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Multiple C-H⋯anion and N-H⋯anion hydrogen bond directed two-dimensional crystalline nanosheets with precise distance control of surface charges for enhanced DNA capture

Zhou, Laicheng, He, Ran, Qin, Yang, Wu, Yi-Lin, Jiang, Li, Zhou, Dong-Dong and Zhang, Ling 2021. Multiple C-H⋯anion and N-H⋯anion hydrogen bond directed two-dimensional crystalline nanosheets with precise distance control of surface charges for enhanced DNA capture. Soft Matter 17 (40) , pp. 9125-9130. 10.1039/D1SM01152A

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Abstract

Utilizing combined non-covalent interactions and introducing anions as structure-directing factors to build oriented self-assembly and 2D crystalline nanosheet superstructures with precise distance control of surface charges in competitive aqueous solvents still represents a formidable challenge for supramolecular chemists. Here we report a simple, efficient, and general strategy for multiple C–H/N–H⋯anion hydrogen bond enhanced π–π interaction directed 2D oriented self-assembly in water, which is based on the head-to-tail association of perylene monoimide dimers (PMIs) by directing N–H⋯anion interactions to position the anions to the C–H of π systems (PMIs). Interesting, this behavior only occurs for size-matched anions (Cl− to NO3−; <45 Å3), while larger anions could not form 2D crystalline nanosheet superstructures. The results show that crystalline nanosheet superstructures with precise distance control of surface charges can effectively capture DNA, possibly due to their high surface charge density and the distance match between the distance of surface charges and the distance between adjacent base pairs.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Royal Society of Chemistry
ISSN: 1744-683X
Funders: National Natural Science Foundation of China
Date of First Compliant Deposit: 18 October 2021
Date of Acceptance: 13 September 2021
Last Modified: 14 Sep 2022 04:44
URI: https://orca.cardiff.ac.uk/id/eprint/144907

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