Sefer, EmreHacioglu, Serife O.Tonga, MuratToppare, LeventCirpan, AliKoyuncu, Sermet2025-01-272025-01-2720151022-13521521-3935https://doi.org/10.1002/macp.201400584https://hdl.handle.net/20.500.12428/21963In this work, a novel donor-acceptor electrochromic monomer (3HTP), containing a pyrene subunit connected to a quinoxaline acceptor bridge, is synthesized. The corresponding polymer, poly-(3HTP), is directly deposited onto an indium tin oxide (ITO)/glass surface via an electrochemical process. Atomic force microscopy (AFM) images reveal that the electrochemically deposited poly-(3HTP) has a smooth surface due to self-assembly of the planar pyrene subunit. Electrochemical and optical properties are investigated via cyclic voltammetry and UV-vis absorption measurements. The polymer film shows a multielectrochromic feature at both anodic and cathodic regimes. Poly-(3HTP) exhibits a strong near-infrared (NIR) absorption at the oxidized state with an optical contrast of 88% (at 1800 nm), a very fast response time of 0.5 s and fast switching times, and long-term stability. Density functional theory calculations reveal that the molecule has a high planarity, and the NIR absorption arises from a strong intramolecular charge transfer from the polymer backbone to the planar pyrene subunit.eninfo:eu-repo/semantics/closedAccessNIR electrochromic polymersplanar structurepyrenesArticle216882983610.1002/macp.201400584Q2WOS:0003539153000022-s2.0-84927913602Q2