Synthesis,electrochemical and electrochromic properties of novel 2,4,6-Tri(pyridine-4-yl)pyridilium derivatives |
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| Affiliation: | 1. CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, PR China;2. School of Chemistry and Materials Science, Nanjing Normal University, Xianlin Campus, Wenyuan Road 1, Nanjing 210023, PR China;1. Turku University Centre for Materials and Surfaces (MATSURF), Laboratory of Materials Chemistry and Chemical Analysis, FI-20014, University of Turku, Finland;2. University of Turku Graduate School (UTUGS), FI-20014, Turku, Finland;1. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China;2. Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China;3. Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, PR China |
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| Abstract: | Four star-shaped like fused heterocyclic compounds multi-electrochromic materials 2,4,6-Tri(pyridine-4-yl)pyridilium derivatives (TPPDs) were successfully synthesized and characterized by NMR, Solid IR spectra, APCI-MS, and UV–vis spectroscopy. The electrochemical properties, electrochromic behavior, electro-optical properties, and electrochromic mechanism were investigated by thermogravimetric analysis, cyclic voltammetry and UV–vis absorption spectra. Electrochromic devices based on these compounds were fabricated with an active area of 3 cm × 4 cm and their electrochromic performances were further studied. It was found the ECDs presented a stable as well as multicolor electrochromic change from colorless to blue, then violet-blue and finally black-blue between 0 V and +4.0 V. In addition, the prepared electrochromic materials had high coloration efficiency, low switching time, and nice redox stability. This type of multi-electrochromic materials would thus be promising candidates for applications in electrochromic devices. |
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| Keywords: | Multi-electrochromic materials 2,4,6-Tri(pyridine-4-yl)pyridilium derivatives Cyclic voltammetry Electrochromic devices Multicolor |
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