Related Experiment Video
Updated: Jul 17, 2025
11:27
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
48.2K
Targeted regulation and optimization of multifunctional phase transition materials by novel void occupancy
Zhi-Jie Wang1, Hao-Fei Ni2, Tie Zhang1
1Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University Nanjing 211189 People's Republic of China dawei@seu.edu.cn.
Chemical Science
|September 1, 2023
Summary
Researchers engineered organic-inorganic hybrid phase transition materials by controlling lattice void occupancy. This fine-tuning successfully regulated phase transition temperature and bistable properties, offering a new pathway for advanced functional electronic equipment.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Organic-inorganic hybrid phase transition materials offer versatile structures and functions for electronic equipment.
- Challenges exist in precisely controlling electrical/optical responses and structure-performance relationships for long-term applications.
- Targeted regulation of phase transition temperature and bistability is crucial for advanced material design.
Purpose of the Study:
- To investigate the impact of lattice void occupancy on phase transition temperature (Tp) and optical/electrical bistability.
- To establish structure-property relationships in organic-inorganic hybrid materials.
- To demonstrate a method for customizing hybrid phase transition materials for specific functionalities.
Main Methods:
- Synthesis of novel hybrid materials ([DEDMA][Cd(SCN)3], [TEMA][Cd(SCN)3], [TEA][Cd(SCN)3]) based on a prototype ([TMEA][Cd(SCN)3]).
- Systematic investigation of lattice void occupancy effects.
- Characterization of phase transition temperature, dielectric, and nonlinear optical properties.
Main Results:
- Successful synthesis of three new hybrid materials with modulated physical properties via void occupancy engineering.
- [TEA][Cd(SCN)3] demonstrated significant bistable dielectric and nonlinear optical responses.
- Second-harmonic generation intensity in [TEA][Cd(SCN)3] reached 2.5 times that of KDP.
Conclusions:
- Lattice void occupancy is a key factor in regulating phase transition temperature and bistability in hybrid materials.
- Subtle engineering of void occupancy provides a feasible route to customize organic-inorganic hybrid phase transition materials.
- The developed materials show promise for applications in functional electronic equipment requiring tunable optical and electrical properties.
Related Concept Videos
02:33Phase Transitions: Sublimation and Deposition
17.2K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.2K
02:31Phase Transitions
19.2K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.2K
02:39Phase Transitions: Vaporization and Condensation
17.7K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.7K