Electrical Conductivity in Dimethyl Sulfoxide + Potassium Iodide Solutions at Different Concentrations and Temperatures

2014 ◽  
Vol 59 (8) ◽  
pp. 2360-2366 ◽  
Author(s):  
Iwona Płowaś ◽  
Jolanta Świergiel ◽  
Jan Jadżyn
Keyword(s):  
Electrical Conductivity ◽  
Dimethyl Sulfoxide ◽  
Potassium Iodide

Determination of Xanthates, Dithiocarbamates, and Some Fungicides by Titration with Electrogenerated Iodine in Anhydrous Acetonitrile

1983 ◽  
Vol 66 (3) ◽  
pp. 646-650
Author(s):  
Dale D Clyde
Keyword(s):  
Dimethyl Sulfoxide ◽  
Cross Section ◽  
Relative Error ◽  
Potassium Iodide ◽  
Anhydrous Acetonitrile ◽  
Platinum Electrodes ◽  
Cell Compartment ◽  
End Point ◽  
Relative Errors

Abstract Xanthates, dithiocarbamates, and the fungicides maneb and zineb were determined by titration with electrogenerated iodine in anhydrous acetonitrile. The electrolyte was potassium iodide. The generating electrode was a platinum spiral (2.5 cm diameter, 2 mm cross section). The enclosed cell compartment was continuously flushed with dry nitrogen, and sample solutions (0.20-0.40 mL) were introduced by syringe. With the aid of 2 platinum electrodes, the end point was indicated amperometrically. Ten minutes was required for each determination. The compounds were determined at ≥5 μequiv. with relative errors of 0.21-9%. Precision is 0.60-5.7%. Thiourea, sulfur, and urea did not interfere, but thioacetamide did. Solutions of maneb and zineb in dimethyl sulfoxide are stable enough that μequiv. amounts of each compound can be determined with a relative error of 7% or less.

scholarly journals The structure and conductivity of polyelectrolyte based on MEH-PPV and potassium iodide (KI) for dye-sensitized solar cells

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 1022-1027 ◽  
Author(s):  
Magdalena M. Szindler ◽  
Marek Szindler ◽  
Leszek A. Dobrzański
Keyword(s):  
Electrical Conductivity ◽  
Solar Cell ◽  
Potassium Iodide ◽  
Dye Sensitized Solar Cells ◽  
Liquid Electrolyte ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Cell Changes ◽  
Sensitized Solar Cells ◽  
Scanning Electron

AbstractThis article presents the results of a research on the effects and properties of the potassium iodide additive onto the structure of the MEH-PPV polymer material, in its aspect of application in the dye-sensitized solar cell. Changes in MEH-PPV surface morphology were researched through increasing of the potassium iodide content measured by scanning electron microscope. The increased content of potassium iodide also led to increased electrical conductivity measured by the Keithley meter. The electrical properties of the dye-sensitized solar cell were also studied, in which the liquid electrolyte was replaced with a thin layer of polyelectrolyte, based on MEH-PPV and potassium iodide.

scholarly journals Electrical Conductivities and Interactions in Binary Mixtures of Imidazolium-Based Ionic Liquids with Acetonitrile and Dimethyl Sulfoxide

2020 ◽  
Vol 71 (2) ◽  
pp. 392-402
Author(s):  
Oana Ciocirlan ◽  
Amalia Stefaniu
Keyword(s):  
Electrical Conductivity ◽  
Ionic Liquids ◽  
Dimethyl Sulfoxide ◽  
Binary Mixtures ◽  
Density Functional ◽  
Binary Systems ◽  
Density Functional Theory Calculations ◽  
Functional Theory ◽  
Electrical Conductivities ◽  
Anion Type

This paper reports experimental electrical conductivities data of eight binary systems of four ionic liquids: 1-butyl-3-methylimidazolium tetrafluoroborate, [Bmim][BF4], 1-hexyl-3-methylimidazolium tetrafluoroborate, [Hmim][BF4], 1-butyl-3-methylimidazolium hexafluorophosphate, [Bmim][PF6] and 1-butyl-2,3-dimethyl-imidazolium tetrafluoroborate, [Bmmim][BF4] with the organic solvents dimethyl sulfoxide (DMSO) and acetonitrile (ACN) at atmospheric pressure and temperatures from 298.15 to 328.15 K. It was found that conductivities in the investigated ionic liquids follow the order: [Bmim][BF4] ] [Bmim][PF6] ][Bmmim][BF4] ] [Hmim][BF4]. Experimental results demonstrate that the binary mixtures possess higher electrical conductivity compared with pure components. Electrical conductivity data were correlated using Casteel�Amis and Arrhenius equations. The molar conductivity was derived from experimental data and fitted to Walden rule. The influence of the cation structure and anion type on the conductivity was discussed, which help understanding the intermolecular interactions in the binary systems. A deeper understanding of the transport behavior of ILs is given by means of density functional theory calculations (DFT)

Electrical conductivity of solutions of copper(II) nitrate crystalohydrate in dimethyl sulfoxide

2016 ◽  
Vol 90 (6) ◽  
pp. 1265-1268
Author(s):  
Aigul K. Mamyrbekova ◽  
A. D. Mamitova ◽  
Aizhan K. Mamyrbekova
Keyword(s):  
Electrical Conductivity ◽  
Dimethyl Sulfoxide

scholarly journals Role of Doping Agent Degree of Sulfonation and Casting Solvent on the Electrical Conductivity and Morphology of PEDOT:SPAES Thin Films

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 658
Author(s):  
Daniela Valeria Tomasino ◽  
Mario Wolf ◽  
Hermes Farina ◽  
Gianluca Chiarello ◽  
Armin Feldhoff ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Dimethyl Sulfoxide ◽  
High Concentration ◽  
Doping Agent ◽  
Electrically Conducting ◽  
Conducting Materials ◽  
First Time

Poly(3,4-ethylenedioxythiophene) (PEDOT) plays a key role in the field of electrically conducting materials, despite its poor solubility and processability. Various molecules and polymers carrying sulfonic groups can be used to enhance PEDOT’s electrical conductivity. Among all, sulfonated polyarylether sulfone (SPAES), prepared via homogenous synthesis with controlled degree of sulfonation (DS), is a very promising PEDOT doping agent. In this work, PEDOT was synthesized via high-concentration solvent-based emulsion polymerization using 1% w/w of SPAES with different DS as dopant. It was found that the PEDOT:SPAESs obtained have improved solubility in the chosen reaction solvents, i.e., N, N-dimethylformamide, dimethylacetamide, dimethyl sulfoxide, and N-methyl-2-pyrrolidone and, for the first time, the role of doping agent, DS and polymerization solvents were investigated analyzing the electrical properties of SPAESs and PEDOT:SPAES samples and studying the different morphology of PEDOT-based thin films. High DS of SPAES, i.e., 2.4 meq R-SO3−× g−1 of polymer, proved crucial in enhancing PEDOT’s electrical conductivity. Furthermore, the DMSO capability to favor PEDOT and SPAES chains rearrangement and interaction results in the formation of a polymer film with more homogenous morphology and higher conductivity than the ones prepared from DMAc, DMF, and NMP.

Polymeric Electrolyte Thin Film for Dye Sensitized Solar Cells Application

2019 ◽  
Vol 293 ◽  
pp. 73-81
Author(s):  
Magdalena M. Szindler
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Solar Cells ◽  
Solar Cell ◽  
Active Layer ◽  
Potassium Iodide ◽  
Dye Sensitized Solar Cells ◽  
Liquid Electrolyte ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this paper, the possibility of replacing liquid electrolyte in a dye sensitized solar cells with a thin film of conductive polymer material was investigated. Liquid electrolyte in the construction of dye sensitized solar cells leaks and evaporates and leads to corrosion of the electrode, which lowers the conversion efficiency of solar radiation to electricity. The research focuses on the appropriate doping of the PVDF-HFP polymer by potassium iodide to improve its electrical conductivity and the development of thin film deposition technology for use in solar cells. Changes in PVDF-HFP surface morphology were researched through increasing of the potassium iodide content measured by scanning electron microscope. The increased content of potassium iodide also led to increased electrical conductivity measured by the Keithley meter. In order to test the suitability of developed materials for application in the construction of photovoltaic cells, a series of dye-sensitized solar cells ITO/TiO2/dye/active layer/Al were prepared. The active layer is made from pure PVDF-HFP and doped with potassium iodide. As a reference solar cell, a standard dye sensitized solar cell with a liquid electrolyte and a counter electrode was also made. Keywords PVDF-HFP; Polyelectrolyte; Dye-sensitized solar cells

Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/nylon 6 nanofiber web treated with repetitive coating cycles and dimethyl sulfoxide multi-step treatment for electronic textiles

2021 ◽  
pp. 004051752199981
Author(s):  
Sungeun Shin ◽  
Eugene Lee ◽  
Gilsoo Cho
Keyword(s):  
Electrical Conductivity ◽  
Dimethyl Sulfoxide ◽  
Sheet Resistance ◽  
Contact Area ◽  
Nylon 6 ◽  
Electronic Textiles ◽  
Chemical Structures ◽  
One Step ◽  
Nanofiber Web ◽  
The One

Highly conductive nylon 6 nanofiber web was fabricated with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and dimethyl sulfoxide (DMSO) for electronic textiles. To improve electrical conductivity, repeated coating with PEDOT:PSS and multi-step treatment of DMSO was performed. The effects of these treatments on electrical conductivity, surface properties, and chemical structures were investigated. For repetitive coating cycles, pristine PEDOT:PSS dispersion was dropped onto a nylon 6 nanofiber web for between one and four times of coating. For DMSO multi-step treatment, in the one-step treatment, the nanofiber web was repeatedly treated using PEDOT:PSS doped with DMSO. In the two-step treatment, the nanofiber web was repeatedly treated with doped PEDOT:PSS at first and, then, it was immersed in a DMSO bath. As a result, the sheet resistance decreased dramatically as the number of coating cycles increased. When the two-step treatment was applied, the sheet resistance was much lower compared to that of the one-step treatment, and thereby sample PD4-D with the lowest resistance showed 6.56 Ω/sq. As a result, the surface of the nanofiber web was covered with more PEDOT:PSS as the coating cycle was repeated. The PEDOT particles became large and long shapes after the two-step treatment of DMSO. This inferred that the contact area among conducting PEDOT particles increased because insulating PSS was removed by DMSO. In addition, the presence of PEDOT:PSS and nylon 6 was confirmed. This study proved that the simultaneous treatments of repeated coating with PEDOT:PSS and multi-step treatment of DMSO can improve electrical conductivity, and it developed the highly conductive PEDOT:PSS/nylon 6 nanofiber web.

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