10.1021/acsmacrolett.8b00365.s001 Hiroyuki Fujita Hiroyuki Fujita Tsuyoshi Michinobu Tsuyoshi Michinobu Functional Covalent Layer-by-Layer Thin Films by [2 + 2] Cycloaddition–Retroelectrocyclization American Chemical Society 2018 moietie TCNQ dialkylaniline-substituted alkynes cycloaddition film tetracyanoquinodimethane ability charge-transfer Functional Covalent Layer-by-Layer CA redox activities CT chromophores LbL Ag layer-by-layer Cycloaddition Film 2018-06-06 12:49:24 Journal contribution https://acs.figshare.com/articles/journal_contribution/Functional_Covalent_Layer-by-Layer_Thin_Films_by_2_2_Cycloaddition_Retroelectrocyclization/6450107 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<sup>+</sup> ion sensing ability due to the formed CT chromophores.