Poly(3,4-ethylenedioxythiophene)

Poly(3,4-ethylenedioxythiophene) (PEDOT or PEDT; IUPAC name poly(2,3-dihydrothieno[3,4-b][1,4]dioxane-5,7-diyl)) is a conducting polymer based on 3,4-ethylenedioxythiophene or EDOT. It was reported in 1991.[1]

"PEDOT" redirects here. For the CMX album, see Pedot.
PEDOT

Polymer

Advantages of this polymer are optical transparency in its conducting state, high stability and moderate band gap and low redox potential. A large disadvantage is poor solubility, which is partly circumvented in the PEDOT:PSS composite, and the PEDOT-TMA material. Applications of PEDOT include electrochromic displays, antistatics, photovoltaics, electroluminescent displays, printed wiring, and sensors.[2][3]

The polymer is generated by oxidation. This process begins with production of the radical cation of EDOT monomer, [C2H4O2C4H2S]+. This cation attacks a neutral EDOT followed by deprotonation. The idealized conversion using peroxydisulfate is shown

n C2H4O2C4H2S + n (OSO3)22− → [C2H4O2C4S]n + 2n HOSO3−

For commercial purposes, the polymerization is conducted in the presence of polystyrene sulfonate (PSS).[3] The resulting composites, PEDOT coatings are deposited on a conductive support (platinum, gold, glassy carbon, indium tin oxide, etc.) in organic solvents or in aqueous suspensions.

Uses

Pedot has been proposed for use in biocompatible interfaces.[4][5]

Further reading
  • Bello, A; Giannetto, M; Mori, G; Seeber, R; Terzi, F; Zanardi, C (2007). "Optimization of the DPV potential waveform for determination of ascorbic acid on PEDOT-modified electrodes". Sensors and Actuators B: Chemical. 121 (2): 430. doi:10.1016/j.snb.2006.04.066. hdl:11380/621556.
  • Kumar, S. Senthil; Mathiyarasu, J.; Phani, K. L. N.; Yegnaraman, V. (2005). "Simultaneous determination of dopamine and ascorbic acid on poly (3,4-ethylenedioxythiophene) modified glassy carbon electrode". Journal of Solid State Electrochemistry. 10 (11): 905. doi:10.1007/s10008-005-0041-7.</ref>
  • Zhang, Xinyu; MacDiarmid, Alan G.; Manohar, Sanjeev K. (2005). "Chemical synthesis of PEDOT nanofibers". Chemical Communications (42): 5328–30. doi:10.1039/b511290g. PMID 16244744.</ref>
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References
  1. F. Jonas, L. Schrader. "Conductive Modifications of Polymers with Polypyrroles and Polythiophenes". Synthetic Metals. 41: 831–836. doi:10.1016/0379-6779(91)91506-6.CS1 maint: uses authors parameter (link)
  2. Groenendaal, L. B.; Jonas, F.; Freitag, D.; Pielartzik, H.; Reynolds, J. R. (2000). "Poly(3,4-Ethylenedioxythiophene) and Its Derivatives: Past, Present, and Future". Adv. Mater. 12: 481–494. doi:10.1002/(SICI)1521-4095(200004)12:7<481::AID-ADMA481>3.0.CO;2-C.CS1 maint: uses authors parameter (link)
  3. Kirchmeyer, S.; Reuter, K. (2005). "Scientific Importance, Properties and Growing Applications of Poly(3,4-Ethylenedioxythiophene)". J. Mater. Chem. 15: 2077–2088. doi:10.1039/b417803n.CS1 maint: uses authors parameter (link)
  4. Donahue, Mary J.; Sanchez-Sanchez, Ana; Inal, Sahika; Qu, Jing; Owens, Roisin M.; Mecerreyes, David; Malliaras, George G.; Martin, David C. (1 April 2020). "Tailoring PEDOT properties for applications in bioelectronics". Materials Science and Engineering: R: Reports. 140: 100546. doi:10.1016/j.mser.2020.100546. ISSN 0927-796X.
  5. Cuthbertson, Anthony (17 August 2020). "Material found by scientists 'could merge AI with human brain'". The Independent.
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