Novel synthesis, spectroelectrochemical, electrochemical and chronovoltabsorptometric characterization of poly(isothianaphthene)

Chandrasekhar, Prasanna; Masulaitis, Anthony M.; Gumbs, Ronald W.

doi:10.1016/0379-6779(90)90256-k

Cited by 79 publications

(24 citation statements)

References 33 publications

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“…2 The band-gap of the film was shown to be about 1.0-1,1 eV. 1 - 3 Unfortunately la is not particularly soluble, 4 does not melt below its decomposition temperature and so can not easily be processed.…”

mentioning

confidence: 99%

Poly(2,3-dihexylthieno[3,4-b]pyrazine). A new processable low band-gap polyheterocycle

Pomerantz¹,

Chaloner‐Gill

Harding

et al. 1992

J. Chem. Soc., Chem. Commun.

103

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mentioning

confidence: 99%

Poly(2,3-dihexylthieno[3,4-b]pyrazine). A new processable low band-gap polyheterocycle

Pomerantz¹,

Chaloner‐Gill

Harding

et al. 1992

J. Chem. Soc., Chem. Commun.

103

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“…Of the copolymers, that with Cl‐Bz‐ProDOT, Br‐Bz‐ProDOT, and Bz‐ProDOT as comonomers was found to yield the best electrochromic performance, superior to that of the individual‐monomer CPs. Additionally, to serve as a reference (control) cathodically coloring CP, to demonstrate the poor electrochemical and electrochromic matching with the anodically coloring CP used), PITN was also prepared according to literature procedures …”

Section: Resultsmentioning

confidence: 99%

“…A clear indicator of whether or not a dual‐polymer system is well matched is seen in the properties of the cyclic voltammogram (CV) of a 2‐electrode dual‐polymer electrochromic device. To illustrate this, we fabricated a dual‐polymer lens having our “standard” CP (copolymer of N,N ′‐diphenyl benzidine, diphenyl amine, and 4‐amino biphenyl) as the anodically coloring CP and PITN, one of the first cathodically coloring CPs discovered, and useful comparative benchmark, as the cathodically coloring polymer. The CV of the PITN/Poly(aromatic amine) system is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Matched‐dual‐polymer electrochromic lenses, using new cathodically coloring conducting polymers, with exceptional performance and incorporated into automated sunglasses

Chandrasekhar

Zay

Cai

et al. 2014

J of Applied Polymer Sci

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Reported are syntheses of several new monomer precursors of cathodically coloring conducting polymers (CPs), based on a propylene dioxythiophene skeleton. These are shown to yield CPs—both as homopolymers and as copolymers—that are nearly “perfectly” matched electrochemically and electrochromically with a set of anodically coloring poly(aromatic amines), for use in dual‐polymer electrochromic lenses. Resulting dual‐polymer electrochromic lenses display very high light/dark contrast (typically up to 70/7% or 50/0.5% Transmission (integrated over visible spectrum, vs. air reference), Haze < 2%, very high cyclability (> 10 K cycles), multiyear shelf life, appealing transparent to dark‐blue‐black transition, and excellent optical memory. Dramatic lowering of switching time, from 8 to < 1 s, is demonstrated using unique applied‐potential algorithm resident on inexpensive Microcontroller chip. Working, practical dual‐polymer electrochromic spectacles are demonstrated with electrochromic lenses retrofitted to spectacles meeting ANSI Z87.1, GL‐PD 10–12 (U.S. military) specifications. These incorporate photosensor, rechargeable Li battery, Microcontroller, allow for automated operation. Ab‐initio‐design spectacles, also conforming to above specifications, are also demonstrated, with components seamlessly hidden within frame. To the best of our knowledge, the electrochromic lenses and sunglasses reported herein represent the best visible‐region electrochromic performance for dual‐polymer CP electrochromic systems to date and the first practical implementation in working sunglasses. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41043.

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“…Conducting polymers also undergo chemical and physical changes in response to electrical stimuli. Ion exchange capacity,10 conductivity,11 optical properties,12–15 and another interesting applications16–20 all change in response to the imposition of appropriate electrical potentials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the properties of conductive hydrogel composite containing Zn particles

Golikand

Didehban

Rahimi

2012

J of Applied Polymer Sci

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In this work, the conductive hydrogel composites containing Zn particle synthesized and their electrical and thermal properties were investigated. Polyacrylamide/Zn composites were synthesized by free radical polymerization in aqueous solution. The effect of preparation conditions such as the influence of crosslinker amount, initiator amount, Zn amount, and water absorbency on electrical conductivity of hydrogel was investigated. The effect of preparation conditions on thermal properties has been characterized using thermogravimetric analysis (TGA) method. The structures of metal-composites were evaluated by FTIR and scanning electron microscopy (SEM) methods. SEM revealed a more uniform pore size when Zn particles were used when compared with pure polyacrylamide. TGA curves showed that both hydrogels were stable upto 600 C. The Zn/polyacrylamide hydrogels have a good conductivity of 4.30 mS cm À1 .

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Novel synthesis, spectroelectrochemical, electrochemical and chronovoltabsorptometric characterization of poly(isothianaphthene)

Cited by 79 publications

References 33 publications

Poly(2,3-dihexylthieno[3,4-b]pyrazine). A new processable low band-gap polyheterocycle

Poly(2,3-dihexylthieno[3,4-b]pyrazine). A new processable low band-gap polyheterocycle

Matched‐dual‐polymer electrochromic lenses, using new cathodically coloring conducting polymers, with exceptional performance and incorporated into automated sunglasses

Investigation of the properties of conductive hydrogel composite containing Zn particles

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