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Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Published on: March 8, 2024

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

Dongmei Wang¹, Jian Zhang², Guanghua Li²

¹College of Chemistry and Life Sciences , Zhejiang Normal University , Jinhua 321004 , P. R. China.

ACS Applied Materials & Interfaces

|August 28, 2018

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

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