Assembly of Zn-metal organic frameworks based on a N-rich ligand: selective sorption for CO2 and luminescence sensing of nitro explosives

作者：Hu, Xiao-Li; Qin, Chao^*; Zhao, Liang; Liu, Fu-Hong; Shao, Kui-Zhan; Su, Zhong-Min

来源：RSC Advances, 2015, 5(61): 49606-49613.

DOI：10.1039/c5ra05945c

• CARBON-DIOXIDE CAPTURE
• COORDINATION POLYMERS
• HYDROGEN STORAGE
• CRYSTAL-STRUCTURES
• TUNABLE PLATFORM
• SMALL MOLECULES
• CATALYSIS
• SITES
• ADSORPTION
• GENERATION

Two novel Zn(II) coordination polymer compounds, namely, [Zn-3(HL)(2)(fma)(2)]center dot DMA center dot H2O (1) and [Zn-2(mu(3)-OH)(HL)(Br-bdc)]center dot 0.5DMA center dot CH3OH center dot H2O (2) have been successfully obtained with 1-(5-tetrazolyl)-4-(1-imidazolyl) benzene ligand and dicarboxylic acids (fma = fumaric acid; Br-bdc = 2-bromoterephthalic acid). Compound 1 exhibits a 3D framework with a square aperture diameter for the channel is 8.8 x 8.8 angstrom(2), and the framework can be simplified as a (3,4)-connected tfj network with the point symbol of {4.8(2)}(4){4(2).8(4)}(2){8(4).12(2)} topology. In compound 2, the HL ligand forms a 2D sheet of Zn(HL) by linking Zn ions along the c axis, which are further connected by double Br-bdc pillars resulting in unique bi-pillared-layer type 3D frameworks. The result, 1a, exhibits a certain degree of CO2 uptake and selective CO2/N-2 adsorption capacity. Furthermore, luminescent properties of 1a well dispersed in different solvents have also been investigated systematically, which demonstrate distinct solventdependent luminescent spectra with emission intensities significantly quenched toward acetone and nitrobenzene.

• 出版日期2015
• 单位东北师范大学