| Organic electroluminescence is now recognized as an essential modern display technique due to its low operating voltage, excellent emitting property and wide visual angle, etc. It has attracted many interests for potential applications in large-screen flat-panel and full-color displays. During the last decade, rapid progress in both theory and practice has been made, and the production is coming into market. By using different organic materials, people have light emission of different colors, low molecular weight materials become the "star" materials in organic electro-luminescent.A serial of soluble Schiff bases and their Zn complexes functionalized with electron-donor groups were synthesized, characterized and evaluated for use in electroluminescence devices. The optical properties of these materials have been successfully manipulated with increasing conjugated structures. The electroluminescence devices ITO/PVK:materials/BCP/ALq3/LiF/Al were fabricated by spin coating the blend of a polymer PVK and the materials with precise doping ratio. These preliminary results illustrated that this kind of complexes can be new candidates for light emitting diodes.Two dinucleus Schiff bases and their Zn complexes were synthesized. The crystalline structure was determined from X-ray diffraction data. The optical properties of these materials have been studied by compared with similar structures.
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