity decreases for polymeric molecule. • Passage from the low- to the high-molar-mass dopant increases enhancement factors related to trans- and cis -isomers. A comparative study of optical orientation in nematic liquid crystals (NLCs) doped with a low-molar-mass bis-azobenzene dye (monomer) and a comb-shaped polymer with side fragments similar in structure to the monomer has been carried out. Both types of bis-azobenzene dopants induced a sign-alternating nonlinearity in the NLC: the positive when the angle Ψ between the light field and the director is less than a certain critical value Ψc and the negative in the opposite case of Ψ c < Ψ ≤ 90°. The transition from the monomer to polymer led to a decrease in the critical angle Ψ c , i.e., to an expansion of the region of negative nonlinearity. At the same concentration of chromophores, an increase in both negative and positive nonlinearities occurs. The magnitudes of the optical-torque enhancement factors due to trans- and cis -isomers (η T and η C ), and the ratios η T /η C for the low- and high-molar-mass dopants are compared. The results obtained show the possibilities of increasing the orientational optical nonlinearity when passing from low-molar bis-azobenzene dye dopants to the corresponding polymers and are important for elucidating the optimal architecture of absorbing additives.

By date By citations

Citations by journals

	1
Optik	Optik, 1, 50% Optik 1 publication, 50%
	1

Citations by publishers

	1
Elsevier	Elsevier, 1, 50% Elsevier 1 publication, 50%
	1

We do not take into account publications that without a DOI.
Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
Statistics recalculated weekly.

{"yearsCitations":{"type":"bar","data":{"show":true,"labels":[2022,2023],"ids":[0,0],"codes":[0,0],"imageUrls":["",""],"datasets":[{"label":"Citations number","data":[1,1],"backgroundColor":["#3B82F6","#3B82F6"],"percentage":["50","50"],"barThickness":null}]},"options":{"indexAxis":"x","maintainAspectRatio":true,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":1,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Citations per year","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}},"journals":{"type":"bar","data":{"show":true,"labels":["Optik"],"ids":[16053],"codes":[0],"imageUrls":["\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp"],"datasets":[{"label":"","data":[1],"backgroundColor":["#3B82F6"],"percentage":[50],"barThickness":13}]},"options":{"indexAxis":"y","maintainAspectRatio":false,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":null,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Journals","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}},"publishers":{"type":"bar","data":{"show":true,"labels":["Elsevier"],"ids":[17],"codes":[0],"imageUrls":["\/storage\/images\/resized\/GDnYOu1UpMMfMMRV6Aqle4H0YLLsraeD9IP9qScG_medium.webp"],"datasets":[{"label":"","data":[1],"backgroundColor":["#3B82F6"],"percentage":[50],"barThickness":13}]},"options":{"indexAxis":"y","maintainAspectRatio":false,"scales":{"y":{"ticks":{"precision":0,"autoSkip":false,"font":{"family":"Montserrat"},"color":"#000000"}},"x":{"ticks":{"stepSize":null,"precision":0,"font":{"family":"Montserrat"},"color":"#000000"}}},"plugins":{"legend":{"position":"top","labels":{"font":{"family":"Montserrat"},"color":"#000000"}},"title":{"display":true,"text":"Publishers","font":{"size":24,"family":"Montserrat","weight":600},"color":"#000000"}}}}}

Metrics

Cite this

GOST |

Cite this

GOST Copy

Budagovsky I. A. et al. Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants // Journal of Molecular Liquids. 2021. Vol. 339. p. 117141.

GOST all authors (up to 50) Copy

Budagovsky I. A., Kuznetsov A. M., Shvetsov S. A., Smayev M., Zolotko A., Cigl M., Hamplová V., Bobrovsky A. Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants // Journal of Molecular Liquids. 2021. Vol. 339. p. 117141.

RIS |

Cite this

RIS Copy

TY - JOUR

DO - 10.1016/j.molliq.2021.117141

UR - https://doi.org/10.1016%2Fj.molliq.2021.117141

TI - Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants

T2 - Journal of Molecular Liquids

AU - Budagovsky, I. A.

AU - Kuznetsov, Aleksey M.

AU - Shvetsov, S. A.

AU - Smayev, Mikhail

AU - Zolotko, Alexander

AU - Cigl, Martin

AU - Hamplová, V.

AU - Bobrovsky, Alexey

PY - 2021

DA - 2021/10/01 00:00:00

PB - Elsevier

SP - 117141

VL - 339

SN - 0167-7322

SN - 1873-3166

ER -

BibTex

Cite this

BibTex Copy

@article{2021_Budagovsky,

author = {I. A. Budagovsky and Aleksey M. Kuznetsov and S. A. Shvetsov and Mikhail Smayev and Alexander Zolotko and Martin Cigl and V. Hamplová and Alexey Bobrovsky},

title = {Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants},

journal = {Journal of Molecular Liquids},

year = {2021},

volume = {339},

publisher = {Elsevier},

month = {oct},

url = {https://doi.org/10.1016%2Fj.molliq.2021.117141},

pages = {117141},

doi = {10.1016/j.molliq.2021.117141}

}

Found error?

Publisher

Elsevier

Journal

Journal of Molecular Liquids

Quartile SCImago

Quartile WOS

Impact factor

ISSN

01677322 (Print)
18733166 (Electronic)

Profiles