Synthesis And Fluorescence Of Complexes Based On Quinoline

In recent years,metal coordination compounds especially metal cluster compounds and metal organic framework compounds have become a key research object in coordination chemistry field.Metal cluster compounds and metal organic framework materials have got more and more attention applying in catalysis,materials,sensing fields.8-hydroxyquinoline is excellent metal-chelator and luminescent materials,can form wonderful luminescent complexes and can emit in different colors of light,so building new-style quinoline metal coordination compound,and studying its potential applications in optical become one of research directions in this topic.Luminescent MOFs are certainly very promising multifunctional materials for chemical sensors,light-emitting devices,and biomedicine.Because of the highly regular channel structures and controllable pore sizes,the MOFs can also serve as rigid and flexible hosts for the encapsulation of the guest luminescent species such as lanthanide ions and fluorescent dyes and fluorescent clusters.The guest-induced luminescence makes some luminescent MOF materials suitable for molecular detection and environmental probing.In this paper,four new transition metal coordination compounds based on 8-hydroxyquinoline have been successfully obtained under solvothermal,and accompanied by in suit synthesis of new ligands.Compound 1,3 and 4 exhibit good fluorescence properties.Compound 1 demonstrate high sensitive sensing of Zn²⁺ in methanol solvent through luminescence enancement along with the red shifts at 524 nm.MS data confirm chromophore of 524 nm is[Zn₂?HL?₃]⁺ cations.The chromophore is further introduced to construct a dual-emissive luminescent mate rials [Zn₂?HL?₃]⁺@MOF-5 by encapsulating[Zn₂?HL?₃]⁺ cations in the pores of MOF-5 by “on pot” method.The dual-emissive MOFs based on two emissions of MOF-5 at 397 nm and [Zn₂?HL?₃]⁺ at 524 nm could selectively sense AlIII ions and ethanol amine and MOF-5 sever as a barrier for protecting guest molecular.