A new low bandgap hybrid polymer film obtained by electropolymerization of 3,4-ethylenedioxythiophene with bis(1,3-dithiole-2-thione-4,5-dithiolate)platinate(II) dianion, PEDOT/[Pt(dmit)2]2−
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In this work, we report the electrochemical polymerization of novel low bandgap hybrid polymer films based on 3,4-ethylenedioxythiophene containing bis(1,3-dithiole-2-thione-4,5-dithiolate)platinate(II) dianions, PEDOT/[Pt(dmit)2]2− which were obtained under galvanostatic conditions using a synthesis charge (Qs) of 12.5 mC cm−2. Morphological studies of these films by SEM and AFM revealed a regular surface with volumetric roughness (RMS) of 141.8 nm as well as high homogeneity in its composition. FTIR studies depicted bands assigned to both polymer and counterions, confirming a strong interaction among the components. Cyclic voltammetry in a monomer free solution showed well-defined peaks and potentials similar to that of the free counterion, evincing that the electron transfer processes in the film are mainly ruled by the dmit-based counterion. Optoelectronics studies of hybrid films showed a strong absorption at 786 nm and a multicolor electrochromism (greenish yellow-deep green). The direct optical bandgap (E g), calculated from the absorption spectrum, was 1.42 eV, suggesting that the dmit-based dianion plays an important role on the optoelectronic properties of the hybrid polymer films.
Keywordspoly(3,4-ethylenedioxythiophene) PEDOT Conducting polymer Hybrid material bis(1,3-dithiole-2-thione-4,5-dithiolate) platinate(II) dmit Low bandgap
The author would like to dedicate this work to my friend Cassiano Pedro da Silva who passed away on December 12, 2016.
- 13.Elschner A, Kirchmeyer S, Lövenich W, Merker U, Reuter K (2011) Pedot: principles and applications of an intrinsically conductive polymer. CRC Press, Boca RatonGoogle Scholar
- 14.Bubnova O, Khan ZU, Wang H, Braun S, Evans DR, Fabretto M, Hojati-Talemi P, Dagnelund D, Arlin J-B, Geerts YH, Desbief S, Breiby DW, Andreasen JW, Lazzaroni R, Chen WM, Zozoulenko I, Fahlman M, Murphy PJ, Berggren M, Crispin X (2013) Semi-metallic polymers. Nat Mater 13:190–194CrossRefGoogle Scholar
- 23.Wang C, Batsanov AS, Bryce MR, Howard JAK (1998) An improved large-scale (90 g) synthesis of Bis(tetraethylammonium)bis(1,3-dithiole-2-thione-4,5-dithiol)zincate: synthesis and X-ray crystal structures of bicyclic and tricyclic 1,4-dithiocines derived from 1,3-dithiole-2-thione-4,5-dithiolate (DMIT). Synthesis 1998:1615–1618CrossRefGoogle Scholar
- 24.Abdulla HS (2013) Electrochemical synthesis and vibrational mode analysis of poly (3-methelthiophene). Int J Electrochem Sci 8:11782–11790Google Scholar
- 25.Karabozhikova VI, Tsakova VT (2017) Electroless deposition of silver on poly(3,4-ethylenedioxythiophene) obtained in the presence of polystyrene sulfonate or dodecyl sulfate ions—effect of polymer layer thickness. Bulg Chem Comm 49:37–43Google Scholar
- 35.Rocco AM, Pereira RP, Bonapace JAP, Comerlato NM, Wardell JL, Milne BF, Wardell SMSV (2004) A theoretical study of tetrabutylammonium [bis(1,3-dithiole-2-thione-4,5-dithiolato)bismuthate], [NBu4][Bi(dmit)2]: infrared spectrum in the solid state and solvation effects on the molecular geometry. Inorg Chim Acta 357:1047–1053CrossRefGoogle Scholar
- 37.Kulandaivalu S, Zainal Z (2015) A new approach for electrodeposition of poly (3, 4-ethylenedioxythiophene)/polyaniline (PEDOT/PANI) copolymer. Int J Electrochem Sci 10:8926–8940Google Scholar
- 39.Misra A, Kumar P, Srivastava R, Dhawan SK, Kamalasanan MN, Chandra S (2005) Electrochemical and optical studies of conjugated polymers for three primary colours. Indian J Pure Appl Phys 43:921–925Google Scholar
- 40.Chen J, Zhang J, Zou Y, X, W, Zhu D (2017) PPN (poly-peri-naphthalene) film as a narrow-bandgap organic thermoelectric material. J Mater Chem A 5:9891–9896Google Scholar
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