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Polymers 2017, 9(12), 656; https://doi.org/10.3390/polym9120656

The Availability of Neutral Cyan, Green, Blue and Purple Colors from Simple D–A Type Polymers with Commercially Available Thiophene Derivatives as the Donor Units

1
Dongchang College, Liaocheng University, Liaocheng 252059, China
2
Department of Chemistry, Liaocheng University, Liaocheng 252059, China
3
Liaocheng People’s Hospital, Liaocheng 252000, China
4
College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
*
Authors to whom correspondence should be addressed.
Received: 26 October 2017 / Revised: 19 November 2017 / Accepted: 24 November 2017 / Published: 29 November 2017
(This article belongs to the Special Issue Polymeric Materials for Optical Applications)
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Abstract

In this paper, the Stille coupling reaction was used to prepare four donor–acceptor–donor (D–A–D) type monomers. For this purpose, 2,3-bis(4-methoxyphenyl) quinoxaline was used as the acceptor unit, and thiophene derivatives (3,4-ethylenedioxythiophene, or EDOT; 3-methoxythiophene, or MOTh; 3-methylthiophene, or MTh; and thiophene, or Th) were used as the donor units. The monomers were polymerized to the corresponding polymers by the cyclic voltammetry (CV) or potentiostatic method. The band gaps and the adsorption profiles of the polymers were finely tuned with the incorporation of the different thiophene units. All four polymers have low band gaps, and switched between the colored neutral states and the highly transmissive oxidized state. We were successfully able to obtain the valuable neutral colors of cyan, green, blue, and violet for the polymers employing EDOT, MOTh, MTh, and Th as the donor unit, respectively. Furthermore, electrochromic kinetic investigations showed that all four polymers displayed excellent optical contrasts (ΔT%), fast switching times, high coloration efficiencies, and robust stabilities, indicating that these four polymers are probably promising choices for developing electrochromic devices. View Full-Text
Keywords: quinoxaline; thiophene derivatives; donor-acceptor polymers; electrochromic; spectroelectrochemistry quinoxaline; thiophene derivatives; donor-acceptor polymers; electrochromic; spectroelectrochemistry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kong, L.; Wang, M.; Ju, X.; Zhao, J.; Zhang, Y.; Xie, Y. The Availability of Neutral Cyan, Green, Blue and Purple Colors from Simple D–A Type Polymers with Commercially Available Thiophene Derivatives as the Donor Units. Polymers 2017, 9, 656.

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