Tutuncu, EsraVarlik, BengisuKesimal, BusraCihaner, AtillaOzkut, Merve IcliChemical Engineering2024-07-052024-07-0520200379-677910.1016/j.synthmet.2020.1163702-s2.0-85084541280https://doi.org/10.1016/j.synthmet.2020.116370https://hdl.handle.net/20.500.14411/3081Kesimal, Busra/0000-0002-9467-6786An electrochromic polymer, namely "poly(2,6-(3,3-didecyl-3,4-dihydro-2H-thieno [3,4-b] [1,4]dioxepin-6-yl)-4,4-dioctyl-4H-cyclopenta[2,1-b;3,4-b']dithiophene)" (P1), was electrochemically synthesized successfully, and its electrochemical and optical properties were investigated. The band gap of the polymer P1 was calculated as 1.77 eV with -5.45 eV Highest Occupied Molecular Orbital (HOMO) and -3.68 eV Lowest Unoccupied Molecular Orbital (LUMO) energy levels. The polymer P1 is bluish purple when neutralized and highly transparent greenish purple when oxidized. This color change was observed around 1.4 s between its redox states and optical contrast ratio was found to be as 49 % and 53 % with 234 cm(2)/C and 239 cm(2)/C coloration efficiencies at 590 nm and 634 nm, respectively. Moreover, the properties of this polymer were compared to its analogues and also during this comparison the effect of alteration of a single atom in the pendant unit was tried to be understood.eninfo:eu-repo/semantics/closedAccessCyclopentadithiopheneSilylenebithiophene3,4-PropylenedioxythiopheneHybrid conjugated polymerStructural designAn Electrochromic Polymer Based on Cyclopenta[2,1-B;3,4 Effect of a Single Atom Alteration on the Electrochemical and Optical Properties of the Polymer BackboneArticleQ2265WOS:0005401619000145