發(fā)布時間：2018-06-02 15:46

  本文選題：咔唑 + 席夫堿��； 參考：《東北師范大學(xué)》2017年碩士論文

【摘要】：微量元素對于維持人類的正常生命活動具有重要的作用。微量元素含量過高或缺乏都會對人體造成危害。所以如何快速的檢驗金屬離子的含量就顯得尤為重要。由于熒光化學(xué)傳感器不僅可以高效、精確、低成本的檢測金屬離子,還具有良好的電子轉(zhuǎn)移特性,所以近年來越來越多的科學(xué)家將目光轉(zhuǎn)向熒光化學(xué)傳感器。本論文主要介紹了以下兩部分內(nèi)容:首先,我們合成了一種新型的熒光化學(xué)傳感器2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亞甲基)氨基)馬來腈(傳感器1)。其中,用咔唑作熒光基團(tuán),以2,3-二氨基順丁烯二腈為識別基團(tuán)。采用紅外、質(zhì)譜、核磁等技術(shù)措施表征了傳感器1。傳感器1可以選擇性的識別Cu2+,表現(xiàn)為熒光增強(qiáng)。而加入其他的金屬離子:K+,Ag+,Mn2+,Co2+,Ni2+,Zn2+,Cd2+,Pb2+,Mg2+,Ca2+,Sr2+,Ba2+,Hg2+,Fe2+,Fe3+,Al3+和Cr3+,不會對傳感器1的熒光光譜造成顯著影響。通過測試我們得到傳感器1與Cu2+的絡(luò)合比為1:1,絡(luò)合常數(shù)為1.35×106 M-1,檢測限為2.74×10-8 M。其次,在2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亞甲基)氨基)馬來腈(傳感器1)的基礎(chǔ)上,我們合成了另一種新的化學(xué)傳感器2-氨基-3-((Z)-((9-己基-9H-咔唑-3-基)亞甲基)氨基)-3-((Z)-((9-己基-9H-咔唑-3-基)亞甲基)氨基)馬來腈(傳感器2)。經(jīng)過紅外、核磁、質(zhì)譜等技術(shù)措施對其進(jìn)行了表征。傳感器2能夠選擇性的辨別Fe3+,呈現(xiàn)出熒光淬滅現(xiàn)象。而加入其他金屬離子,不會對傳感器2的熒光光譜造成顯著影響。通過測試得到傳感器2與Fe3+的絡(luò)合比為1:1,絡(luò)合常數(shù)為7.98×106 M-1,檢測限為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.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O657.3;TP212

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本文編號：1969321