Construction of biphenylene dimers and surface‑bound layers to explore donor‑acceptor interactions

Molnár, Kristóf P. and Dobszay, Rita and Szabó, Pál T. and Holczbauer, Tamás and Kunfi, Attila and London, Gábor (2025) Construction of biphenylene dimers and surface‑bound layers to explore donor‑acceptor interactions. STRUCTURAL CHEMISTRY, 36. pp. 937-946. ISSN 1040-0400

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Abstract

Molecular complexes based on donor-acceptor interactions that involve π-systems with antiaromatic character are rarely studied. Herein, we report the synthesis of biphenylene derivatives as potential electron donor components in π-complexes. Molecules with two connected biphenylene units are suitable to probe the formation of differently folded complexes in solution, while biphenylene derivatives with a pendant triethoxysilane group can be used to functionalize solid surfaces and probe interfacial donor-acceptor complex formation. Our results show clear indication of complex formation in solution; however, no observable interaction was found on the surface using UV-vis spectroscopy.

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