Liu Qing, Yang Ji-Min, Guo Fan, Jin Li-Na, Sun Wei-Yin
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, China.
Dalton Trans. 2016 Apr 7;45(13):5841-7. doi: 10.1039/c5dt04944j. Epub 2016 Mar 4.
Nano/microscale lanthanide porous coordination polymer MIL-103(Eu) [Eu(BTB)] (H3BTB = 4,4',4''-benzene-1,3,5-triyl-tribenzoic acid) crystals have been fabricated at room temperature by a facile, convenient and environmentally friendly method. The structures of the products were confirmed by powder X-ray diffraction, and the crystal morphologies, including microrods, nanorods and nanospheres, were characterized by scanning electron microscopy. It is found that the addition of sodium acetate and the concentration of the reactants have an important impact on the morphology and size of the MIL-103(Eu) crystals. Gas adsorption measurements reveal that the products show high specific surface areas among the rare earth based coordination polymers and the MIL-103(Eu) nanorods can selectively adsorb CO2 over N2 under ambient conditions. Furthermore, all the products exhibit red emission corresponding to the (5)D0→(7)F2 transition of the Eu(iii) ion, and MIL-103(Eu) nanorods display sensitive and selective sensing for Cu(ii) ions and acetone molecules in solution.
通过一种简便、便捷且环保的方法，在室温下制备了纳米/微米级镧系元素多孔配位聚合物MIL-103(Eu) [Eu(BTB)]（H3BTB = 4,4',4''-苯-1,3,5-三基-三苯甲酸）晶体。通过粉末X射线衍射确认了产物的结构，并用扫描电子显微镜对包括微棒、纳米棒和纳米球在内的晶体形态进行了表征。发现醋酸钠的添加和反应物浓度对MIL-103(Eu)晶体的形态和尺寸有重要影响。气体吸附测量表明，在基于稀土的配位聚合物中，产物具有较高的比表面积，并且MIL-103(Eu)纳米棒在环境条件下能够选择性地吸附CO2而不是N2。此外，所有产物都表现出对应于Eu(iii)离子(5)D0→(7)F2跃迁的红色发射，并且MIL-103(Eu)纳米棒对溶液中的Cu(ii)离子和丙酮分子表现出灵敏且选择性的传感性能。
