Cakal, DenizCihaner, AtillaCihaner, AtillaOnal, Ahmet M.Chemical Engineering2024-07-052024-07-05202170013-46861873-385910.1016/j.electacta.2021.1380642-s2.0-85102374773https://doi.org/10.1016/j.electacta.2021.138064https://hdl.handle.net/20.500.14411/2075Çakal, Deniz/0000-0003-1656-2430; Onal, ahmet muhtar/0000-0003-0644-7180A series of new donor-acceptor-donor type fluorescent molecules incorporating thieno[3,4-c]pyrrole-4,6-dione (TPD) as the acceptor unit were synthesized. TPD acceptor unit was modified with polyhedral oligomeric silsesquioxanes (POSS) cages and integrated with thiophene and alkylenedioxythiophene derivatives (3,4-ethylenedioxythiophene (EDOT) and 3,4-propylenedioxythiophene (ProDOT)) using Stille coupling reaction. The monomers, T-2-POSS, E-2-POSS, and P-2-POSS, were polymerized successfully via electrochemical and chemical polymerization techniques. As a fingerprint of D-A-D monomers, all monomers showed dual band characteristics due to intramolecular charge transfer. Soluble polymers exhibited reversible electrochromic responses electrochemically and chemically with fast switching times and high coloration efficiencies. E-2-POSS and its polymer PE2-POSS exhibited the lowest oxidation potential and band gap values as compared to their thiophene and ProDOT analogs. Also, P-2-POSS and its chemically obtained fluorescent polymer PP2-POSS-C represented high sensitivity towards Fe2+ and Fe3+ ions, which makes them potential candidates to be amenable for use in ion sensing. (C) 2021 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessElectrochromicsPolymerizationThiophenePOSSD-A-D approachArticleQ2377WOS:000639189500007