Mesoporous Hexanuclear Copper Cluster-Based Metal-Organic Framework with Highly Selective Adsorption of Gas and Organic Dye Molecules

Dongmei Wang; Jian Zhang; Guanghua Li; Jiaqi Yuan; Jiantang Li; Qisheng Huo; Yunling Liu

doi:10.1021/acsami.8b06340

Mesoporous Hexanuclear Copper Cluster-Based Metal-Organic Framework with Highly Selective Adsorption of Gas and Organic Dye Molecules

ACS Appl Mater Interfaces. 2018 Sep 19;10(37):31233-31239. doi: 10.1021/acsami.8b06340. Epub 2018 Sep 7.

Authors

Dongmei Wang¹, Jian Zhang², Guanghua Li², Jiaqi Yuan², Jiantang Li², Qisheng Huo², Yunling Liu²

Affiliations

¹ College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , P. R. China.
² State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , Changchun 130012 , P. R. China.

PMID: 30146879
DOI: 10.1021/acsami.8b06340

Abstract

Despite many advances in the design and assembly of mesoporous metal-organic frameworks (meso-MOFs), it is still a challenge to obtain the desired structure. Here, we utilized an effective cluster cooperative assembly strategy by introducing SO₄^2- ions as chelating binding sites to construct a novel mesoporous MOF, [Cu₈(SO₄)(TBA)₆(OH)₂( N,N-dimethylacetamide (DMA))₄]·12DMA·12CH₃OH [JLU-MOF51, H₂TBA = 4-(1 H-tetrazol-5-yl)-benzoic acid]. Remarkably, the cooperative assembly of the infrequent hexanuclear [Cu₆SO₄(OH)₂] cluster and the classical paddlewheel [Cu₂(CO₂)₄] via linear hetero-N, O donor ligand results in an open three-dimensional framework, which possesses one-dimensional nanometer tube channels with the diameter of 24 and 28 Å. Fascinatingly, JLU-MOF51 displays an exceptionally large Langmuir surface area (5443 m² g^-1) and exhibits a high capacity for selective adsorption of C₃H₈ (C₃H₈: 348 cm³ g^-1 at 273 K; C₃H₈/CH₄ = 220 at 298 K). In addition, JLU-MOF51 can selectively adsorb fluorescein disodium salt dye among numerous organic dyes. An extremely high surface area and unique structural characteristics make JLU-MOF51 a promising meso-MOF material for the adsorption and separation of hydrocarbon gases and organic dyes. Moreover, this strategy will provide an effective means for constructing meso-MOFs via one-step synthesis.

Keywords: cluster cooperative assembly strategy; dye adsorption; gas adsorption and separation; hexanuclear Cu cluster; mesoporous metal−organic frameworks.