Tuning Water Sorption in Highly Stable Zr(IV)-Metal-Organic Frameworks through Local Functionalization of Metal Clusters

Yong-Zheng Zhang; Tao He; Xiang-Jing Kong; Xiu-Liang Lv; Xue-Qian Wu; Jian-Rong Li

doi:10.1021/acsami.8b09333

Tuning Water Sorption in Highly Stable Zr(IV)-Metal-Organic Frameworks through Local Functionalization of Metal Clusters

ACS Appl Mater Interfaces. 2018 Aug 22;10(33):27868-27874. doi: 10.1021/acsami.8b09333. Epub 2018 Aug 8.

Authors

Yong-Zheng Zhang¹, Tao He¹, Xiang-Jing Kong¹, Xiu-Liang Lv¹, Xue-Qian Wu¹, Jian-Rong Li¹

Affiliation

¹ Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China.

PMID: 30044076
DOI: 10.1021/acsami.8b09333

Abstract

Water adsorption of metal-organic frameworks (MOFs) is attracting intense interest because of their potential applications in atmospheric water harvesting, dehumidification, and adsorption-based heating and cooling. In this work, through using a hexacarboxylate ligand, four new isostructural Zr(IV)-MOFs (BUT-46F, -46A, -46W, and -46B) with rare low-symmetric 9-connected Zr₆ clusters were synthesized and structurally characterized. These MOFs are highly stable in water, HCl aqueous solution (pH = 1), and NaOH aqueous solution (pH = 10) at room temperature, as well as in boiling water. Interestingly, the rational modification of the metal clusters in these MOFs with different functional groups (HCOO^-, CH₃COO^-, H₂O/OH, and PhCOO^-) enables the precise tuning of their water adsorption properties, which is quite important for given application. Furthermore, all four MOFs show excellent regenerability under mild conditions and good cyclic performance in water adsorption.

Keywords: (6,9)-connected network; Zr(IV)-MOF; post-modification; stability; water sorption.