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

Rui Zhang, De Xian Meng, Fa Yuan Ge, Jv Hua Huang, Li Fei Wang, Yong Kai Xv, Xing Gui Liu, Mei Mei Meng, Hong Yan, Zhen Zhong Lu, He Gen Zheng, Wei Huang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Tetrazole-based molecules have numerous bridging coordination modes which afford great synthetic possibilities for the preparation of porous metal-tetrazolate architectures for many applications, such as carbon capture. 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 the largest mesopores (32 Å) among the reported MOFs based on a tri-topic tetrazole ligand. 2 and 3 are two MOF isomers built by using CuII and 2-(1H-tetrazol-5-yl)pyrimidine. 3 contains nonporous layers, while 2 contains 1D channels 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 modes of tetrazole-based ligands and can be controlled in synthesis processes.

Original languageEnglish
Pages (from-to)2145-2150
Number of pages6
JournalDalton Transactions
Volume49
Issue number7
DOIs
StatePublished - 21 Feb 2020

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