离子迁移数作为物理化学课程中电化学部分的一个重要概念，其测定实验被设置在多所高校的物理化学实验课程中。文献调研及过往教学实践表明，使用希托夫(Hittorf)法测定的离子迁移数，结果与文献值有较大出入。为了降低测定误差，以及探究测试结果的影响因素，本实验从溶液装液量控制、断液断电顺序、计算电量的数据来源三个方面进行改进，尽可能降低实验操作和浓度测定导致的误差，从而分析真正影响测试结果的因素。实验表明，当采用电流乘以时间作为电量的数据来源，且采用阴极区溶液计算离子迁移数时，所得结果更接近实验参考值。

研究生培养肩负着高层次人才培养和创新创造的使命，是国家发展的重要基石。东北师范大学化学学科以立德树人、服务需求、提高质量、追求卓越为主线，重点从完善培养方案，严控培养环节，强化论文质量管控，落实创新成果要求，创新人才培养一体化五方面举措，努力构建质量更高、效益更好、优势充分释放的研究生培养体系。

We used pentacarboxylic acid ligand 3, 5-di(2', 4'-dicarboxylphenyl) benzoic acid (H₅L) to synthesize two structural similarity lanthanide-cobalt heteronuclear bimetallic organic frameworks (Ln-Co-MOFs) by hydrothermal method: (C₂H₆NH₂)₅{[Eu₉Co(L)₆(H₂O)₅(OH)₄] ·5DMF}_n (1), (C₂H₆NH₂)₂{[Sm₉Co(L)₆(H₂O)₃Cl] ·5DMF}_n (2). The structures were characterized and the property was tested by single crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry, infrared, fluorescence spectra, and magnetism. The results show that 1 and 2 both belong to the trigonal R3 space group and have novel 3D structures and good thermal stability. Among them, 1 has strong fluorescence properties, which can sensitively identify drug molecules sulfasalazine and organic molecules glutaraldehyde. The detection limits could reach 0.95 and 2.10 μmol·L^-1, respectively. In addition, 1 and 2 were antiferromagnetic at 1 kOe.