紫精基光敏配位聚合物的制备与光色-荧光性质研究的综合实验教学设计  

Comprehensive Experimental Teaching Design on Synthesis and Photochromic-fluorescent Properties of Viologen-based Metal-organic Coordination Polymer

作　　者：张杰 吕丽花 Zhang Jie;Lv Lihua(School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510641;Guangzhou Tieyi Middle School,Guangzhou 510660,China)

机构地区：[1]华南理工大学化学与化工学院,广东广州510641 [2]广州市铁一中学,广东广州510660

出　　处：《广东化工》2023年第5期201-204,共4页Guangdong Chemical Industry

基　　金：广东省自然科学基金(2020A1515010378);华南理工大学探索性实验项目(C9226620)。

摘　　要：金属-有机光敏配位聚合物因其在光敏器件方面的研究价值和应用前景而受到广泛关注。本实验合成了一例紫精基光敏金属-有机配位聚合物,并围绕其制备、晶体结构、光致变色-荧光变色等性质设计了综合性实验教学。以甲基紫精阳离子为模板,5-((3,5-二羧基苄基)氧基)间苯二甲酸和锌离子配位形成具有孔道的负电性Zn-MOF框架,构建了一例荧光-光色化合物[Zn_(3)(MV^(2+))(L^(4-))_(2)]·2H_(2)O。光照后,化合物颜色由土黄色变为深绿色,荧光发射强度发生明显的衰减,对于信号存储、光控开关等领域具有很好的潜在应用价值。该实验有助于学生理解“无机化学”中的重难点知识和科学素养的培养。Metal-organic photo-sensitive coordination polymers have received extensive attentions for their high research value and wide application potential in photo-sensitive devices.Here,a comprehensive teaching experiment was designed based on the preparation,crystal structure analysis,photochromic-fluorescent properties of the complex[Zn_(3)(MV^(2+))(L^(4-))_(2)]·2H_(2)O,which was constructed with the template methyl viologen cations and a three-dimensional negatively charged porous framework Zn-MOF.Under illumination,the color of the compound changed from khaki to dark green,and the fluorescence emission intensity decreased due to the energy transfer among the photoactive molecules,which may has a good potential application value in the fields of no-distructive storage and fluorescence switch.This teaching can help students understand the emphases and difficulties in the Inorganic Chemistry and cultivate their scientific literacy.

关 键 词：配位聚合物 光色-荧光 电子迁移 实验教学 晶体设计 

分 类 号：TQ[化学工程]