Herein we report a covalent cage TPE-Zn_(4)based on a tetraphenylethylene molecule via subcomponent self-assembly,which is templated by zinc ions.TPE-Zn_(4)features a quadrangular prismatic cage structure,which is cha...Herein we report a covalent cage TPE-Zn_(4)based on a tetraphenylethylene molecule via subcomponent self-assembly,which is templated by zinc ions.TPE-Zn_(4)features a quadrangular prismatic cage structure,which is characterized by NMR,mass spectrum,and single-crystal X-ray diffractions.TPE-Zn_(4)emitted orange fluorescence(λ_(em)=620 nm)in DMSO solution under the irradiation of UV light(λ_(ex)=395 nm)and can be applied as a fluorescence sensor for selectively detecting Pd^(2+).The fluorescence of TPE-Zn_(4)was quenched by Pd^(2+)in DMSO solution,and a very low detection limit of 62.3 n M was achieved.Mechanism studies reveal that the Pd^(2+)can replace the Zn^(2+),and the heavy atom effect and chelation-enhanced quenching effect between the Pd^(2+)and the cage probably cause the fluorescence quenching.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21731002,21871172 and 22171106)the Guangdong Major Project of Basic and Applied Research(No.2019B030302009)+4 种基金the Fundamental Research Funds for the Central Universities(No.21622103)Guangdong Natural Science Foundation(No.2022A1515011937)Guangzhou Science and Technology Program(No.202002030411)the China Postdoctoral Science Foundation(No.2022M711327)Jinan University。
文摘Herein we report a covalent cage TPE-Zn_(4)based on a tetraphenylethylene molecule via subcomponent self-assembly,which is templated by zinc ions.TPE-Zn_(4)features a quadrangular prismatic cage structure,which is characterized by NMR,mass spectrum,and single-crystal X-ray diffractions.TPE-Zn_(4)emitted orange fluorescence(λ_(em)=620 nm)in DMSO solution under the irradiation of UV light(λ_(ex)=395 nm)and can be applied as a fluorescence sensor for selectively detecting Pd^(2+).The fluorescence of TPE-Zn_(4)was quenched by Pd^(2+)in DMSO solution,and a very low detection limit of 62.3 n M was achieved.Mechanism studies reveal that the Pd^(2+)can replace the Zn^(2+),and the heavy atom effect and chelation-enhanced quenching effect between the Pd^(2+)and the cage probably cause the fluorescence quenching.
