A Novel Near-IR Effective Pyrene-Based Donor-Acceptor Electrochrome

Date

2015-04-01

Author

Sefer, Emre
HACIOGLU, Serife O.
Tonga, Murat
Toppare, Levent Kamil
Çırpan, Ali
KOYUNCU, SERMET

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In 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.

Subject Keywords

NIR electrochromic polymers, Planar structure, Pyrenes

URI

https://hdl.handle.net/11511/46812

Journal

MACROMOLECULAR CHEMISTRY AND PHYSICS

DOI

https://doi.org/10.1002/macp.201400584

Collections

Department of Chemistry, Article

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Citation Formats

E. Sefer, S. O. HACIOGLU, M. Tonga, L. K. Toppare, A. Çırpan, and S. KOYUNCU, “A Novel Near-IR Effective Pyrene-Based Donor-Acceptor Electrochrome,” MACROMOLECULAR CHEMISTRY AND PHYSICS, pp. 829–836, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46812.