Solution-processed planarly oriented thin films of cholesteric liquid-crystalline semiconductors

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2024-11-06 DOI:10.1016/j.molliq.2024.126425

Shuhei Morishita , Masaki Kunihiro , Masahiro Funahashi , Noriaki Tsurumachi

引用次数: 0

Abstract

We have successfully fabricated cholesteric liquid-crystalline (CLC) semiconductor thin films from the mixture of dimeric and monomeric compounds based on oligo(p-phenylenevinylene) units by spin-coating method. This is the first example of solution-processed planarly orientated thin film in CLC semiconductors. The mixture exhibited a CLC phase at lower temperatures than the compound alone, allowing the fabrication of spin-coated CLC thin films at room temperature. Furthermore, the dimeric compound has trifluoromethyl groups that exhibited high solubility in organic solvents such as chloroform due to its improved hydrophobicity. In addition, the high hydrophobicity of the trifluoromethyl groups lowers the surface tension of the liquid–crystal material, resulting in planar orientation.

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溶液加工的胆甾液晶半导体平面取向薄膜

我们采用旋涂法，成功地从基于低聚（对苯基乙烯）单元的二聚体和单体化合物混合物中制备出了胆甾型液晶（CLC）半导体薄膜。这是第一例溶液加工的 CLC 半导体平面取向薄膜。与单独的化合物相比，该混合物在较低温度下显示出 CLC 相，因此可以在室温下制造旋涂 CLC 薄膜。此外，二聚化合物含有三氟甲基，由于疏水性得到改善，在氯仿等有机溶剂中具有很高的溶解度。此外，三氟甲基基团的高疏水性降低了液晶材料的表面张力，从而导致平面取向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.