Ultrathin Two-Dimensional Covalent Organic Framework Nanosheets: Preparation and Application in Highly Sensitive and Selective DNA Detection
Citations Over TimeTop 1% of 2017 papers
Abstract
The ability to prepare ultrathin two-dimensional (2D) covalent organic framework (COF) nanosheets (NSs) in high yield is of great importance for the further exploration of their unique properties and potential applications. Herein, by elaborately designing and choosing two flexible molecules with C3v molecular symmetry as building units, a novel imine-linked COF, namely, TPA-COF, with a hexagonal layered structure and sheet-like morphology, is synthesized. Since the flexible building units are integrated into the COF skeletons, the interlayer stacking becomes weak, resulting in the easy exfoliation of TPA-COF into ultrathin 2D NSs. Impressively, for the first time, the detailed structural information, i.e., the pore channels and individual building units in the NSs, is clearly visualized by using the recently developed low-dose imaging technique of transmission electron microscopy (TEM). As a proof-of-concept application, the obtained ultrathin COF NSs are used as a novel fluorescence sensing platform for the highly sensitive and selective detection of DNA.
Related Papers
- → Imine and imine-derived linkages in two-dimensional covalent organic frameworks(2022)350 cited
- → Green synthesis of imine-based covalent organic frameworks in water(2020)112 cited
- → Promoting charge separation by rational integration of a covalent organic framework on a BiVO4 photoanode(2022)20 cited
- → Morphology controlled synthesis of octahedral covalent imine frameworks through acid modulated aldehyde-amine polycondensation(2016)15 cited
- → Macromolecular Rapid Communications(2006)578 cited