Next Article in Journal
Effects of Lipoic Acid on Immune Function, the Antioxidant Defense System, and Inflammation-Related Genes Expression of Broiler Chickens Fed Aflatoxin Contaminated Diets
Previous Article in Journal
Interleukin-6 Receptor rs7529229 T/C Polymorphism Is Associated with Left Main Coronary Artery Disease Phenotype in a Chinese Population
Previous Article in Special Issue
Dynamics of Order Reconstruction in a Nanoconfined Nematic Liquid Crystal with a Topological Defect
Int. J. Mol. Sci. 2014, 15(4), 5634-5648; doi:10.3390/ijms15045634
Article

Liquid Crystalline Assembly of Coil-Rod-Coil Molecules with Lateral Methyl Groups into 3-D Hexagonal and Tetragonal Assemblies

1,†
,
1,†
,
2
,
3
,
1,*  and 1,*
1 Key Laboratory for Organism Resources of the Changbai Mountain and Functional Molecules, Department of Chemistry, College of Science, Yanbian University, No.977 Gongyuan Road, Yanji 133002, China 2 College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China 3 Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China These authors contributed equally to this work.
* Authors to whom correspondence should be addressed.
Received: 16 October 2013 / Revised: 3 March 2014 / Accepted: 11 March 2014 / Published: 2 April 2014
View Full-Text   |   Download PDF [875 KB, uploaded 19 June 2014]   |  

Abstract

In this paper, we report the synthesis and self-assembly behavior of coil-rod-coil molecules, consisting of three biphenyls linked through a vinylene unit as a conjugated rod segment and poly(ethylene oxide) (PEO) with a degree of polymerization (DP) of 7, 12 and 17, incorporating lateral methyl groups between the rod and coil segments as the coil segment. Self-organized investigation of these molecules by means of differential scanning calorimetry (DSC), thermal polarized optical microscopy (POM) and X-ray diffraction (XRD) reveals that the lateral methyl groups attached to the surface of rod and coil segments, dramatically influence the self-assembling behavior in the liquid-crystalline mesophase. Molecule 1 with a relatively short PEO coil length (DP = 7) self-assembles into rectangular and oblique 2-dimensional columnar assemblies, whereas molecules 2 and 3 with DP of 12 and 17 respectively, spontaneously self-organize into unusual 3-dimensional hexagonal close-packed or body-centered tetragonal assemblies.
Keywords: coil-rod-coil; self-assembly; columnar; hexagonal; tetragonal; small angle X-ray scattering (SAXS) coil-rod-coil; self-assembly; columnar; hexagonal; tetragonal; small angle X-ray scattering (SAXS)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Supplementary material

SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Wang, Z.; Lan, Y.; Zhong, K.; Liang, Y.; Chen, T.; Jin, L.Y. Liquid Crystalline Assembly of Coil-Rod-Coil Molecules with Lateral Methyl Groups into 3-D Hexagonal and Tetragonal Assemblies. Int. J. Mol. Sci. 2014, 15, 5634-5648.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert