Home >

news Help

Publication Information


Title
Japanese: 
English:Push-pull biphenyl and tolane derivatives as novel luminescent liquid crystals: synthesis and properties 
Author
Japanese: 飯田 優斗, 下村 祥通, 戸木田 雅利, 小西 玄一.  
English: Yuuto Iida, Yoshimichi Shimomura, Masatoshi Tokita, Gen-ichi Konishi.  
Language English 
Journal/Book name
Japanese: 
English:Liquid Crystals 
Volume, Number, Page         Earyly View
Published date July 24, 2024 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://doi.org/10.1080/02678292.2024.2381547
 
DOI https://doi.org/10.1080/02678292.2024.2381547
Abstract Addressing the current challenge of high melting points and long π-conjugated skeletons in luminescent nematic liquid crystals (LCs), this study explores the incorporation of push-pull dyes with biphenyl and tolane skeletons to extend fluorescence emission wavelengths into the visible light region. We synthesised push-pull-type biphenyl and tolane derivatives incorporating alkylamino groups as donors and cyano groups as acceptors. The thermal behaviour was investigated using optical polarisation microscopy, differential scanning calorimetry and X-ray diffraction. Notably, some molecules exhibited a nematic phase. The photophysical properties of the solution and solid states were also investigated. Furthermore, we formulated a room-temperature luminescent LC by blending several LCs. Importantly, the fluorescence in the nematic phase exhibited a red-shift compared to that observed in the solution and solid states. This study demonstrates the efficacy of the push-pull structure in the design of luminescent LCs. The findings of this study hold considerable implications for the development of advanced optoelectronic devices, particularly those requiring luminescent materials with tailored properties.

©2007 Institute of Science Tokyo All rights reserved.