案例教学与翻转学习结合提升物理化学教学质量

结合我校应用型人才培养方案和培养目标,通过改革物理化学课堂教学提高学生知识掌握能力和应用能力。在传统课堂的基础上,将案例教学结合在翻转学习的教学过程中,充分提高学生的学习积极性与主动性。以稀溶液的依数性为教学案例,阐述翻转学习与案例教学的实施过程。学生深度参与课堂、融入课堂并互动,师生之间在教学中达到共鸣,实现教学相长,从而提高物理化学教学质量。     

Crystal Structure and Antimicrobial Properties of Rare Earths Aryl-acylhydrazone Complexes under Microwave Irradiation

2-Carbonyl propionic acid-4-methyl benzoyl hydrazone(PAMH) has been synthesized by using 4-methyl benzoyl hydrazine and pyruvic acid as the chemicals and acetic acid as phase transfer catalyst under microwave radiation. Then the PAMH and Tb Cl3·6 H2 O are placed in the methanol/acetone/water(3:2:4) mixture for coordination reaction, getting the Schiff complex Tb(PAMH)3. The crystal structure is characterized by elemental analysis, X-ray Diffraction(XRD) and infrared spectrum. The compound crystallizes in the monoclinic space group P21/n, with a = 1.4770(4), b = 1.2864(3), c = 1.9287(5) nm, β = 92.06(3)o, V = 3.6623(15) nm3 and Z = 4. Tb(III) ion is nona-coordinated by three completely deprotonated PAMH ligands in a tricapped trigonal prism geometry, leaving a zero-dimensional mononuclear configuration. The optical properties and thermal stability are studied by ultraviolet spectrum, fluorescence spectra and thermogravimetric analysis(TGA). The antibacterial activities of the ligand and rare-earth complex are preliminarily studied, and found they have certain antibacterial activity on fusarium solani, and the complex is obviously more effective in suppressing fusarium solani than the ligand.     

基于芳香酰腙配体的锰配合物的合成、晶体结构与性质

本文合成了2-羰基丙酸-2-甲氧基苯甲酰腙锰配合物,并借助X-射线单晶衍射测定了配合物的晶体结构。该晶体属于单斜晶系P-1空间群,晶胞参数为,a=0.7925(2)nm,b=1.0529(3)nm,c=1.1069(4)nm,α=68.142(6)°,β=69.053(4)°,γ=71.292(4)°,V=0.7816(4)nm~3,Z=1。在一个不对称单元中,Mn离子是七配位,且被镶嵌在一个有微弱形变的五角双锥结构内,配合物整体呈现双核的零维结构。利用红外光谱、紫外光谱、荧光光谱研究了其光谱性质。     

4,4'-二溴-6,6'-二(N,N-二(乙氧基羰甲基)氨甲基)-2,2'-联吡啶的合成与表征

以4,4'-二硝基-6,6'-二甲基-2,2'-联吡啶-N,N'-二氧化物为起始原料,经过三氟乙酸酐酯化、羟甲基化、氢溴酸溴甲基化及亚氨基二乙酸二乙酯氢胺基甲基化合成了4,4'-二溴-6,6'-二(N,N-二(乙氧基羰甲基)氨甲基)-2,2'-联吡啶。通过熔点、红外光谱、核磁共振、高效液相色谱、高分辨质谱测试技术表征了该化合物的结构,为合成时间分辨荧光免疫分析新型双功能螯合剂提供了重要中间体。