TY - JOUR
T1 - Carbonyl- and thioether-linked cyanobiphenyl-based liquid crystal dimers exhibiting twist-bend nematic phases
AU - Arakawa, Yuki
AU - Komatsu, Kenta
AU - Ishida, Yuko
AU - Igawa, Kazunobu
AU - Tsuji, Hideto
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (KAKENHI grant no. 17K14493 and 20K15351 ), the Naito Research Grant, and research grants from the Toukai Foundation for Technology and Toyohashi University of Technology . We are grateful to Ms. Tsugumi Shiokawa and Dr. Hiroko Tada from the Division of Instrumental Analysis (Okayama University) for carrying out the mass spectrometry measurements.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/2/12
Y1 - 2021/2/12
N2 - A homologous series of ketone-type liquid crystal (LC) dimers, namely carbonyl- and thioether-linked cyanobiphenyl-based bent LC dimers (CBCOnSCB), with odd numbers of alkylene spacers (n = 3, 5, 7, and 9), was developed. CBCOnSCB dimers (n = 3, 5, and 7) formed a twist-bend nematic (NTB) phase below the nematic (N) phase. The N to NTB phase-transition temperatures of CBCOnSCB were higher than those of previously reported symmetric bis(thioether)-linked CBSnSCB and asymmetric ether- and thioether-linked CBOnSCB analogs. Compared to the vitrifiable CBSnSCB and CBOnSCB analogs, CBCOnSCB tended to crystallize. Single-crystal X-ray structural analysis of CBCO5SCB was also performed.
AB - A homologous series of ketone-type liquid crystal (LC) dimers, namely carbonyl- and thioether-linked cyanobiphenyl-based bent LC dimers (CBCOnSCB), with odd numbers of alkylene spacers (n = 3, 5, 7, and 9), was developed. CBCOnSCB dimers (n = 3, 5, and 7) formed a twist-bend nematic (NTB) phase below the nematic (N) phase. The N to NTB phase-transition temperatures of CBCOnSCB were higher than those of previously reported symmetric bis(thioether)-linked CBSnSCB and asymmetric ether- and thioether-linked CBOnSCB analogs. Compared to the vitrifiable CBSnSCB and CBOnSCB analogs, CBCOnSCB tended to crystallize. Single-crystal X-ray structural analysis of CBCO5SCB was also performed.
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U2 - 10.1016/j.tet.2020.131870
DO - 10.1016/j.tet.2020.131870
M3 - Article
AN - SCOPUS:85100162929
SN - 0040-4020
VL - 81
JO - Tetrahedron
JF - Tetrahedron
M1 - 131870
ER -