期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 1, 页码 213-217出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201508473
关键词
dynamic covalent chemistry; imines; monolayers; polymers; Raman spectroscopy
资金
- Alfred P. Sloan Foundation
- ETH Zurich
- Swiss National Science Foundation
- Chinese Scholarship Council
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 structureproperty relationships.
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