Two New Bithiophenes Derivatives Multielectrochromic Copolymer Based on Triphenylamine Unit and Their Application for Electrochromic Devices

Abstract

Two monomers including 4,4′,4″‐tris(3‐methoxythiophene‐2‐yl)triphenylamine (M1) and 4,4′,4″‐tris(3,4‐dimethoxythiophene‐2‐yl)triphenylamine (M2) with triphenylamine as their core were synthesized and the corresponding polymers were obtained by electrochemical polymerization. Their electrochemical properties were investigated using scanning electron microscopy, UV–Vis, and cyclic voltammetry. It was found that the two polymers had reversible redox behavior with the different color change under the applied potentials. Both the polymers displayed high switching efficiency and optical contrast. Moreover, the corresponding electrochromic devices (ECDs) employing the synthesized polymers and poly(3,4‐ethylenedioxythiophene) were constructed. The spectroelectrochemical experiments illustrated that the ECDs exhibited fast response time, reasonable optical contrast, favorable optical memories, and redox stability.

An Efficient Electrochromic Supercapacitor Based on Solution‐Processable Nanoporous Poly{tris[4‐(3,4‐ethylenedioxythiophene)phenyl]amine}

“…[16][17][18][19][20][21][22][23] In addition, al arge number of TPA-based polymers exhibit electrochromic behaviord uring redoxp rocesses that have potential applications in ECDs. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] To improve the charge carriert ransport properties and structural stabilities of polymerc hains, somet hiophene derivatives, such as 2,2'-bithiophene and 3,4-ethylenedioxythiophene (EDOT), have been incorporated within the polymer backbonea s" bridge" linkages. As eries of monomers that consist of aT PA core substituted by thiophene derivatives was synthesized recently,a nd the resulting polymers possess good electrochemical stabilitya nd variouse lectrochromic properties.…”

“…As eries of monomers that consist of aT PA core substituted by thiophene derivatives was synthesized recently,a nd the resulting polymers possess good electrochemical stabilitya nd variouse lectrochromic properties. [31][32][33][34][35][36] One of these reported monomers is tris [4-(3,4-ethylenedioxythiophene)phenyl]amine (TEPA), which was synthesized by the Stille cross-coupling reaction. [31,37] Chahma et al [37] and Idzik et al [38] prepared poly-{tris [4-(3,4-ethylenedioxythiophene)phenyl]amine} (PTEPA) films by electrochemical polymerization andf ound that they have significant electroactivity and reasonable redox stability,a lthought hese films are insoluble in all common solvents.…”

“…Among these reported conjugated polymers, many polymers based on triphenylamine (TPA), which have ultrafast electron‐transfer rate constants and good hole‐transporting abilities, have been studied intensively as electrode materials for organic batteries and SCs . In addition, a large number of TPA‐based polymers exhibit electrochromic behavior during redox processes that have potential applications in ECDs . To improve the charge carrier transport properties and structural stabilities of polymer chains, some thiophene derivatives, such as 2,2′‐bithiophene and 3,4‐ethylenedioxythiophene (EDOT), have been incorporated within the polymer backbone as “bridge” linkages.…”

“…To improve the charge carrier transport properties and structural stabilities of polymer chains, some thiophene derivatives, such as 2,2′‐bithiophene and 3,4‐ethylenedioxythiophene (EDOT), have been incorporated within the polymer backbone as “bridge” linkages. A series of monomers that consist of a TPA core substituted by thiophene derivatives was synthesized recently, and the resulting polymers possess good electrochemical stability and various electrochromic properties . One of these reported monomers is tris[4‐(3,4‐ethylenedioxythiophene)phenyl]amine (TEPA), which was synthesized by the Stille cross‐coupling reaction .…”

Cover Feature: An Efficient Electrochromic Supercapacitor Based on Solution‐Processable Nanoporous Poly{tris[4‐(3,4‐ethylenedioxythiophene)phenyl]amine} (ChemSusChem 15/2020)

“…[16][17][18][19][20][21][22][23] In addition, a large number of TPA-based polymers also exhibit electrochromic behavior during redox processes that have potential applications in ECDs. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] In order to improve the charge carrier transport properties and structural stabilities of polymer chains, some thiophene derivatives, such as 2,2'-bithiophene and 3,4-ethylenedioxythiophene (EDOT), have been incorporated within the polymer backbone as "bridge" linkages. A series of monomers consisting of a TPA core substituted by thiophene derivatives were synthesized recently, and the resulting polymers possess good electrochemical stability and various electrochromic properties.…”