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    Interfacial Synthesis of an Ultrathin Two-Dimensional Polymer Film via [2 + 2] Photocycloaddition

    Year: 2023

    Journal: Molecules, Volume 28, 2023-01, page 1930

    Authors: Ban, Yanqi; Wang, Hui; Xiao, Zixuan; Sun, Lishui; Pan, Qingyan; Zhao, Yingjie

    Keywords: porous materials; [2 + 2] cycloaddition; covalent organic frameworks; interfacial synthesis; photochemistry; two-dimensional polymers

    A carbon–carbon-linked, ultrathin, two-dimensional (2D) polymer film was prepared at the air/water interface through photochemically triggered [2 + 2] cycloaddition. The preorganization of the monomers on the water surface and the subsequent photo-polymerization led to the successful preparation of the ultrathin 2D polymer film. The obtained film is continuous, free standing, and has a large area (over 50 μm2). Transmission electron microscopy (TEM) and atomic force microscopy (AFM) give clear evidence of the ultrathin film morphology. Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) indicate successful photo-induced [2 + 2] polymerization.
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