Single crystal of a one-dimensional metallo-covalent organic framework

Hai-Sen Xu, Yi Luo, Xing Li, Pei Zhen See, Zhongxin Chen, Tianqiong Ma, Lin Liang, Kai Leng, Ibrahim Abdelwahab, Lin Wang, Runlai Li, Xiangyan Shi, Yi Zhou, Xiu Fang Lu, Xiaoxu Zhao, Cuibo Liu, Junliang Sun () and Kian Ping Loh ()
Additional contact information
Hai-Sen Xu: National University of Singapore
Yi Luo: Peking University
Xing Li: National University of Singapore
Pei Zhen See: National University of Singapore
Zhongxin Chen: National University of Singapore
Tianqiong Ma: Peking University
Lin Liang: Lanzhou University
Kai Leng: National University of Singapore
Ibrahim Abdelwahab: National University of Singapore
Lin Wang: National University of Singapore
Runlai Li: National University of Singapore
Xiangyan Shi: Nanyang Technological University
Yi Zhou: Shanghai Tech University
Xiu Fang Lu: National University of Singapore
Xiaoxu Zhao: National University of Singapore
Cuibo Liu: National University of Singapore
Junliang Sun: Peking University
Kian Ping Loh: National University of Singapore

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract Although polymers have been studied for well over a century, there are few examples of covalently linked polymer crystals synthesised directly from solution. One-dimensional (1D) covalent polymers that are packed into a framework structure can be viewed as a 1D covalent organic framework (COF), but making a single crystal of this has been elusive. Herein, by combining labile metal coordination and dynamic covalent chemistry, we discover a strategy to synthesise single-crystal metallo-COFs under solvothermal conditions. The single-crystal structure is rigorously solved using single-crystal electron diffraction technique. The non-centrosymmetric metallo-COF allows second harmonic generation. Due to the presence of syntactic pendant amine groups along the polymer chains, the metallopolymer crystal can be further cross-linked into a crystalline woven network.

Date: 2020
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DOI: 10.1038/s41467-020-15281-1

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