BROWSE

Related Researcher

Author's Photo

Shin, Tae Joo
UNIST Synchrotron Radiation Research Laboratory
Research Interests
  • Synchrotron Radiation Application Researches

ITEM VIEW & DOWNLOAD

Non-classical temperature-dependent phase sequence: long-lived metastable piezoelectric helical columnar liquid crystalline polymorph

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Non-classical temperature-dependent phase sequence: long-lived metastable piezoelectric helical columnar liquid crystalline polymorph
Author
Nguyen, Manh LinhByun, JaedukShin, Tae JooCho, Byoung-Ki
Issue Date
2021-06
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY C
Abstract
Polymorphism is an intriguing research topic, because multiple functionalities can be accessed from a single material. Herein, we report the unusual polymorphic behavior of a liquid crystalline (LC) naphthalene derivative (1) based on 1,2,3-triazolyl linkages. Two individual polymorphs corresponding to metastable helical columnar (Col(hel)) LC and thermodynamically stable monoclinic crystalline (Cry) phases can be obtained at room temperature by mild thermal treatments. According to the thermal, dynamic, and structural analyses of 1, the triazolyl H-bonded network along the columnar axis plays a key role in the formation of the polar helical columnar order and its longevity. As a consequence of the remarkable stability of the metastable Col(hel), a non-classical phase sequence, that is, Col(hel)-liquid-cry-liquid upon heating, was observed for the first time, although it was also predicted theoretically in monotropic LC polymorphism. Interestingly, piezoelectric measurement of the poled Col(hel) polymorph showed a noticeable increase in open-circuit voltage upon the application of force, which was more than five times greater than the measured voltage of the Cry polymorph.
URI
https://scholarworks.unist.ac.kr/handle/201301/53136
URL
https://pubs.rsc.org/en/content/articlelanding/2021/TC/D1TC02166D#!divAbstract
DOI
10.1039/d1tc02166d
ISSN
2050-7526
Appears in Collections:
SE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU