Preparation And Properties Of Eu,Tb-compliexes/LDH(α-ZrP)hybrid Luminescent Materials

Lanthanide complexes display potential applications in many fields such as photoelectric,lighting,sensing,due to the integrity of unique optical properties such as sharp and characteristic emissions,and long excited state lifetimes.Yet,lanthanide complexes possess poor photo and thermal stability,which limit their practical application on many aspects.It is well known that inorganic layered materials,have good light stability and thermal stability,and the shape and size of the interlayer can be adjusted,while functionalization can be performed when the guest molecules are intercalated.In this work,we mainly discuss synthesis of organic-inorganic hybrid luminescent materials by electrostatic interaction of lanthanide complexes intercalation into inorganic layered materials.These materials not only can integrate effectively the excellent luminescence properties of lanthanide complexes but also can exert good light and thermal stability of inorganic matrix and can be applied in metal ions and small molecule sensing.1、Highly transparent ultrathin films（UTFs）based on alternative layer-by-layer assembly of Eu-and Tb-based lanthanide complexes（LCs）and Mg-Al-layered double hydroxide（LDH）nanosheets are designed herein.UV-visible absorption and fluorescence spectroscopy showed an orderly growth of the two types of ultrathin films upon increasing the number of deposition cycles.AFM and SEM measurements indicate that the films feature periodic layered structures as well as uniform surface morphology.Luminescent investigations reveal that（LCs/LDH）n UTFs can detect Fe³⁺with relative selectivity and high sensitivity.2、We design the direct ion exchange of luminescent LCs into the gallery spaces ofα-ZrP without any pretreatment with polar organic molecules.The obtained intercalation compounds were characterized FTIR spectroscopy,XRD,TEM,SEM,TGA,Photoluminescence spectroscopy.Luminescent intercalation composites exhibit expanded layer distance and higher thermal-and photostability.Moreover,we report a simple,effective and robust luminescent sensor for detecting organic amines based on the above materials.Luminescent investigations reveal that ZrPA can detect ethylenediamine（En）vapors with relative selectivity and high sensitivity.