Highly Miscible Hybrid Liquid-Crystal Systems Containing Fluorescent Excited-State Intramolecular Proton Transfer Molecules

Doping of luminescent molecules in a nematic liquid-crystal (LC) host is a convenient approach to develop light-emitting LC displays that would be a promising alternative to conventional LC displays. The requirements for the luminescent guest molecules include high miscibility in the host LC, high-o...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 35(2019), 43 vom: 29. Okt., Seite 14031-14041
1. Verfasser: Zhang, Wanying (VerfasserIn)
Weitere Verfasser: Suzuki, Satoshi, Cho, SeongYong, Watanabe, Go, Yoshida, Hiroyuki, Sakurai, Tsuneaki, Aotani, Mika, Tsutsui, Yusuke, Ozaki, Masanori, Seki, Shu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a Doping of luminescent molecules in a nematic liquid-crystal (LC) host is a convenient approach to develop light-emitting LC displays that would be a promising alternative to conventional LC displays. The requirements for the luminescent guest molecules include high miscibility in the host LC, high-order parameters in the host LC media to show anisotropic luminescence, lack of self-absorption, transparency in the visible region, and a large photoluminescence quantum yield independent of its concentration. To address these issues, here, we newly synthesize a highly miscible and fluorescent excited-state intramolecular proton transfer molecule, C4-C≡C-HBT, based on 2-(2-hydroxyphenyl)benzothiazole (HBT). This compound is highly miscible in a conventional room-temperature nematic LC 4-pentyl-4'-cyano biphenyl (5CB) up to 14 wt % (∼12 mol %) and exhibits a large photoluminescence quantum yield of ΦFL = 0.32 in the 5CB host, both of which were achieved by the introduction of an alkynyl group into the HBT core. C4-C≡C-HBT possesses a high-order parameter of S = 0.46 in 5CB, and the C4-C≡C-HBT/5CB mixtures show anisotropic fluorescence whose intensity is controlled by the applied electric field. A patterned image is demonstrated, which is not visible under an ambient environment but is readable upon UV illumination, relying on the orientational differences of ordered C4-C≡C-HBT molecules 
650 4 |a Journal Article 
700 1 |a Suzuki, Satoshi  |e verfasserin  |4 aut 
700 1 |a Cho, SeongYong  |e verfasserin  |4 aut 
700 1 |a Watanabe, Go  |e verfasserin  |4 aut 
700 1 |a Yoshida, Hiroyuki  |e verfasserin  |4 aut 
700 1 |a Sakurai, Tsuneaki  |e verfasserin  |4 aut 
700 1 |a Aotani, Mika  |e verfasserin  |4 aut 
700 1 |a Tsutsui, Yusuke  |e verfasserin  |4 aut 
700 1 |a Ozaki, Masanori  |e verfasserin  |4 aut 
700 1 |a Seki, Shu  |e verfasserin  |4 aut 
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773 1 8 |g volume:35  |g year:2019  |g number:43  |g day:29  |g month:10  |g pages:14031-14041 
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