Journal
INORGANIC CHEMISTRY
Volume 55, Issue 17, Pages 8892-8897Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b01419
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Funding
- National Natural Science Foundation of China [21471134]
- Plan for Scientific Innovation Talent of Henan Province [154200510011]
- Program for Science & Technology Innovative Research Team in University of Henan Province [15IRTSTHN-002]
- Startup Fund for PhDs of Natural Scientific Research of Zhengzhou University of Light Industry [2015BSJJ042]
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Herein, we report the synthesis of a new mixed-linker Zn(II)-based metal-organic framework (MOF), {[Zn-2(atz)(2)(bpydb)]-(DMA)(8)}(n) (1) (atz = deprotonated 3-amino-1,2,4-triazole, bpydb = deprotonated 4,4'-(4,4'-bipyridine-2,6-diyl) dibenzoic acid, DMA = N,N-dimethylacetamide), through symmetry modulation of a triazole ligand. The desymmetrized triazole linkers not only bond to the Zn(II) ions to result in a new helical Zn-triazolate chain building unit but also lead to the formation of a highly porous framework (N-2 uptake: 617 cm(3)/g; BET surface area: 2393 m(2)/g) with 1D helical channels. The adsorption properties of desolved 1 were investigated by H-2, C2H2, CO2, and CH4 sorption experiments, which showed that 1 exhibited high uptake capacity for H2 at 77 K and C2H2 around room temperature. More importantly, the high C2H2 uptake capacity but low binding energy makes this MOF a promising candidate for effective C2H2 capture from C2H2/CO2 and C2H2/CH4 mixed gases with low regenerative energy cost. In addition, 1 shows potential application for the luminescence sensing of small aromatic molecules picric acid (PA) and p-xylene (PX).
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