通过碳点的介导极化对p-nitroaniline进行选择性鉴定
Feng Li1, Kai-Qi Liu1, Wen-Juan Wang1
1School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China. wangwenjuan-1984@163.com.
The Analyst
|January 12, 2024
概括
,编的碳点 (BBCN) 提供了一种新的度方法,用于检测废水中的p-nitroaniline (PNA). 这种选择性方法利用介导的偏振来准确量化PNA.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 废水分析需要有机污染物的敏感和选择性检测方法.
- 碳点 (CD) 是新兴的纳米材料,具有可调节的光学特性,用于传感应用.
- 开发有效的探针,以检测像p-nitroaniline (PNA) 这样的酸芳香化合物,对于环境监测至关重要.
研究的目的:
- 开发一种新的度方法,用于在废水中高度选择性地检测p-nitroaniline (PNA).
- 调查和化物在碳点中兴奋剂的作用,以提高传感能力.
- 建立一个敏感和可靠的平台,用于环境样本中PNA的测定.
主要方法:
- ,化编的碳点 (BBCN) 的合成.
- 基于光火和红移检测PNA检测的度测试的开发.
- 描述BBCN及其与PNA的相互作用机制.
- 在废水样本中检测PNA的方法的验证.
主要成果:
- 开发的BBCN在PNA的存在下表现出高度选择性的光火和红移.
- 兴奋剂增强了BBCN的分子极化性,促进了与PNA的选择性相互作用.
- 该方法实现了0.5300μM的优异线性范围,以及PNA的0.24μM的低检测极限.
- 对于PNA,其同位素 (o-nitroaniline和m-nitroaniline) 观察到更高的选择性.
结论:
- ,和合物合的碳点为度PNA检测提供了一个高度选择性和敏感的平台.
- 该研究强调了兴奋剂元素对光材料光学和物理化学性质的重大影响.
- 这种方法为监测废水和环境样本中PNA污染提供了一个有前途的工具.
相关概念视频
02:46Halogenation of Alkenes
15.6K
Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
15.6K
01:15Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
8.1K
Chlorination and bromination are important classes of electrophilic aromatic substitutions, where benzene reacts with chlorine or bromine in the presence of a Lewis acid catalyst to give halogenated substitution products. A Lewis acid such as aluminium chloride or ferric chloride catalyzes the chlorination, and ferric bromide catalyzes the bromination reactions. During the bromination of alkenes, bromine polarizes and becomes electrophilic. However, in the bromination of benzene, the bromine...
8.1K
01:20Electrophilic Aromatic Substitution: Nitration of Benzene
6.0K
The nitration of benzene is an example of an electrophilic aromatic substitution reaction. It involves the formation of a very powerful electrophile, the nitronium ion, which is linear in shape. The reaction occurs through the interaction of two strong acids, sulfuric and nitric acid.
6.0K
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
6.0K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
6.0K
01:11ortho–para-Directing Activators: –CH3, –OH, –NH2, –OCH3
6.1K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
6.1K
01:25Radical Anti-Markovnikov Addition to Alkenes: Overview
3.4K
The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.
3.4K