咔唑席夫碱的荧光化学传感器的制备和性能

发布时间：2018-06-02 15:46

本文选题：咔唑 + 席夫碱　；参考：《东北师范大学》2017年硕士论文

【摘要】：微量元素对于维持人类的正常生命活动具有重要的作用。微量元素含量过高或缺乏都会对人体造成危害。所以如何快速的检验金属离子的含量就显得尤为重要。由于荧光化学传感器不仅可以高效、精确、低成本的检测金属离子,还具有良好的电子转移特性,所以近年来越来越多的科学家将目光转向荧光化学传感器。本论文主要介绍了以下两部分内容:首先,我们合成了一种新型的荧光化学传感器2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亚甲基)氨基)马来腈(传感器1)。其中,用咔唑作荧光基团,以2,3-二氨基顺丁烯二腈为识别基团。采用红外、质谱、核磁等技术措施表征了传感器1。传感器1可以选择性的识别Cu2+,表现为荧光增强。而加入其他的金属离子:K+,Ag+,Mn2+,Co2+,Ni2+,Zn2+,Cd2+,Pb2+,Mg2+,Ca2+,Sr2+,Ba2+,Hg2+,Fe2+,Fe3+,Al3+和Cr3+,不会对传感器1的荧光光谱造成显著影响。通过测试我们得到传感器1与Cu2+的络合比为1:1,络合常数为1.35×106 M-1,检测限为2.74×10-8 M。其次,在2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亚甲基)氨基)马来腈(传感器1)的基础上,我们合成了另一种新的化学传感器2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亚甲基)氨基)-3-((Z)-((9-己基-9H-咔唑-3-基)亚甲基)氨基)马来腈(传感器2)。经过红外、核磁、质谱等技术措施对其进行了表征。传感器2能够选择性的辨别Fe3+,呈现出荧光淬灭现象。而加入其他金属离子,不会对传感器2的荧光光谱造成显著影响。通过测试得到传感器2与Fe3+的络合比为1:1,络合常数为7.98×106 M-1,检测限为3.75×10-8M。
[Abstract]:Trace elements play an important role in maintaining the normal life activities of human beings. Trace element content is too high or lack can cause harm to human body. Therefore, how to quickly test the content of metal ions is particularly important. Because fluorescent chemical sensors not only can detect metal ions with high efficiency, accuracy and low cost, but also have good electron transfer characteristics, more and more scientists have turned their attention to fluorescent chemical sensors in recent years. The main contents of this thesis are as follows: firstly, we have synthesized a new fluorescent chemical sensor 2-Amino-3-Amino (2-Amino-3-Amino) -1-hexyl-9-hexyl-carbazole-3-methylene-amino) maleonitrile (sensor 1). Carbazole was used as fluorescence group, and 2 o 3-diamino maleic dinitrile was used as recognition group. The sensor was characterized by IR, MS and NMR. Sensor 1 can selectively recognize Cu2, which is shown as fluorescence enhancement. However, addition of other metal ions, such as: K ~ (+) Ag ~ (2 +) mn _ (2) O _ (2) O _ (2) Ni _ (2) Zn _ (2) O ~ (2 +) CD _ (2) O _ (2) Pb _ (2) O _ (2) O _ (2) Ca ~ (2 +) H _ (2) H _ (2) O _ (2) H _ (2) (H _ (2) The complex ratio of sensor 1 to Cu2 is 1: 1, the complexation constant is 1.35 脳 106M-1, and the detection limit is 2.74 脳 10-8M. Secondly, on the basis of 2-amino-3-pyrrolidene, 9-hexyl-9H-carbazole-3-methyl) amino) maleonitrile (sensor 1), We have synthesized another new chemical sensor, 2-Amino-3-Amino (2-Amino-3-Amino) Amino (2-Amino-3-Aminomethyl) Amino) Maleonitrile (Sensor 2. It was characterized by IR, NMR and MS. Sensor 2 can selectively distinguish Fe3, showing fluorescence quenching phenomenon. The addition of other metal ions will not have a significant effect on the fluorescence spectra of sensor 2. The complex ratio of sensor 2 to Fe3 is 1: 1, the complexation constant is 7.98 脳 106M-1, and the detection limit is 3.75 脳 10-8M.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O657.3;TP212

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