The Electrochemical Behavior in Aqueous Media of Conducting Polymers: II . The Insoluble Fractions Obtained on the Cu(II) Catalyzed Polymerization of (2,5‐Dibromo‐3‐Group IV Substituted) Thiophenes

Abstract

The chemical polymerization of (2,5-dibromo-3-substituted) thiophenes utilizing Cu(II)C12 as a copromoter yields an amorphous insoluble polymer fraction which exhibits a very high electronic conductivity varying between 10 -1 to 102 S-cm. These materials have been used as electrode materials. The redox chemistry of the Cu(II) containing polymer in contact with supporting electrolyte only shows a distinct internal (Cu(II)/Cu(I) cyclic voltammetric wave. No redox behavior for the thiophene ring system is observed. This material is very stable in aqueous media and appears to be conducting at positive and negative electrode potentials (contrary to the redox response of electrodeposited poly-(thienylene) films. The lack of three-substituent steric effects is discussed. The similarities and, more important, the dissimilarities of the properties of these polymers and Cu(II)-dithiolate complexes are also discussed.

Color-Tuned Highly Fluorescent Organic Nanowires/Nanofabrics: Easy Massive Fabrication and Molecular Structural Origin

“…34 The high hydrophobicity of the color-tuned 2D-NF surfaces is highly advantageous in their practical applications because π-electronic molecules, and the performance of devices based on such molecules, are influenced significantly by environmental exposure to moisture, which generally causes chemical degradation and a sharp decrease in physical stability. 35,36 Another noteworthy feature is that, when we adopted a modified soft deposition technique, 37 a thicker fabric consisting of multiple layers of different kinds of 2D-NFs could be obtained. Such heterogeneous multilayered 2D-NFs are known to be difficult to fabricate, in cases of general multilayer films or assemblies of π-electron molecules, by solution processes such as drop-casting and spin-coating techniques.…”

Preparation of an EDOT-based polymer: optoelectronic properties and electrochromic device application

“…The crude mixture was chilled in the refrigerator overnight, and the precipitate product was ltered out. A white solid was obtained aer recrystallization of the crude product from diethyl ether to yield 9.26 g (65%) of (4). In a 100 mL round-bottomed ask, diethyl-3,4-dihydroxythiophene-2,5-dicarboxylate (2) (0.75 g, 2.9 mmol) was dissolved in 15 mL anhydrous DMF under inert (nitrogen) atmosphere.…”

“…They are also termed as synthetic metals or intrinsically electroactive conjugated polymers. [1][2][3][4][5] The discovery of the high electrical conductivity in doped polyacetylene has stimulated an enormous amount of work towards the elucidation of the electronic properties of conjugated organic polymers. [6][7][8][9][10] Further studies revealed that they have appreciably fast charge-discharge kinetics, suitable morphology and fast doping-undoping processes.…”

“…5 5,thieno[3,4-b][1,4]dioxocine-1,3dicarboxylic acid(5). Diethyl-5,10-dihydrobenzo[f]thieno[3,4-b] [1,4]dioxocine-1,3-dicarboxylate (4) (1.00 g, 2.8 mmol) and 15 mL ethanol were put into a round bottomed ask tted with a reux condenser.…”

Aggregation of Bu4NClO4 electrolyte in the presence of dicyclohexano-18-crown-6 in poly(3-methylthiophene) conducting polymer film electrodes. Unusual transient current phenomena

“…Experimental conditions and instrumentation have been described. 5 Figure 1 shows typical cyclic voltammograms (CVs) of the poly(3-methylthiophene) conducting polymer electrode in the solution studied. In the presence of DC-18C-6 significant transient 'up and down noise-like fluctuations' in the CVs occur, which, to our knowledge, have never been noticed and reported in the literature.…”