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Tetrazole-based porous metal-organic frameworks for selective CO2 adsorption and isomerization studies

Abstract

Tetrazole-based molecules are of numerous bridging coordination modes affording great synthetic possibilities for the preparation of porous metal-tetrazolate architectures for many applications, such as carbon captures. We reported here three tetrazole-based MOFs: 1, {[Cu12(ttz)8/3Cl5(H2O)16]11+·11Cl–}n (H3ttz = N2,N4,N6-tris(4-(1H-tetrazol-5-yl)phenyl)-1,3,5-triazine-2,4,6-triamine), contains highly positively charged Cu12 clusters and largest mesopores (32 Å) in the reported MOFs based on tri-topic tetrazole ligand. 2 and 3 are two MOF isomers built by CuII and 2-(1H-tetrazol-5-yl)pyrimidine. 3 contains nonporous layers, while 2 contains 1D channel and showed high selectivity for adsorbing CO2, which should be attributed to the high density of free nucleophilic tetrazole N atoms on the pore surfaces. We found that the isomerization between 2 and 3 was caused by the diverse coordination mode of tetrazole-based ligand and can be controlled in the synthesis processes.

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Article information


Submitted
17 Oct 2019
Accepted
13 Jan 2020
First published
14 Jan 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Tetrazole-based porous metal-organic frameworks for selective CO2 adsorption and isomerization studies

R. Zhang, D. Meng, F. Ge, J. Huang, M. Meng, L. Wang, Y. Xu, X. Liu, H. Yan, Z. Lu, H. Zheng and W. Huang, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/C9DT04068D

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