Synthesis And Photo-electrical Properties Of A Novel Bis-β-ditone Ligand And Its Rare Earth Complexes

The β-ditones and the match thing of its derivativeses be the new multi-functional materials in the metals organic LCD, the extract reagent, the chemical shift reagent and the defend false material, etc. have already caused the widespread interesting. Recently, it is discovered that P-ditones compounds have Photoluminescence(PL) and Electroluminesence ( EL) flaring dual properties, can also take place the certain interaction with gene, and have good applied foreground to the development of the new multi-functional materials. The rare earth metal complexes have an efficiency high PL, the monochrome good light, the higher stability, the bigger Stock shift many advantages and so on, making it be the EL materials to show the captivating foreground.In this thesis, we try to incorporate functionality from both inorganic and organic components through the formation of hybrid organic-inorganic materials, and develop a new approach in synthesizing the high PL & EL activity materials. The main points are summarized as follows:1. A kind of new D-Ï€-D structure bis- P -ditone of the PL & EL activity organic ligand H₂BPOEC (3,6-bis(3-phenyl-3-oxopranoyl)-9-Ethylcarbazole) was synthesized and its synthetic conditions and the reaction mechanism were discussed.2. Single crystals of the bis- P -ditone organic ligand were obtained, which belongs to Orthorhombic system, P2₁2₁ space group. The molecule, existing in the enol-form resonance structure, presents the triangle to flying saucer with a body and two wingses being almost in one plane. The molecule line-sizes reach to nano-scale alongthe two-dimensions.3. Fourteen kinds of highly luminescent of triple stranded, dinuclear lanthanide complexes, the rare earth metal Ln-bis- P -ditone complexes in the form of Ln2L3 were synthesized and further characterized by IR, 'l-TNMR, El, elemental analyses etc.4. Line optical properties of the bis-P-ditone and Ln2L3 complexes were studied. The relationships between their structure and properties have been discussed. The inner emission mechanisms behaving in form of sharp red light( the half peak width only within 7 nm) at 613 nm for Eu3+-bis-P-ditone complex were also discussed. It is discovered that Y3+ -bis- P -ditone gives out red light by PL in the 610nm. The new phenomenon gives us suggestion that the complex may act as a potential novel red light material in future. The electron chemical properties and the possible reaction mechanisms on electrode for the ligand have been put forward.5. Space structure and UV-Vis spectra of the H2BPOEC ligand were investigated according to theoretical calculation methods using the density functional theory (DFT). It is fitted very well comparing the calculation result from DFT theory with the experiment data of the ligand. At the same time, Some difference existed are reasonably analyzed.