Synthesis of liquid crystalline compounds containing thiol groups at both ends as reactive substituents and their immobilization on a gold substrate

Imae Ichiro

Tsukiyama Kazuki

Harima Yutaka

Molecular Crystals and Liquid Crystals

In this study, we synthesized four bifunctional compounds containing two alkoxy groups, at which reactive thiol groups were introduced. Among these compounds, a compound with four and five methylene units in each alkyl chain did not exhibit a liquid crystalline phase. The other three compounds exhibit one or two liquid crystalline phases, and the number of liquid crystalline phases depends on the number of methylene units in their alkyl chains. These liquid crystalline compounds were oriented in one direction using a rubbed alignment film, and the oriented compounds were transferred onto a gold substrate. Using these gold substrates as working electrodes, cyclic voltammetry (CV) was performed with potassium ferricyanide as the redox probe. As the deposition time increased, the current intensities of a pair of redox waves gradually decreased. This trend suggests that with longer deposition times, a larger amount of the liquid crystalline compound was transferred to the gold substrate surface. These findings shed light on the relationship among the structures of bifunctional compounds, their liquid crystalline behavior, and their alignment properties on gold substrates, thereby offering valuable insights for potential applications in nanotechnology and materials science.

gold electrode

liquid crystalline compounds

molecular orientation

thiol group

eng

Taylor & Francis

This is an Accepted Manuscript of an article published by Taylor & Francis in Molecular Crystals and Liquid Crystals on 30 May 2024, available at: https://doi.org/10.1080/15421406.2024.2353972.

This is not the published version. Please cite only the published version.

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[DOI] https://doi.org/10.1080/15421406.2024.2353972 isVersionOf