Substituent and heteroatom effects on the electrochromic properties of similar systems

Abstract

Electrochromic polymers called poly(3,4‐dihydro‐3,3‐bis ((naphthalen‐1‐yl)methyl)‐2H‐thieno[3,4‐b][1,4]dioxepine) (PProDOT‐Np2), poly(3,3‐dibenzyl‐3,4‐dihydro‐2H‐selenopheno[3,4‐b][1,4]dioxepine), and poly(3,3‐dibenzyl‐3,4‐dihydro‐2H‐thieno[3,4‐b][1,4]dioxepine) were synthesized electrochemically and the effect of substituents and heteroatoms on the electrochromic properties were investigated for the similar systems. All polymers show electrochromism from a colored state when neutralized to transmissive when oxidized. Although, increasing bulky size (PProDOT‐Np2) causes lower coloration efficiency (CE) as well as lower optical contrast, the replacement of S atom by Se atom resulted in a lower band gap polymer with a higher CE than its thiophene analog. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

A platform to synthesize a soluble poly(3,4‐ethylenedioxythiophene) analogue

“…S9, Supporting Information]. Due to this narrow absorption band, the absorbance between 400 and 500 nm become lower and the PEDOT‐POSS film exhibited nearly a pure blue color, which is one of the legs in RGB color pallet. This promising property combined with its solubility in common organic solvent (chloroform, dichloromethane, tetrahydrofuran, etc.)…”

“…By the help of these gaps it will be easier to enter counter ions in the polymer structure . Therefore, when compared to the PEDOT, it will be possible to get the PEDOT‐POSS polymer with higher optical contrast and coloration efficiency as well as shorter switching time since ion injection into the polymer structure will be much easier during doping process …”

Easy‐to‐make carboxylic acid dioxythiophene monomer (ProDOT‐COOH) and functional conductive polymers

“…It is well known that EDOT scaffold are considered more difficult to modify than the ProDOT ones while the polymers present similar properties and the monomers can be also copolymerized . In this work, we present the synthesis of a new functional ProDOT carboxylic acid (ProDOT‐COOH) molecule which can be carried out in just two steps using commercially available reagents.…”

Bio-Based Aromatic Copolyesters: Influence of Chemical Microstructures on Thermal and Crystalline Properties

“…Functional groups on the main chains or side chains are critical for thermal stability. For example, heteroatoms (N, O, S) can easily degraded under high temperature or in the presence of oxygen [19][20][21][22]. Ester, urethane or carbonate groups are also easily attacked by other chemicals in the reaction systems, and thus, cause the scission of polymer chains [23][24][25][26].…”