Research On The Synthesis,Structural Identification And Luminecence Of Lanthanide Metal-β-Diketone-1, 10-Phenanthroline Ternary Chelates

Organic electroluminescent (OEL) materials have become anew and fascinating area of research in recent years. The researchstatus and development of organic electroluminescent materials arereviewed in detail in this paPer. Lanthanide metal chelates are a kindof electroluminecent materials with special light and physicalproperties among many OEL materials. They have received more andmore attention from many investigators for high fluorescenceefficiency, narrow bandwidth, good purity of light.We have prepared the first ligand, l-benZyl-3-methyl-4(benzoyl-5-pyrazolone using dichloro ed for all alllH methyl-5-pyrazolone .From l,l0-phenallthroline, we haveprepared 5-acrylamido-l, l0- phenanthroline (5-a-l, l0-phen),thesecond ligand, through nitfation, reduction and acylation reactionwith acryloyl chloride. Then we have prepared their eight lanhanidemetal derivatives ternary solid complexes. They and5-acrylamido-l,10-phenanthrolin there are nine novel comPoundswhich have not been reported so far. All these compounds have beenidentified through IR, UV lH NMR, and MS. These complexes allhave the comPosition of Ln(PMBP)3(5-a-l, l0-phen) (Ln=La, Pr, Nd,Eu, Tm, Yb); We have determined the physical properties about themolar conductivity solubility and thermal stability of the complexes;We have studied on the fluorescence excitation and emissionspectrum of the temary solid complexes and found that alI of themabsorb ultraviolet and emit violet visible ligh and their stfCngth, isobviously strengthened,especial that of La, Nd, Eu, Dy chelates. Thebandwidth is narrower, that is that the purity of light is high.According to photoluminescence (fluorescence spectrum), we havediscussed their electroluminecence and calculated they are a kind ofemitting-light materials with transport properties. If they are used inEL devices they can be used emitting layer materials and emit violetlight.