Multi-color electrochromism from coordination nanosheets based on a terpyridine-Fe(ii) complex.
Yu Kuai1, Weijun Li, Yujie Dong
1State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China. dongyujie@zjut.edu.cn czhang@zjut.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|September 28, 2019
Summary
A novel metal complex nanosheet was created using liquid-liquid interface self-assembly. This material displays vibrant electrochromism and excellent stability, showing promise for future electrochromic devices.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Metal complexes are investigated for their unique electronic and optical properties.
- Electrochromic materials change color upon application of a voltage, with applications in smart windows and displays.
- Developing stable and efficient electrochromic materials remains a key challenge.
Purpose of the Study:
- To synthesize a metal complex nanosheet using a liquid-liquid interface self-assembly method.
- To investigate the electrochromic properties and stability of the synthesized nanosheet.
- To evaluate the potential of this method for creating polymeric metal complexes for electrochromic applications.
Main Methods:
- Synthesis of a metal complex nanosheet via liquid-liquid interface self-assembly using a star-shaped ligand (tris[4-(4'-2,2':6',2''-terpyridyl)-phenyl]amine) and Fe(ii) ions.
- Characterization of the nanosheet morphology and thickness.
- Electrochemical and electrochromic measurements on the nanosheet adhered to an ITO glass.
Main Results:
- The synthesized nanosheet exhibited a smooth morphology with a thickness of hundreds of nanometers.
- Noticeable electrochromism was observed, transitioning from purplish red at 0 V to orange-yellow at 1.4 V and green at 1.6 V.
- The nanosheet demonstrated outstanding stability, retaining nearly 100% of its electrochemical activity over 500 cycles.
Conclusions:
- The liquid-liquid interface self-assembly method is a promising technique for preparing polymeric metal complexes.
- The synthesized metal complex nanosheet shows significant potential for electrochromic applications due to its stability and color-changing properties.
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