Chen, Pohua

Chen, Xudong

Dong, Xin

Gong, Li

Gölzhäuser, Armin

Hong, Yuexian

Li, Yuyao

Liang, Zihao

Liu, Wei

Qi, Haoyuan

Qiu, Yi

Sun, Junliang

Tan, Fanglin

Vitorica-Yrezabal, Inigo J.

Wang, Chao

Wang, Honglei

Yang, Jing

Yang, Sihai

Yang, Yonghang

Zhang, Lei

Zheng, Zhikun

Zhou, Zhipeng

English

A core feature of covalent organic frameworks (COFs) is crystallinity, but current crystallization processes rely substantially on trial and error, chemical intuition and large-scale screening that typically require harsh conditions and low levels of supersaturation, hampering the controlled synthesis of single51 crystal COFs, particularly on large scales. Here, we report a strategy to produce single-crystal imine-linked COFs in aqueous solutions under ambient conditions using amphiphilic amino-acid derivatives with long hydrophobic chains. We propose that these amphiphilic molecules self-assemble into micelles that serve as dynamic barriers to separate monomers in aqueous solution (nodes) and hydrophobic compartments of the micelles (linkers), thereby regulating the polymerization and crystallization processes. Disordered polyimines were obtained in the micelle, which were then converted into crystals in a step-by-step fashion. Five different three-dimensional COFs and a two-dimensional COF were obtained as single crystals on the gram-scale, with yields of 92% and above

The University of Manchester - Institutional Repository

Growth of single-crystal imine-linked covalent organic frameworks using amphiphilic amino-acid derivatives in water

https://pure.manchester.ac.uk/ws/files/254683595/1.pdf

Growth of single-crystal imine-linked covalent organic frameworks using amphiphilic amino-acid derivatives in water

Abstract

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The University of Manchester - Institutional Repository