【作者】 赵青青； 任宁； 张建军； 耿丽娜； 王淑萍； 石士考；

【Author】 ZHAO Qing-Qing;REN Ning;ZHANG Jian-Jun;Geng Li-Na;WANG Shu-Ping;SHI Shi-Kao;Testing and Analysis Center, Hebei Normal University;College of Chemistry& Material Science, Hebei Normal University;College of Chemical engineering& Material, Handan University;

【机构】 河北师范大学分析测试中心； 河北师范大学化学与材料科学学院； 邯郸学院化工与材料学院；

【摘要】 本文合成了四种单核镧系配合物[Ln（2-Br-5-MOBA）₃（terpy）（H₂O）]（Ln=Gd（1）,Tb（2）,Dy（3）,Er（4）;2-Br-5-MOBA=2-溴-5-甲氧基苯甲酸;terpy=2,2:6’,2’’-三联吡啶）,通过单晶X-射线衍射对四种配合物进行了表征。实验表明四种配合物是同种晶型的八配位的单核分子,这和我们之前所报道的双核结构有所不同。四种配合物的分子结构是非常有意思的:两个相邻的单核结构单元通过氢键作用产生了一个伪双核结构,这些伪双核结构之间通过O-H···Br氢键和π–π堆积相互作用进一步形成了一维链状和二维面状超分子结构。同时还利用同步热分析与傅里叶变换红外联用（TG-FTIR）技术对配合物的热分解机理进行了分析。采用非线性等转化率法（NL-INT法）得到了四种配合物在第一步分解过程中不同转化率下的活化能。并在室温下对配合物2和3的荧光性质进行了研究,结果表明铽和镝的配合物在绿色和黄色发光材料领域有着潜在的应用。另外,还研究了目标配合物对白色念珠菌、大肠杆菌以及金黄色葡萄球菌的抑菌活性。更多还原

【Abstract】 Four new mononuclear lanthanide complexes [Ln（2-Br-5-MOBA）₃（terpy）（H₂O）]（Ln =Gd（1）, Tb（2）, Dy（3）, Er（4）; 2-Br-5-MOBA = 2-bromine-5-methoxybenzoate; terpy =2,2:6’,2’’-terpyridine）have been successfully synthesized and characterized by single-crystal X-ray diffraction.The complexes1-4 were isostructural and eight-coordinated, which is different from the binuclear structure of the previously reported complexes. The molecular structure of complexes1-4 is very interesting: two adjacentmononuclear units are connected through hydrogen bonding giving rise to afake binuclear structure. These fake binuclear units are further linked via O-H···Br hydrogen bonds and slightly offset π–π stacking interactions to from 1D and 2D supramolecular structures. The thermal decomposition mechanism of complexes 1-4 was studied by TG analysis and further authenticated by TG/DSC-FTIR techniques.The activation energy E values of the first decomposition stage for title complexes were calculated by integral iso-conversionalnonlinear（NL-INT） method.The solid-state luminescent propertiesofcomplexes 2 and 3 were investigated atroomtemperature. The result indicates that Tb（Ⅲ） and Dy（Ⅲ） complexes appear to be promisingcandidate for the application as green and yellow luminescent materials. Moreover, the antibacterial activities of title complexes against Candida albicans, Escherichia coliand Staphylococcus aureus were also evaluated.更多还原