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Title
Japanese: 
English:Synthesis of Side-Chain Liquid Crystalline Polyacrylates with Bridged Stilbene Mesogens 
Author
Japanese: 小西玄一, 猿渡 悠生, 岩井 梨輝, 田中 拓哉, 下村 祥通, 戸木田 雅利.  
English: Gen-ichi Konishi, Yuki, Riki Iwai, Takuya Tanaka, Yoshimichi Shimomura, Masatoshi Tokita.  
Language English 
Journal/Book name
Japanese: 
English:Molecules 
Volume, Number, Page Vol. 29    No. 21    p. 5220
Published date Nov. 4, 2024 
Publisher
Japanese: 
English:MDPI 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://www.mdpi.com/1420-3049/29/21/5220
 
DOI https://doi.org/10.3390/molecules29215220
Abstract In recent years, π-conjugated liquid crystalline molecules with optoelectronic functionalities have garnered considerable attention, and integrating these molecules into side-chain liquid crystalline polymers (SCLCPs) holds potential for developing devices operational near room temperature. However, it is difficult to design SCLCPs with excellent processability because liq-uid crystalline mesogens are rigid rods, have low solubility in organic solvents, and have a high isotropization temperature. Recently, we developed near-room-temperature π-conjugated ne-matic liquid crystals based on “bridged stilbene.” In this work, we synthesized a polyacrylate SCLCP incorporating a bridged stilbene that exhibited a nematic phase near room temperature and could maintain liquid crystallinity for more than three months. We conducted a thorough phase structure analysis and evaluated the optical properties. The birefringence values of the resulting polymers were higher than those of the corresponding monomers because of the en-hanced order parameters due to the polymer effect.　In addition, the synthesized polymers in-herited mesogen-derived AIE properties, with high quantum yields (Φfl = 0.14–0.35) in the solid state. It is noteworthy that the maximum fluorescence wavelength exhibited a redshift of greater than 27 nm as a consequence of film formation. Thus, several unique characteristics of the SCLCPs are unattainable with small molecular systems.

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