Electrochromic material containing unsymmetrical substituted N,N,N′,N′‐tetraaryl‐1,4‐phenylenediamine: Synthesis and their optical, electrochemical, and electrochromic properties

Abstract

A novel dibromo compound containing unsymmetrical substituted bi‐triarylamine was synthesized. A conjugated polymer was prepared via the Suzuki coupling from the newly prepared dibromo compound and 9,9‐dioctylfluorene‐2,7‐bis(trimethyleneboronate). The glass transition temperature (Tg) of the conjugated polymer was 140 °C, 10% weight‐loss temperatures (Td10) in nitrogen was 458 °C, and char yield at 800 °C in nitrogen higher than 64%. Cyclic voltammogram of the polymer film cast onto an indium‐tin oxide (ITO)‐coated glass substrate exhibited two reversible oxidation redox couples at 0.70 and 1.10 V versus Ag/Ag+ in acetonitrile solution. The polymer films revealed excellent stability of electrochromic characteristics, with a color change from yellow green of the neutral form to the dark green and blue of oxidized forms at applied potentials ranging from 0 to 1.3 V. The color switching time and bleaching time were 4.25 and 7.22 s for 860 nm and 5.51 s and 6.48 s for 560 nm. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1469–1476, 2010

Synthesis of polyimides containing triphenylamine‐substituted triazole moieties for polymer memory applications

“…The solubilities of the prepared polyimides are summarized in Table 2. The solubility behavior of polyimides depends on their chain packing abilities and intermolecular interactions, which in turn are influenced by the rigidity, symmetry, and regularity of the polymer backbone 24–30. Most of the polyimides showed poor solubility due to the pressure of rigid triazole moiety in the main chain 15.…”

Primary‐Colored Electrochromism of 1,4‐Phenylenediamines

“…[41][42][43] Particularly,i nt erms of EC characteristics, polymersc ontaining PDs and/or their derivatives have been shown to exhibit excellent continuous cyclic stability. [44][45][46][47][48] To our knowledge, however, ad etailed study on the electrochromism of as eries of PDs in their natural form has not yet been described. As such, the present study was initiated to analyze ten easily accessible 1,4phenylenediamines( PPDs) (Scheme 1) and discuss their voltammetry,e lectrolysis, UV/Vis spectroscopy,a nd EC properties in solution.…”

Synthesis and computational oxidation mechanism study of novel organosoluble aramids with high modulus by low‐temperature solution polycondensation

“…The oxidation peaks of M1 and Ref (P1 ) were not same with the oxidation peaks of polyamide 6b , indicating that the oxidations were not only resulting from the electron removal of nitrogen atoms. Many previous literatures proposed the triarylamine polymer oxidation mechanism 27, 29. They supposed the first electron was removed from the nitrogen atom with larger electron density, whereas the second electron was removed from the other nitrogen atom, which is close to atomic orbital opinion.…”