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Title
Japanese: 
English:The design of liquid crystalline bistolane-based materials with extremely high birefringence 
Author
Japanese: 荒川優樹, 姜聲敏, 渡辺順次, 小西玄一.  
English: yuki arakawa, Sungmin Kang, Junji Watanabe, Gen-ichi Konishi.  
Language English 
Journal/Book name
Japanese: 
English:RSC Advances 
Volume, Number, Page Vol. 6        pp. 92845-92851
Published date Oct. 1, 2016 
Publisher
Japanese: 
English:Royal Society of Chemistry 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://pubs.rsc.org/en/content/articlelanding/2014/ra/c6ra14093a#!divCitation
 
DOI https://doi.org/10.1039/C6RA14093A
Abstract We designed three new bistolanes with alkylsulfanyl groups. A symmetric derivative contains short terminal methylsulfanyl groups (-SC3) on both ends, while two asymmetric derivatives contain a methylsulfanyl group on one end, as well as a highly polarizable cyano (-CN) or isothiocyanate (-NCS) group on the other end. These materials exhibited a well-defined enantiotropic nematic phase, as well as an extremely high birefringence (Δn > 0.6). Most notably, the NCS derivative achieves an extremely high value of 0.77 at 550 nm. These results should be helpful for the design and synthesis of novel nematic materials with high birefringence.

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