Covalent layer-by-layer (LbL) thin films with the well-defined charge-transfer (CT) chromophores were fabricated by the highly efficient [2 + 2] cycloaddition–retroelectrocyclization (CA–RE) reaction between the dialkylaniline-substituted alkynes and 7,7,8,8-tetracyanoquinodimethane (TCNQ) moieties. The resulting thin films showed potent redox activities and Ag⁺ ion sensing ability due to the formed CT chromophores.

中文翻译：

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[2 + 2] 环加成-逆电环化的功能性共价层薄膜

通过二烷基苯胺取代的炔烃和二烷基苯胺取代的炔烃和7,7,8,8-四氰基醌二甲烷 (TCNQ) 部分。由于形成的 CT 生色团，所得薄膜显示出强大的氧化还原活性和 Ag ⁺离子感应能力。