Soluble Alkyl Substituted Poly(3,4Propylenedioxyselenophne)s : a novel platform for Optoelectronic materials

Download

index.pdf

Date

2011

Author

Atak, Samed

Metadata

Show full item record

Item Usage Stats

22
views

22
downloads

In this study, optical and electrochemical properties of regioregular and soluble alkyl substituted propylenedioxyselenophene based electrochromic polymers, namely poly(3,3-dibutyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C4), poly(3,3-dihexyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C6), and poly(3,3-didecyl-3,4-dihydro-2H-selenopheno[3,4-b][1,4]dioxephine) (PProDOS-C10), which were synthesized via electrochemical polymerization, were investigated. It is noted that these unique polymers have low band gaps (1.54 – 1.64 eV) and they are exceptionally stable under ambient atmospheric conditions. For example, polymer films retained 84-96 % of their electroactivity after five thousands cycles. The percent transmittance of PProDOS-Cn (n= 4, 6, 10) films found to be between 55-59 %. Furthermore, these novel soluble PProDOS-Cn polymers showed electrochromic behavior: a color change form pure blue (L = 57.31, a = -13.18, b = - 42.68) to highly transparent state (L = 91.74, a = 2.52, b = -1.30) state in a low switching time (1.0 s) during oxidation with high coloration efficiencies (328 – 864 cm2/C) when compared to their close analogues.

Subject Keywords

Conjugated polymers., Organic conductors.

URI

http://etd.lib.metu.edu.tr/upload/12613106/index.pdf
https://hdl.handle.net/11511/20372

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Syntheses of benzotriazole bearing donor acceptor type random copolymers for full visible light absorption Öktem, Gözde; Toppare, Levent Kamil; Department of Chemistry (2011) The synthesis and preliminary optoelectronic properties of a series of donor-acceptor (DA) type polymers differing by the acceptor units in the polymer backbone were investigated. Polymers CoP1, CoP2 and CoP3 were designed to yield alternating DA segments with randomly distributed different acceptor units along polymer backbone. The combination of neutral state red colored and neutral state green colored materials resulted in different neutral state colors with respect to their additional acceptor unit. 5,8...
The effect of potassium hydroxide on the polymerization of trichlorophenol, pyrrole and thiophene by microwave initiation Güngör (Ünsal), Müfide Elif; Kısakürek, Duygu; Department of Chemistry (2008) The synthesis of black conducting polymer (CP) and/or crosslinked polymers (CLP) and/or radical ion polymer (RIP) and/or white polymers (WP) and/or orange polymer (OP) were achieved by using KOH with TCP, pyrrole and thiophene via microwave energy in a very short time interval. Polymerizations were carried out by constant microwave energy with different time intervals varying from 1 to 25 min; or at constant time intervals with variation of microwave energy from 90 to 900 watt; or varying the water content ...
Synthesis and electrochromic properties of a multichromic, conducting, soluble polythiophene derivative and its copolymer Özyurt, Funda; Toppare, Levent Kamil; Department of Chemistry (2009) A new polythiophene derivative, poly-2,3-bis(4-tert-butylphenyl)-5,8-bis(4-hexylthiophen-2-yl)quinoxaline PHTQ was synthesized by both chemical and electrochemical polymerization and its electrochemical properties were reported. The monomer was electrochemically polymerized in the presence of tetrabutylammonium hexafluorophosphate(TBAPF6) as the supporting electrolyte in dichloromethane-acetonitrile (5:95, v:v). Nuclear magnetic resonance spectroscopy (1H-NMR, 13C-NMR) was utilized for the characterization ...
Synthesis and characterization of multi-hollow opaque polymer pigments Asmaoğlu, Serdar; Gündüz, Güngör; Maviş, Bora; Department of Chemical Engineering (2012) In the present work, a new generation opaque polymer pigment with multihollow structure was synthesized by suspension polymerization of “Water-in-Oil-in-Water” (W/O/W) emulsion system. Oil phase was methyl methacrylate and ethylene glycol dimethacrylate monomer mixture at 1:1 weight ratio. The dimension and distribution of hollows inside polymer particles are dependent on the size of water droplets which are encapsulated in micelles. For Water-in-Oil (W/O) assembly, a hydrophobic surfactant and hydrophilic ...
Synthesis of conducting block copolymers and their use in the immobilization of invertase and polyphenol oxidase enzyme Kıralp, Senem; Kıralp, Senem; Department of Chemistry (2004) A new thiophene derivative containing menthyl group (MM) was synthesized and polymerized via chemical and electrochemical methods. Polymers obtained and MM itself were used to synthesize copolymers with pyrrole under conditions of constant potential electrolysis. Cyclic Voltammetry, thermal analysis and scanning electron microscopy analyses were performed for the characterization of samples. Immobilization of invertase and polyphenol oxidase enzymes was performed in the matrices obtained via copolymerizatio...

Citation Formats

S. Atak, “Soluble Alkyl Substituted Poly(3,4Propylenedioxyselenophne)s : a novel platform for Optoelectronic materials,” M.S. - Master of Science, Middle East Technical University, 2011.