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Title: Self-Assembly Behavior of an Oligothiophene-Based Conjugated Liquid Crystal and Its Implication for Ionic Conductivity Characteristics

Abstract

Abstract In this work, a joint experimental and computational study on the synthesis, self‐assembly, and ionic conduction characteristics of a new conjugated liquid crystal quaterthiophene/poly(ethylene oxide) (PEO4) consisting of terminal tetraethyleneglycol monomethyl ether groups on both ends of a quaterthiophene core is performed. In agreement with molecular dynamic simulations, temperature‐dependent grazing‐incidence wide angle X‐ray scattering and X‐ray diffraction indicate that the molecule spontaneously forms a smectic phase at ambient temperature as characterized both in bulk and thin film configurations. Significantly, this smectic phase is maintained upon blending with bis(trifluoro‐methanesulfonyl)imide as ion source at a concentration ratio up to r = [Li + ]/[EO] = 0.05. Nanosegregation between oligothiophene and PEO moieties and π–π stacking of thiophene rings lead to the formation of efficient 2D pathways for ion transport, resulting in thin‐film in‐plane ionic conductivity as high as 5.2 × 10 −4 S cm −1 at 70 °C and r = 0.05 as measured by electrochemical impedance spectroscopy. Upon heating the samples above a transition temperature around 95 °C, an isotropic phase forms associated with a pronounced drop in ionic conductivity. Upon cooling, partial and local reordering of the conducting smectic domains leads to an ionic conductivity decrease compared to themore » as‐cast state.« less

Authors:
 [1];  [2];  [1];  [1];  [3];  [4]; ORCiD logo [1];  [4]; ORCiD logo [1]
+ Show Author Affiliations
  1. Cornell Univ., Ithaca, NY (United States)
  2. Univ. of Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1491829
Alternate Identifier(s):
OSTI ID: 1482268
Grant/Contract Number:  
AC02-06CH11357; DE‐AC02‐06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 29; Journal Issue: 2; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ionic conductivity; liquid crystal; oligothiophene; self-assembly; π-π interactions

Citation Formats

Liu, Ziwei, Dong, Ban Xuan, Misra, Mayank, Sun, Yangyang, Strzalka, Joseph, Patel, Shrayesh N., Escobedo, Fernando A., Nealey, Paul F., and Ober, Christopher K. Self-Assembly Behavior of an Oligothiophene-Based Conjugated Liquid Crystal and Its Implication for Ionic Conductivity Characteristics. United States: N. p., 2018. Web. doi:10.1002/adfm.201805220.
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Liu, Ziwei, Dong, Ban Xuan, Misra, Mayank, Sun, Yangyang, Strzalka, Joseph, Patel, Shrayesh N., Escobedo, Fernando A., Nealey, Paul F., & Ober, Christopher K. Self-Assembly Behavior of an Oligothiophene-Based Conjugated Liquid Crystal and Its Implication for Ionic Conductivity Characteristics. United States. https://doi.org/10.1002/adfm.201805220
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Liu, Ziwei, Dong, Ban Xuan, Misra, Mayank, Sun, Yangyang, Strzalka, Joseph, Patel, Shrayesh N., Escobedo, Fernando A., Nealey, Paul F., and Ober, Christopher K. Wed . "Self-Assembly Behavior of an Oligothiophene-Based Conjugated Liquid Crystal and Its Implication for Ionic Conductivity Characteristics". United States. https://doi.org/10.1002/adfm.201805220. https://www.osti.gov/servlets/purl/1491829.
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@article{osti_1491829,
title = {Self-Assembly Behavior of an Oligothiophene-Based Conjugated Liquid Crystal and Its Implication for Ionic Conductivity Characteristics},
author = {Liu, Ziwei and Dong, Ban Xuan and Misra, Mayank and Sun, Yangyang and Strzalka, Joseph and Patel, Shrayesh N. and Escobedo, Fernando A. and Nealey, Paul F. and Ober, Christopher K.},
abstractNote = {Abstract In this work, a joint experimental and computational study on the synthesis, self‐assembly, and ionic conduction characteristics of a new conjugated liquid crystal quaterthiophene/poly(ethylene oxide) (PEO4) consisting of terminal tetraethyleneglycol monomethyl ether groups on both ends of a quaterthiophene core is performed. In agreement with molecular dynamic simulations, temperature‐dependent grazing‐incidence wide angle X‐ray scattering and X‐ray diffraction indicate that the molecule spontaneously forms a smectic phase at ambient temperature as characterized both in bulk and thin film configurations. Significantly, this smectic phase is maintained upon blending with bis(trifluoro‐methanesulfonyl)imide as ion source at a concentration ratio up to r = [Li + ]/[EO] = 0.05. Nanosegregation between oligothiophene and PEO moieties and π–π stacking of thiophene rings lead to the formation of efficient 2D pathways for ion transport, resulting in thin‐film in‐plane ionic conductivity as high as 5.2 × 10 −4 S cm −1 at 70 °C and r = 0.05 as measured by electrochemical impedance spectroscopy. Upon heating the samples above a transition temperature around 95 °C, an isotropic phase forms associated with a pronounced drop in ionic conductivity. Upon cooling, partial and local reordering of the conducting smectic domains leads to an ionic conductivity decrease compared to the as‐cast state.},
doi = {10.1002/adfm.201805220},
journal = {Advanced Functional Materials},
number = 2,
volume = 29,
place = {United States},
year = {Wed Nov 14 00:00:00 EST 2018},
month = {Wed Nov 14 00:00:00 EST 2018}
}
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  • DOI: 10.1002/chin.200532292

Functional Liquid-Crystalline Assemblies: Self-Organized Soft Materials
journal, April 2006

  • Kato, Takashi; Mizoshita, Norihiro; Kishimoto, Kenji
  • ChemInform, Vol. 37, Issue 15
  • DOI: 10.1002/chin.200615236

Nanotechnology with Soft Materials
journal, July 2003

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    Real‐Time Imaging of Ammonia Release from Single Live Cells via Liquid Crystal Droplets Immobilized on the Cell Membrane
    journal, August 2019

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