Synthesis and Photophysical Properties of Luminescent Lanthanide Complexes Based on Coumarin-3-carboxylic Acid for Advanced Photonic Applications

摘要

Recently,luminescent lanthanide complexes have attracted much attention because of their academic interests as well as potential utility of this technology in a wide variety of photonic applications such as planar waveguide amplifiers,plastic lasers,and light-emitting diodes.In most cases,luminescent lanthanide complexes consist of a lanthanide ion and its chelating luminescent ligands as a sensitizer,which can transfer excitation energy to the encapsulated lanthanide ion.The luminescent ligand is generally referred to as the antenna chromophore,in analogy to the light-harvesting center in photosynthetic reaction center.They efficiently absorb and transfer lights to the central lanthanide ions through the energy transfer.The central lanthanide ions accumulate lights from the antenna chromophores.To date,however,luminescent lanthanide complexes were not developed in specific references to luminescent lanthanide complexes.Such efforts are just in the early stage and not only the basic concept not established,but also the structure-property relationship is not yet clearly understood.