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

Chem Commun (Camb). 2022 Jan 25;58(8):1139-1142. doi: 10.1039/d1cc05893b.

Authors

Yunsheng Ma^{1

2}, Xiaoyan Tang^{1

2}, Ming Chen¹, Akio Mishima², Liangchun Li³, Akihiro Hori², Xiaoyu Wu⁴, Lifeng Ding⁴, Shinpei Kusaka², Ryotaro Matsuda²

Affiliations

¹ School of Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu, Jiangsu 215500, China. myschem@hotmail.com.
² Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan. ryotaro.matsuda@chembio.nagoya-u.ac.jp.
³ Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
⁴ Department of Chemistry, Xi'an JiaoTong-Liverpool University, 111 Ren'ai Road, Suzhou Dushu Lake Higher Education Town, Jiangsu Province, 215123, China.

PMID: 34981084
DOI: 10.1039/d1cc05893b

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.