Design of a MOF based on octa-nuclear zinc clusters realizing both thermal stability and structural flexibility

Yunsheng Ma; Xiaoyan Tang; Ming Chen; Akio Mishima; Liangchun Li; Akihiro Hori; Xiaoyu Wu; Lifeng Ding; Shinpei Kusaka; Ryotaro Matsuda

doi:10.1039/D1CC05893B

Design of a MOF based on octa-nuclear zinc clusters realizing both thermal stability and structural flexibility†

Yunsheng Ma,

‡*^ab Xiaoyan Tang,

‡^ab Ming Chen,^a Akio Mishima,^b Liangchun Li,

^c Akihiro Hori,

^b Xiaoyu Wu,^d Lifeng Ding,

^d Shinpei Kusaka

^b and Ryotaro Matsuda*^b

Author affiliations

* Corresponding authors

^a School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China
E-mail: myschem@hotmail.com

^b Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
E-mail: ryotaro.matsuda@chembio.nagoya-u.ac.jp

^c Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China

^d Department of Chemistry, Xi’an JiaoTong-Liverpool University, 111 Ren’ai Road, Suzhou Dushu Lake Higher Education Town, Jiangsu Province, China

Abstract

An octa-nuclear zinc (Zn₈) cluster-based two-fold interpenetrated metal–organic framework (MOF) of [(CH₃)₂NH₂]₂[Zn₈O₃(FDC)₆]·7DMF (denoted as Zn₈-as; H₂FDC = 9H-fluorene-2,7-dicarboxylic acid; DMF = N,N-dimethylformamide) was synthesized by the reaction of a hard base of a curved dicarboxylate ligand (H₂FDC) with the borderline acid of Zn(II) under solvothermal conditions. Zn₈-as shows significant crystal volume shrinkage upon heating, yielding a solvate-free framework of [(CH₃)₂NH₂]₂[Zn₈O₃(FDC)₆] (Zn₈-de). Zn₈-de displays gated adsorption for C₂H₂ and type-I adsorption for CO₂, attributed to the framework flexibility and the different interactions between the gas molecules and the host framework.

Chemical Communications

Design of a MOF based on octa-nuclear zinc clusters realizing both thermal stability and structural flexibility†

Abstract

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Design of a MOF based on octa-nuclear zinc clusters realizing both thermal stability and structural flexibility

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