title: Synthesis of a Two-Dimensional Covalent Organic Monolayer through Dynamic Imine Chemistry at the Air/Water Interface.
abstract: A two-dimensional covalent organic monolayer was synthesized from simple aromatic triamine and dialdehyde building blocks by dynamic imine chemistry at the air/water interface (Langmuir-Blodgett method). The obtained monolayer was characterized by optical microscopy, scanning electron microscopy, and atomic force microscopy, which unambiguously confirmed the formation of a large (millimeter range), unimolecularly thin aromatic polyimine sheet. The imine-linked chemical structure of the obtained monolayer was characterized by tip-enhanced Raman spectroscopy, and the peak assignment was supported by spectra simulated by density functional theory. Given the modular nature and broad substrate scope of imine formation, the work reported herein opens up many new possibilities for the synthesis of customizable 2D polymers and systematic studies of their structure-property relationships.
authors.affiliation: Department of Materials, Institute of Polymers, Swiss Federal Institute of Technology, ETH Zürich, 8093 Zürich (Switzerland).
authors.forename: Wenyang
authors.initials: W
authors.lastname: Dai
authors.affiliation: Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, 8093 Zürich (Switzerland).
authors.forename: Feng
authors.initials: F
authors.lastname: Shao
authors.affiliation: Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, 8093 Zürich (Switzerland).
authors.forename: Jacek
authors.initials: J
authors.lastname: Szczerbiński
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309 (USA).
authors.forename: Ryan
authors.initials: R
authors.lastname: McCaffrey
authors.affiliation: Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, 8093 Zürich (Switzerland).
authors.forename: Renato
authors.initials: R
authors.lastname: Zenobi
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309 (USA).
authors.forename: Yinghua
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Department of Materials, Institute of Polymers, Swiss Federal Institute of Technology, ETH Zürich, 8093 Zürich (Switzerland).
authors.forename: A Dieter
authors.initials: AD
authors.lastname: Schlüter
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309 (USA). wei.zhang@colorado.edu.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
keywords: Raman spectroscopy; dynamic covalent chemistry; imines; monolayers; polymers