Synthesis and Optoelectrochemical Characterization of Imine-containing Polydithienylpyrroles

• Main Authors: LI, YEN-CHEN, 李晏辰
• Other Authors: WU, TZI-YI
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/x835kr

碩士 === 國立雲林科技大學 === 化學工程與材料工程系 === 106 === Three polydithienylpyrroles with diethylaminobenzal, 3,5-bis(trifluoromethyl)benzal, and pyrimidine pendants through the imine group linked to the dithienylpyrrole group were synthesized electrochemically, which were denominated as PDTPDE, PDTPBF and PDTPPM, respectively. A cathodically coloring material PPheDOT was also synthesized. The optical and electrochemical properties of three anodically coloring materials (PDTPDE, PDTPBF and PDTPPM) and a cathodically coloring material (PPheDOT), such as optical contrast, color variations, optical stability, coloration efficiency, electrochemical stability, and optical memory properties were characterized. The maximum optical contrast of PDTPBF film was 48.7 % at 1150 nm in an ionic liquid solution, and the color switched from yellow (-0.2 V) to dark blue (1.2 V). Electrochromic devices (ECD) based on PDTPDE, PDTPBF, and PDTPPM as anodic polymers and PProDOT-Et2, PProDOT-DB, and PPheDOT as cathodic polymers were constructed. PDTPPM/PProDOT-DB ECD showed the highest optical contrast (57.3 %), the highest coloration efficiency (387.83 cm2/C) at 590 nm and the color changed from light yellow (-0.6 V) to dark blue (1.0 V). PPheDOT-based ECDs showed higher electrochemical cycling stability than those of PProDOT-Et2- and PProDOT-DB-based ECDs, 85% of electroactivity was retained after 1000 cycles for PPheDOT-based ECDs. The results demonstrated that the ECDs consisted of both anode and cathode not only increased the color complementarity, but also increased the optical contrast and stability, and shortened the switching time.