新型有机无机杂化及有机共轭光限幅材料的合成及性能分析-synthesis and performance analysis of novel organic-inorganic hybrid and organic conjugated optical limiting materials.docx

关键词：二苯乙烯、偶氮苯、POSS、聚炔、光限幅、非线性光学AbstractWith the rapid development of new laser technology, the optical limiting (OL) materials for protection of optically sensitive devices and human eyes from laser damage in both civilian and military applications in recent years have attracted significant attention. The existing OL materials still have some shortages, such as low thermal stability and optical limiting property, small three-order nonlinear optical (NLO) susceptibility; the relationship between molecular structure and OL property is still not clearly understood; there are difficulties in synthesizing new OL materials. Therefore, it’s very important to explore OL materials with wide-band, high transmission in visible optical region, and rapid response time. Stilbene and azobenzene derivatives are good NLO chromophores due to their long π-electronconjugated structures. Based on nonlinear optical theory, we designed and synthesizedseries of conjugated polyacetylenes and POSS-based organic/inorganic molecules hybrid materials containing stilbene and azobenzene NLO chromophores, respectively, and investigated the relationship between the molecular structure and OL properties. The main contents of this dissertation consist of the following points:The principle of nonlinear optical and the testing methods of OL and their recent development were systematically reviewed.Considering the structure characteristics of POSS and polyacetylenes, we designed and synthesized eight stilbene or azobenzene-containing terminal acetylene monomers. Their molecular structures were characterized by FTIR, 1H NMR, 13C NMR and EA (elemental analysis). Phase-transfer catalysis (PTC) approach was applied to Wittig reaction to synthesize stilbene derivatives, and it was found that the use of water/dichloromethane non-homogeneous system as solvent offered mild reaction conditions and simple post-processing. In Sonogashira reaction, it was found that NEt3/DMF mixed solvent favors to carry on reaction