【作者】 陈华龙；

【导师】 金京一； 吴学；

【作者基本信息】 延边大学 ， 物理化学， 2010， 硕士

【摘要】 如今,随着经济的发展和社会的进步,越来越多的人意识到环境对经济、社会发展和人民生活质量提高的重要性,而工业化的发展尤其是重工业的发展对水体、大气以及生物体带来不同程度的影响,各种污染严重威胁着人们的生活。因此,方便快速的检测对水体、大气及生物体的有害物质成为各领域学者们研究的焦点。随着人们对于荧光化合物认识的逐渐深入,人们发现探针的分子结构和环境对其光谱行为以及发光强度都会带来规律性的影响,故而人们在设计荧光传感器分子时,常常通过化学手段对探针进行分子结构上的修饰,以期获得新的探针达到更为优良的检测效果。本文设计合成的2-(10-氯代蒽基-)-5-(2-吡啶基)-1,3,4-噻二唑在紫外下显示明亮的黄绿色荧光,同时测试显示其在微摩浓度下对Fe3+有比率荧光选择性,并表现出很高的专一性,质谱测试也反映出荧光分子与Fe3+是1：1的配位模式；而本文设计并合成得到的另一类分子：4-(9-蒽基)-2-(2-吡啶基)噻唑在紫外下显示出明亮的蓝紫色荧光,荧光测试也显示其对Cu2+、Hg2+和Fe3+具有很好的比率荧光选择性。其中Cu2+、Hg2+猝灭的是蒽部分的荧光发射,而与之正好相反的是Fe3+却猝灭的是吡啶-噻唑部分的荧光发射；同时在水中时,噻唑的荧光较甲醇中增强了近1000倍,而进一步加入各种金属离子时体系荧光又有不同程度的猝灭,故本部分以H20和各种金属离子(Mn+)为两个输入信号,以噻唑的特征荧光发射作为输出信号,构建了一个典型的双输入INH(抑制型)荧光分子逻辑门。更多还原

【Abstract】 Nowadays,with the development of economy and the progress of society, more and more people realize the importance of environment to the development of economy and the quality of people’s life.The development of industry, especially heavy industry brought impact on waters,atmosphere and organisms and people’s life are threatened seriously. So a rapid and convenient method for the detection of hazardous materials in the waters,atmosphere and organs becomes the focus of scientists of all fields.As people gradually for the fluorescent compounds-depth understanding,it was discovered the molecular structure and probe environment and the luminous intensity of their spectral behavior will bring the law in effect,when people design the fluorescent sensor molecules,they often modify the molecular structure of probe in order to obtain new probes to be better detection results.Using the simple approach, the following two kinds of new compounds were prepared:2-(10-chloroanthracen-9-yl)-5-(pyridin-2-yl)-1,3,4-thiadiazole and 4-(anthracen-9-yl)-2-(pyridin-2-yl)thiazole.The former probe,emitting yellow-green fluorescence under the ultraviolet light,showed a high ratiometric fluorescent selectivity to iron(Ⅲ) without interferences of the background metal ions.The latter molecule was synthesized and characterized and the absorption spectra and the effects of metal ions on the fluorescent intensity were studied.The experimental results showed that fluorescence intensity decreased upon addition of twelve kinds of metal ions to different extent in methanol solutions,while the quenched behaviors of Cu2+, Hg2+and Fe3+were exceptional.In neutral aqueous solutions,the fluorescent intensity of system enhanced approximately 1000-fold than previous conditions. On the basis of these studies, an INH fluorescent molecular logic gate was fabricated with H2O and metal ions (Mn+) inputs and with emission of APT as the output signal.更多还原