摘要
以4,7⁃二(1H⁃1,2,4⁃三氮唑⁃1⁃基)⁃2,1,3⁃苯并噻二唑(DDBD)为主配体,1,4⁃萘二甲酸(H_(2)NDC)为辅助配体,通过溶剂热法合成得到了一例三维Cd^(Ⅱ)配位聚合物[Cd_(2)(DDBD)(NDC)_(2)]_(n)(JXUST⁃16)。借助单晶X射线衍射、粉末X射线衍射、热重分析等对其进行了结构表征。在JXUST⁃16中,相邻的Cd^(Ⅱ)离子通过羧酸配体NDC_(2)-桥联形成对称三核Cd^(Ⅱ)簇,由此延伸形成一维链,相邻的一维链进一步通过DDBD桥联形成三维结构。JXUST⁃16能稳定存在于有机溶剂和不同pH值水溶液中,且阴离子荧光传感实验表明:JXUST⁃16能够作为一种双功能荧光传感器识别MnO_(4)^(-)和H_(2)PO_(4)^(-)。此外,MnO_(4)^(-)因吸收竞争机制对JXUST⁃16表现出荧光猝灭效应;H_(2)PO_(4)^(-)对JXUST⁃16具有一定红移和荧光增强效应,其荧光增强可用吸收增强机制解释。
A 3D Cd^(Ⅱ)⁃based coordination polymer with the formula of[Cd_(2)(DDBD)(NDC)_(2)]_(n)(JXUST⁃16)has been solvothermally synthesized by using 4,7⁃bis(1H⁃1,2,4⁃triazol⁃1⁃yl)⁃2,1,3⁃benzothiadiazole(DDBD)as the primary ligand and 1,4⁃naphthalenedicarboxylic acid(H_(2)NDC)as the auxiliary ligand,and structurally characterized through single crystal X⁃ray diffraction,powder X⁃ray diffraction,thermogravimetry analysis,etc.JXUST⁃16 belongs to the monoclinic I2/a space group and the adjacent Cd^(Ⅱ)ions are bridged through the carboxylate ligand NDC_(2)-to form a symmetrical trinuclear Cd^(Ⅱ)cluster,which extends to obtain a 1D chain.The neighboring 1D chains are further linked by DDBD to form a 3D structure.JXUST⁃16 could keep stable in organic solvents and aqueous solutions with different pH values,and be used as a dual⁃function fluorescence sensor to identify MnO_(4)^(-)and H_(2)PO_(4)^(-)with obvi⁃ous naked⁃eye recognition under a 365 nm UV lamp.In addition,MnO_(4)-showed a turn⁃off effect on the fluorescence of JXUST⁃16 due to the competitive absorption mechanism;while H_(2)PO_(4)^(-)had a certain redshift and turn⁃on effect on the fluorescence of JXUST⁃16,which can be explained by the absorbance⁃caused enhancement mechanism.CCDC:2174537.
作者
李亚平
张晓霞
邱成强
刘遂军
LI Ya-Ping;ZHANG Xiao-Xia;QIU Cheng-Qiang;LIU Sui-Jun(School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China;School of Chemistry and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2022年第10期1948-1958,共11页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.22061019)
江西省自然科学基金(No.20202ACBL213001)资助。
关键词
双三氮唑基苯并噻二唑
配位聚合物
晶体结构
阴离子荧光传感
bistriazolyl benzothiadiazole
coordination polymer
crystal structure
anions fluorescence sensing
