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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
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Solid-solid phase interconversion in an organic conductor crystal: hydrogen-bond-mediated dynamic changes in
Junya Yoshida1, Akira Ueda, Akiko Nakao
1The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 2778581, Japan. a-ueda@issp.u-tokyo.ac.jp hmori@issp.u-tokyo.ac.jp.
Chemical Communications (Cambridge, England)
|October 31, 2014
Summary
A novel solid-state phase transition was discovered in hydrogen-bonded (H-bonded) tetrathiafulvalene (TTF) organic conductors. This transition involves dynamic changes in molecular arrangement and physical properties due to H-bond transformations.
Area of Science:
- Materials Science
- Organic Electronics
- Crystallography
Background:
- Organic conductors are crucial for electronic applications.
- Hydrogen bonding plays a key role in molecular self-assembly and material properties.
- Tetrathiafulvalene (TTF) derivatives are widely studied organic semiconductors.
Purpose of the Study:
- To investigate solid-solid phase interconversion in H-bonded TTF organic conductors.
- To understand the relationship between molecular structure, H-bonding, and physical properties.
- To explore dynamic changes in π-stacked arrangements during phase transitions.
Main Methods:
- Synthesis of a novel H-bonded TTF molecular unit.
- Crystallographic analysis to determine molecular structures.
- Physical property measurements (e.g., conductivity) under varying conditions.
- Spectroscopic techniques to monitor H-bond transformations.
Main Results:
- Observed a reversible solid-solid phase interconversion.
- Identified dynamic transformation of the H-bond unit between planar and bent forms.
- Correlated H-bond changes with alterations in π-stacked molecular arrangement.
- Demonstrated significant changes in physical properties linked to the phase transition.
Conclusions:
- H-bonded TTF systems can exhibit unique solid-state phase transitions.
- The dynamic nature of H-bonds is a key factor in controlling molecular arrangement and properties.
- This finding opens new avenues for designing responsive organic electronic materials.
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