Tetra(4-pyridyl) porphyrin (TPyP) was prepared by reflux of propionic acid,and water-soluble quaternary pyridinium porphyrin (TEPyP4+-Br) was synthesized by quaternization of TPyP.The electrochromic devices of TPyP and TEPyP4+-Br were prepared by integrated process.The structures of the compounds were characterized by 1H-NMR,FT-IR and UV-Vis.Density functional theory (DFT) calculations and cyclic voltammetry (CV) were used to reveal the electronic structure and electrochemical properties of the compounds.The electrochromic properties of the devices were characterized by in situ spectroscopy and chronoamperometry (CA).The results showed that the device of TEPyP4+-Br could undergo reversible color change (emerald green/dark green),and the current density after 100 cycles was 84%,which was greatly improved compared with that of the unquaternized TPyP (34%),indicating that quaternization was effective in regulating the cycle stability.
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基金资助
中央高校基本科研业务费专项资金(2232021G-12);国家自然科学基金(52273316);中央高校基本科研业务费专项资金(2232020A-03);中央高校基本科研业务费专项资金(2232021G-02)
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