Reassessment of structure of smectic phases: Nano-segregation in smectic E phase in 4-n-alkyl-4′-isothiocyanato-1,1′-biphenyls

Kazuya Saito, Takahito Miyazawa, Akio Fujiwara, Mafumi Hishida, Hideki Saitoh, Maria Massalska-Arodź, Yasuhisa Yamamura
2013 Journal of Chemical Physics  
Based on new diffraction data from aligned samples of smectic E (SmE) phase of 4-n-alkyl-4isothiocyanato-1,1 -biphenyls, systematics against the alkyl chain length n is analyzed. In order to perform the analysis, the molecular form factor approximated by a box-shaped distribution is calculated while taking the rounding of the distribution at corners into account. The analysis clearly shows the nano-segregated layered structure, which does not fit to the traditional structural view of SmE phase
more » ... ut does fit to the model the present authors proposed recently. Some implications of this conclusion are discussed in relation to the importance of the molten state of alkyl chains in most of real mesogens revealed previously through thermodynamic analyses. © 2013 AIP Publishing LLC.
doi:10.1063/1.4821162 pmid:24070306 fatcat:edtdma3xv5bybevxnmdnuwca2u