混合配体构筑的Cd(Ⅱ)配合物的合成及其荧光性质
Synthesis and fluorescence properties of Cd(Ⅱ)complexes constructed with mixed ligands
王凯民 1顾雄 1杨冲福 1邓娜 1叶艳青 1周强 1马钰璐2
作者信息
- 1. 云南民族大学化学与环境学院,云南 昆明 650504
- 2. 昆明医科大学药学院/云南省天然药物药理重点实验室,云南 昆明 650500;昆明医科大学现代生物医药产业学院,云南 昆明 650500
- 折叠
摘要
采用含N刚性配体4,4'-联吡啶(bpy)与两性离子配体4-羧基-1-(3-羧基苄基)吡啶-1-(鎓)氯化物(H2LCl)混合的模式,利用液相扩散法,在室温下与Cd2+自组装构筑了一例结构新颖的配合物{[Cd2.5(L)2(bpy)2Cl(NO3)(H2O)3]·(NO3)·2H2O}.通过单晶X衍射、Hirshfeld表面与二维指纹图、粉末X射线衍射、热重及固体荧光对配合物的结构及性质进行了分析.研究表明,该配合物为[Cd(bpy)2]对称棒状单元与两条平行环链结构组成的一维梯子形链.借助丰富的分子间相互作用(π···π堆积、O—H…O及C—H…O氢键)配合物的梯子形链平行互穿,相互堆积,最终形成稳定的三维超分子结构.此外,由于d10金属离子的存在,配合物在425～466 nm波长范围内显示出与配体H2LCl相似但强度增强的浅绿色荧光,CIE色坐标为(0.287 0,0.334 6).
Abstract
A novel coordination polymer{[Cd2.5(L)2(bpy)2Cl(NO3)(H2O)3]·(NO3)·2H2O}was constructed by self-assembly at room temperature using a mixture of N containing rigid ligand 4,4'-bipyridine(bpy),zwitterionic ligand 4-carboxyl-1-(3-carboxybenzyl)pyridin-1-onium chloride(H2LCl)and Cd2+using liquid phase diffusion method.The structures and properties of the coordination polymer were analyzed by single crystal X-ray diffraction,Hirshfeld surface and two-dimensional fingerprint,powder X-ray diffraction,thermogravimetry,and solid fluorescence.The results showed that the coor-dination polymer is a one-dimensional ladder shaped chain composed of[Cd(bpy)2]symmetric rod-shaped unit and two parallel ring chain structures.By abundant intermolecular interactions(π···π stacking interactions,O—H···O,and C—H···O hydrogen bonding),the ladder shaped chains pene-trate parallel and stack with each other,ultimately forming a stable three-dimensional supramolecular structure.In addition,due to the presence of d10 metal ions,the coordination polymer exhibits a similar but enhanced light green fluorescence to the ligand H2LCl in the wavelength range of 425-466 nm,with CIE coordinates is(0.287 0,0.334 6).
关键词
配合物/晶体结构/液相扩散/分子间相互作用/固体荧光Key words
coordination polymer/crystal structure/liquid phase diffusion method/intermolecular interactions/solid state fluorescence引用本文复制引用
基金项目
国家自然科学基金(22065039)
云南省科技厅基础研究项目(202301AT070264)
昆明医科大学本科教学质量与教学改革工程一流课程建设项目(2022JXZ018)
出版年
2024
国家科技期刊平台
NSTL
万方数据