Dielectric property analysis of supramolecular systems of nematic-smectic hydrogen bonded mixtures

M. K. Sonali; Poornima Bhagavath; Rajeev K. Sinha; P. Preethi Kumari; G. V. Varshini; Jaisas Jeni P. Chandran; S. Sumana

doi:10.1016/j.molliq.2025.128005

Dielectric property analysis of supramolecular systems of nematic-smectic hydrogen bonded mixtures

M. K. Sonali
, Poornima Bhagavath^*
, Rajeev K. Sinha
, P. Preethi Kumari
, G. V. Varshini
, Jaisas Jeni P. Chandran
, S. Sumana

^*Corresponding author for this work

Department of Chemistry, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

New organic Hydrogen Bonded Liquid Crystal (HBLCs) mixtures are developed using a combination of nematic and smectic liquid crystals to obtain P855N and P1855N. This new development formed large, oriented mono domains of liquid crystals encompassing well-aligned nematic and smectic A mesophases. POM results exhibited supercooled phases in shorter chain length molecules, indicating a more extended LC range than their longer-chain counterparts. The V_th increases with decreasing temperature, with an average switching of 3.2 V for P855N and 3.9 V for P1855N. The elastic constants K₁₁ and K₃₃ associated with molecular deformation are inversely proportional to temperature. Longer chain lengths exhibit less activation energy E_a, due to their flexibility. Insights on the hydrogen bond lengths and the additional hydrogen bonds in the molecules obtained through DFT studies help understand the molecular structure, which relates to the observed dielectric behavior of the mixtures.

Original language	English
Article number	128005
Journal	Journal of Molecular Liquids
Volume	434
DOIs	https://doi.org/10.1016/j.molliq.2025.128005
Publication status	Published - 15-09-2025

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry
Materials Chemistry

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10.1016/j.molliq.2025.128005

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title = "Dielectric property analysis of supramolecular systems of nematic-smectic hydrogen bonded mixtures",

abstract = "New organic Hydrogen Bonded Liquid Crystal (HBLCs) mixtures are developed using a combination of nematic and smectic liquid crystals to obtain P855N and P1855N. This new development formed large, oriented mono domains of liquid crystals encompassing well-aligned nematic and smectic A mesophases. POM results exhibited supercooled phases in shorter chain length molecules, indicating a more extended LC range than their longer-chain counterparts. The Vth increases with decreasing temperature, with an average switching of 3.2 V for P855N and 3.9 V for P1855N. The elastic constants K11 and K33 associated with molecular deformation are inversely proportional to temperature. Longer chain lengths exhibit less activation energy Ea, due to their flexibility. Insights on the hydrogen bond lengths and the additional hydrogen bonds in the molecules obtained through DFT studies help understand the molecular structure, which relates to the observed dielectric behavior of the mixtures.",

author = "Sonali, \{M. K.\} and Poornima Bhagavath and Sinha, \{Rajeev K.\} and \{Preethi Kumari\}, P. and Varshini, \{G. V.\} and Chandran, \{Jaisas Jeni P.\} and S. Sumana",

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year = "2025",

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day = "15",

doi = "10.1016/j.molliq.2025.128005",

language = "English",

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journal = "Journal of Molecular Liquids",

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T1 - Dielectric property analysis of supramolecular systems of nematic-smectic hydrogen bonded mixtures

AU - Sonali, M. K.

AU - Bhagavath, Poornima

AU - Sinha, Rajeev K.

AU - Preethi Kumari, P.

AU - Varshini, G. V.

AU - Chandran, Jaisas Jeni P.

AU - Sumana, S.

PY - 2025/9/15

Y1 - 2025/9/15

N2 - New organic Hydrogen Bonded Liquid Crystal (HBLCs) mixtures are developed using a combination of nematic and smectic liquid crystals to obtain P855N and P1855N. This new development formed large, oriented mono domains of liquid crystals encompassing well-aligned nematic and smectic A mesophases. POM results exhibited supercooled phases in shorter chain length molecules, indicating a more extended LC range than their longer-chain counterparts. The Vth increases with decreasing temperature, with an average switching of 3.2 V for P855N and 3.9 V for P1855N. The elastic constants K11 and K33 associated with molecular deformation are inversely proportional to temperature. Longer chain lengths exhibit less activation energy Ea, due to their flexibility. Insights on the hydrogen bond lengths and the additional hydrogen bonds in the molecules obtained through DFT studies help understand the molecular structure, which relates to the observed dielectric behavior of the mixtures.

AB - New organic Hydrogen Bonded Liquid Crystal (HBLCs) mixtures are developed using a combination of nematic and smectic liquid crystals to obtain P855N and P1855N. This new development formed large, oriented mono domains of liquid crystals encompassing well-aligned nematic and smectic A mesophases. POM results exhibited supercooled phases in shorter chain length molecules, indicating a more extended LC range than their longer-chain counterparts. The Vth increases with decreasing temperature, with an average switching of 3.2 V for P855N and 3.9 V for P1855N. The elastic constants K11 and K33 associated with molecular deformation are inversely proportional to temperature. Longer chain lengths exhibit less activation energy Ea, due to their flexibility. Insights on the hydrogen bond lengths and the additional hydrogen bonds in the molecules obtained through DFT studies help understand the molecular structure, which relates to the observed dielectric behavior of the mixtures.

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DO - 10.1016/j.molliq.2025.128005

M3 - Article

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VL - 434

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

M1 - 128005

ER -

Dielectric property analysis of supramolecular systems of nematic-smectic hydrogen bonded mixtures

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