Dramatic improvement of stability by in situ linker cyclization of a metal–organic framework

Yun-Long Hou; Mu-Qing Li; Shengxian Cheng; Yingxue Diao; Filipe Vilela; Yonghe He; Jun He; Zhengtao Xu

doi:10.1039/C8CC05225E

Dramatic improvement of stability by in situ linker cyclization of a metal–organic framework†

Yun-Long Hou,^a Mu-Qing Li,^abc Shengxian Cheng,^a Yingxue Diao,^ac Filipe Vilela,^d Yonghe He,^e Jun He^e and Zhengtao Xu

*^a

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* Corresponding authors

^a Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China
E-mail: zhengtao@cityu.edu.hk

^b Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710054, China

^c Department of Material Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China

^d School of Engineering and Physical Sciences, Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, UK

^e School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China

Abstract

We employ a two-step strategy for accessing crystalline porous covalent networks of highly conjugated π-electron systems. For this, we first assembled a crystalline metal–organic framework (MOF) precursor based on Zr(IV) ions and a linear dicarboxyl linker molecule featuring backfolded, highly unsaturated alkyne backbones; massive thermocyclization of the organic linkers was then triggered to install highly conjugated, fused-aromatic bridges throughout the MOF scaffold while preserving the crystalline order. The formation of cyclized carbon links not only greatly strengthens the precursor coordination scaffold, but also, more importantly, enhances electroactivity and charge transport throughout the polycyclic aromatic grid.

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DOI: https://doi.org/10.1039/C8CC05225E
Article type: Communication
Submitted: 29 Jun 2018
Accepted: 30 Jul 2018
First published: 31 Jul 2018

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Chem. Commun., 2018,54, 9470-9473

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Dramatic improvement of stability by in situ linker cyclization of a metal–organic framework

Y. Hou, M. Li, S. Cheng, Y. Diao, F. Vilela, Y. He, J. He and Z. Xu, Chem. Commun., 2018, 54, 9470 DOI: 10.1039/C8CC05225E

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Dramatic improvement of stability by in situ linker cyclization of a metal–organic framework†

Abstract

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Dramatic improvement of stability by in situ linker cyclization of a metal–organic framework

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