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Title: Nanophase Segregation in Binary Mixtures of a Bent-Core and a Rodlike Liquid-Crystal Molecule

Abstract

We studied mixtures of the achiral bent-core mesogen NOBOW 1,3-phenylene bis[4-(4-9-alkoxyphenyliminonetyl)benzoates] (P-9-O-PIMB) and the small, rodlike liquid crystal 8CB using high-resolution synchrotron x-ray diffraction, freeze fracture transmission electron microscopy, and differential scanning calorimetry. NOBOW and 8CB mix in an isotropic state at high temperatures but phase separate at lower temperatures when NOBOW transforms into the B4 phase and forms chiral helical nanofilaments. In pure NOBOW, the nanofilaments are close packed but at moderate 8CB concentrations, they are separated by nanosized gaps filled by 8CB. At higher concentrations of 8CB, macroscopic phase separation occurs.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1019847
Report Number(s):
BNL-96020-2011-JA
Journal ID: ISSN 1539-3755; TRN: US201115%%483
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review E, Statistical, Nonlinear, and Soft Matter Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 1; Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BINARY MIXTURES; CALORIMETRY; FRACTURES; LIQUID CRYSTALS; MIXTURES; RACEMATES; SEGREGATION; SYNCHROTRONS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; national synchrotron light source

Citation Formats

Zhu, C., Chen, D, Shen, Y, Jones, C, Glaser, M, Maclennan, J, and Clark, N. Nanophase Segregation in Binary Mixtures of a Bent-Core and a Rodlike Liquid-Crystal Molecule. United States: N. p., 2010. Web. doi:10.1103/PhysRevE.81.011704.
Zhu, C., Chen, D, Shen, Y, Jones, C, Glaser, M, Maclennan, J, & Clark, N. Nanophase Segregation in Binary Mixtures of a Bent-Core and a Rodlike Liquid-Crystal Molecule. United States. doi:10.1103/PhysRevE.81.011704.
Zhu, C., Chen, D, Shen, Y, Jones, C, Glaser, M, Maclennan, J, and Clark, N. Fri . "Nanophase Segregation in Binary Mixtures of a Bent-Core and a Rodlike Liquid-Crystal Molecule". United States. doi:10.1103/PhysRevE.81.011704.
@article{osti_1019847,
title = {Nanophase Segregation in Binary Mixtures of a Bent-Core and a Rodlike Liquid-Crystal Molecule},
author = {Zhu, C. and Chen, D and Shen, Y and Jones, C and Glaser, M and Maclennan, J and Clark, N},
abstractNote = {We studied mixtures of the achiral bent-core mesogen NOBOW 1,3-phenylene bis[4-(4-9-alkoxyphenyliminonetyl)benzoates] (P-9-O-PIMB) and the small, rodlike liquid crystal 8CB using high-resolution synchrotron x-ray diffraction, freeze fracture transmission electron microscopy, and differential scanning calorimetry. NOBOW and 8CB mix in an isotropic state at high temperatures but phase separate at lower temperatures when NOBOW transforms into the B4 phase and forms chiral helical nanofilaments. In pure NOBOW, the nanofilaments are close packed but at moderate 8CB concentrations, they are separated by nanosized gaps filled by 8CB. At higher concentrations of 8CB, macroscopic phase separation occurs.},
doi = {10.1103/PhysRevE.81.011704},
journal = {Physical Review E, Statistical, Nonlinear, and Soft Matter Physics},
issn = {1539-3755},
number = 1,
volume = 81,
place = {United States},
year = {2010},
month = {1}
}