Chen Di-Ming, Tian Jia-Yue, Liu Chun-Sen
Henan Provincial Key Lab of Surface & Interface Science, Zhengzhou University of Light Industry , Zhengzhou 450002, Henan, China.
Inorg Chem. 2016 Sep 6;55(17):8892-7. doi: 10.1021/acs.inorgchem.6b01419. Epub 2016 Aug 5.
Herein, we report the synthesis of a new mixed-linker Zn(II)-based metal-organic framework (MOF), {Zn2(atz)2(bpydb)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 (N2 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 H2, 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).
在此，我们报道了一种新型混合连接体锌（II）基金属有机框架（MOF）{Zn2(atz)2(bpydb)8}n（1）（atz = 去质子化的3-氨基-1,2,4-三唑，bpydb = 去质子化的4,4'-(4,4'-联吡啶-2,6-二基)二苯甲酸，DMA = N,N-二甲基乙酰胺）的合成，通过对三唑配体进行对称性调制。去对称化的三唑连接体不仅与锌（II）离子结合形成新的螺旋状锌-三唑链构建单元，还导致形成具有一维螺旋通道的高度多孔框架（N2吸附量：617 cm³/g；BET表面积：2393 m²/g）。通过H2、C2H2、CO2和CH4吸附实验研究了去溶剂化的1的吸附性能，结果表明1在77 K时对H2以及在室温附近对C2H2表现出高吸附容量。更重要的是，高C2H2吸附容量但低结合能使得这种MOF成为从C2H2/CO2和C2H2/CH4混合气体中有效捕获C2H2且再生能量成本低的有前景的候选材料。此外，1在对小分子芳香族化合物苦味酸（PA）和对二甲苯（PX）的发光传感方面显示出潜在应用。
