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一种1,8-萘啶类红光化合物的合成、分离及铜(Ⅰ)配合物的合成研究
【作者】 尹琦;
【导师】 傅文甫;
【作者基本信息】 云南师范大学 , 物理化学, 2004, 硕士
【摘要】 发光材料在人们的日常生活以及通讯、显示、记录、生物分子探针等高科技领域都已经被广泛地应用,尤其在信息时代的今天,满足各种信息显示需求的发光材料更是得到了迅猛发展。由于有较高的发光效率和宽的发光颜色范围,有机发光材料已经引起了人们巨大的研究兴趣。其中,具有生物活性的1,8-萘啶类化合物由于其良好的荧光性质,也得到了有机化学家和材料学家的关注。本文主要就一种1,8-萘啶类红光物质的合成及分离进行研究。 通过设计并进行一系列条件不同的反应,我们对此红光物质的合成、分离进行了探索性研究。研究表明,酸化过程对萘啶类化合物的反应可以产生很大的影响。未酸化的2-甲基-1,8-萘啶在Ac2O条件下与苯甲醛反应生成2-苯乙烯基-1,8-萘啶,2-苯乙烯基-1,8-萘啶可以发射蓝光。但是当2-甲基-1,8-萘啶经酸化后生成N-H类季铵盐,该季铵盐可以在Ac2O条件下与过量的苯甲醛反应生成两种具有良好荧光性质的红光物质。研究证明,空气中的O2对红光物质的生成没有影响,并且这两种红光物在空气中均较稳定。但是这两种红光化合物与硅胶存在较强的吸附作用,并且它们的极性、溶解性、升华等性质极为相似,这些都为分离工作制造了障碍。 目前我们已经得到了其中一种较纯的红光化合物,并对其进行了UV-Vis、IR、MS光谱测试。经过谱图分析,我们已经初步推测出其可能的结构。从两种红光物的UV-Vis光谱可以看出,它们应该都具有较2-苯乙烯基-1,8-萘啶大的共轭体系;从IR光谱和质谱中可以知道,该红光物应该不具有羰基、羟基;从FL光谱中可以知道它具有较好的荧光性质,色纯度较好。 同时,我们也合成得到了两种Cu (Ⅰ)的单核多膦配合物[Cu(tdpme)(Phen)O]BF4(1) (tdpme=1,1,1-tris(diphenylphosphinomethyl) ethane,Phen=邻菲哕啉)和[Cu(tdpme)(PPh3)]BF4(2),并通过X-单晶衍射确定了它们的晶体结构,其中中心离子Cu(Ⅰ)为四配位,它们的几何构型均为典型的四面体型。在UV-Vis光谱中,配合物(1)在λ=269nm处有最大吸收,在λ=410nm处有弱吸收,此弱吸收源于金属到配体的MLCT跃迁;配合物(2)在λ=267nm 云南师范大学硕士学位论立2。。4处有最大吸收。溶剂的极性对两种配合物的吸收光谱均有很大的影响:随着溶剂极性的增加,吸收减弱;其摩尔消光系数随溶剂极性的增加,明显降低。配合物(l)固体具有较强的发光性能,在入。m=58Onln处有最大发射,此低能发射可以归属为金属到配体的MLCT跃迁。
【Abstract】 Luminescence materials have achieved much attention and play an important role in top-tech areas such as communication, display materials and recording materials. To meet the requirements in different fields, many kinds of luminescence materials including inorganic, organic and polymer luminescence materials have been synthesized and reported. Organic luminescence materials, due to their high efficiency and the wide range of the luminescence spectra, have attracted more attention. Among these organic materials, naphthyridines, which show good biological activities and are mainly used in medicines, are being focused on owing to their good fluorescence properties. In this paper, our study is mainly about the synthesis and purification of one kind of naphthyridines. This compound can emit bright red light.Via designing a series of reactions, we investigated the exploratory research on the synthesis and purification of the compound. It is found,that H+ may greatly influence the reactions about naphthyridines. After 2-methyl-l,8-naphthyridine has been acidified, a quaternary N-H derivative is formed. With excessive benzaldehyde under Ac2O, the derivative may gives two products which both take on good fluorescence properties. One of them has been acquired. By analyzing its spectrums of UV-Vis, IR and MS, we have gained its possible structure. In the spectra of UV-Vis, it is speculated that there is a large conjugated system. In the spectra of FL, it is found that the product radiates highlighted red emission, and the color is saturated.Besides, two copper(I) complexes, [Cu(tdpme)(PhenX)]BF4(1) and [Cu(tdpme)(PPh3)]BF4(2), have been synthesized. The complexes were characterized by single-crystal X-ray analysis, UV-Vis spectrum and luminescence spectrum. They show that both complexes are distorted tetrahedral geometry.
【Key words】 Naphthyridines; fluorescence properties; red emission; synthesis; purification; H~+; Cu (I); mononuclear; complexes;
- 【网络出版投稿人】 云南师范大学 【网络出版年期】2005年 01期
- 【分类号】O626;O641.4
- 【下载频次】245