催化荧光动力学分析法及新型双波段光能转换复合材料的研究

【作者】 韩芳；

【导师】 唐波；

【作者基本信息】 山东师范大学 ， 分析化学， 2001， 硕士

【摘要】 近年来，有一种定量检测分析法以其高灵敏度、准确度及选择性在定量分析化学领域中倍受关注，成为检测痕量组分的有力手段，这就是催化荧光动力学分析法。催化荧光动力学分析法是荧光动力学分析法的主要类型，它是以催化反应为基础来测定物质含量的方法。由于测量对象并非被测物本身，而是经“化学放大”了的其它物质，因而此法的灵敏度很高，检测限可达ng级或pg级。 依据催化荧光动力学分析法所具有的高灵敏度这一显著优点，针对以往运用该法对过渡金属元素尤其是贵金属元素的检测所用指示剂较陈旧这一现状，本文合成了一类新颖的荧光特效腙类试剂，并基于它们的氧化-还原反应，运用催化荧光动力学分析法对痕量过渡金属元素，尤其是贵金属元素进行了检测。具体为：合成并运用邻香草醛水杨酰腙成功地测定了人工合成样及矿样中锇的含量；合成并运用水杨醛对硝基苯甲酰腙成功地测定了人工合成样及矿样中铱的含量；运用邻羟基萘醛水杨酰腙成功地测定了人发、小麦粉及水样中锰的含量。 当今社会处于知识经济的时代，科学技术是第一生产力，如何把科学技术转化为生产力、实现其经济效益和社会效益是每一位科学工作者的责任。本文在对催化荧光动力学分析法这一基础理论进行应用研究的同时，对高科技农业领域里的光能转换薄膜材料也进行了深入的研究，具体为：针对目前添加了光能转换材料的薄膜单纯发红光或蓝光这一现状，根据红光及蓝光成分增加时，光合作用增强原理，着手研究290-400nm近紫外区有宽带吸收，450-480nm（蓝区）及600-650nm（红区）有发射的新型双波段光能转换薄膜复合材料。 取得的阶段性进展为：合成吸收近紫外光，发蓝光或红光的高效光能转换材料各一种，通过结构表征确定了它们的组成，并对它们的某些物理化学 山东师范大学硕士论文一”性质进行了研究；这两种光能转换材料的最突出优点是其发射蓝光或红光波段，与叶绿素所吸收的蓝光或红光波段相接近，若将它们复合成为薄膜材料，必将加强农作物的光合作用。通过荧光光谱测试分析，研制出一种适合植物光合作用所需蓝光、红光强弱比例的复合发光材料中这两种光能转换材料的配比。更多还原

【Abstract】 Catalytic kinetic fluorimetry is an attractive powerful way to determine trace amounts of component because of its high sensitivity, accuracy and selectivity. It is based on catalytic reaction to determine the contents of substances and becomes the main type of kinetic fluorimetiy. Because the measured objects are not determinands but other 揷hemically amplified?substances, the sensitivity of the method is very high with the detection limit down to levels of ppb or ppt. In previous application of this method to the determination of transition metals especially noble metals, the indicator reagents are relatively obsolete. Aiming at this state, we synthesized a novel kind of specific fluorescent hydrazone reagents, and applied them as indicator reagents in the determination of transition metals especially noble metals. Such as: O-Vanillin Salicyloylhydrazone and Salicylaldehyde P-Nitro-Benzoylhydrazone were synthesized and applied successfully to the determination of osmium and iridium in synthetic mixtures and mineral samples respectively; 2-Hydroxy- 1 -Naphthaldehyde Salicyloylhydrazone was applied successfully to the determination of manganese in human hair, wheat powder, lake water and tap water. Nowadays, society is in the epoch of intellectual economy. Science and technology is the first productivity. To transform science and technology into productive force, and realize its economical and social merit are the burden duties of every scientific worker. As we engaged in the research of applying catalytic kinetic fluorimetry to the real determinations, we also went in for a deep research of light energy transforming film material in the field of high-tech agriculture. Now, films that are added with light energy transforming material, emit red light or blue light singly. Photosynthesis will be strengthened when the component of 4 both red light and blue light increases. Based on this principle, we engaged in the research of novel dual-wave band light energy transforming film composite, which can absorb 290 ?400nm near ultraviolet region and emit in the regions of 450 ?480nm (blue region) and 600 ?650nm (red region). Our stage progresses are: Two kinds of novel and effective light energy transforming material, which can absorb near ultraviolet light and emit blue or red light, have been synthesized and characterized. The compositions of them were confirmed, and some properties of them were studied. The most outstanding merit of the light energy - transfonning material is that the blue or red band they emit is close to the blue or red band chlorophyll absorbs. If they are added in film as composite, the photosynthesis of crops will strengthened greatly. The proportion of aforementioned two light transforming material, which well meets crops?needs for red and blue light, has been studied by spectrofluorimetry.更多还原