咖啡酸印记聚合物的制备和应用
Şeyda Karaman Ersoy1, Esma Tütem2, Kevser Sözgen Başkan2
1Division of Analytical Chemistry, Faculty of Pharmacy, Fenerbahçe University, İstanbul, Turkiye.
Turkish journal of chemistry
|January 4, 2024
概括
已开发出分子印记聚合物,用于提取咖啡酸 (CA) 和原酸 (CLA). 优化的聚合物表现出有效的识别和分离复杂样品的能力.
科学领域:
- 聚合物化学 聚合物化学
- 分析化学 分析化学
- 生物化学 生物化学
背景情况:
- 咖啡酸 (CA) 和原酸 (CLA) 是各种天然产品中发现的重要化合物.
- 高效的提取和净化方法对于它们在复杂矩阵中的分析至关重要.
- 分子印记为目标分析物提供了一种选择性识别方法.
研究的目的:
- 合成和表征分子印记聚合物 (MIPs) 用于选择性提取CA.
- 为了评估MIP的性能,同时提取CA和CLA.
- 优化分子印记固态相提取 (MISPE) 方法用于CA和CLA净化.
主要方法:
- 使用咖啡酸作为模板和各种单体 (4-乙烯酸,甲烯酸,烯胺,1-乙烯胺) 和交叉链接剂 (乙烯基甘二甲酸盐) 的MIPs的合成.
- 为控制实验准备非印制聚合物 (NIPs).
- 吸附研究 (动态和静态) 来评估聚合物结合特性.
- 使用高性能液态染色学 (HPLC) 分析优化MISPE协议 (加载,洗,化).
主要成果:
- 最佳的MIP配方被确定为咖啡酸的1:4:16摩尔比例:4-维尼尔皮里丁:乙烯基醇二甲基烯酸盐.
- 与NIP相比,MIP显示了CA的选择性吸附特性.
- 优化的MISPE方法成功地从复杂样本中分离和净化CA和CLA,并通过HPLC进行验证.
结论:
- 分子印记聚合物为提取和净化咖啡酸和酸提供了高度选择性和高效的工具.
- 开发的MISPE方法是一种强大的技术,用于在复杂的自然产品矩阵中分析这些化合物.
- 这项研究突出了分析化学中量身定制的MIP的潜力,以针对性地分离分析物.
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相关概念视频
01:31Preparation of Carboxylic Acids: Overview
There are various methods for the preparation of carboxylic acids. For example, oxidation of primary alcohols or aldehydes using strong oxidizing agents results in a carboxylic acid. Aldehydes can also be oxidized in the presence of mild oxidizing agents.
01:20Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview
The Fischer esterification reaction was developed by the German chemist Emil Fischer in 1895. It is a condensation reaction between carboxylic acids and alcohols in an acidic medium to give esters and water.
01:15Carboxylic Acid Derivatives: Overview
Carboxylic acid derivatives are formed by replacing the hydroxyl group of carboxylic acids with a different functional group. The most common carboxylic acid derivatives are:
01:07Preparation of Acid Anhydrides
One of the methods for preparing symmetrical or unsymmetrical acid anhydrides involves the treatment of acid chlorides with the sodium salt of carboxylic acids. The reaction proceeds via a nucleophilic acyl substitution.
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
01:18Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives
Aldehydes are more reactive than carboxylic acids and hence, can get over-reduced to alcohol in the presence of strong reducing agents. Therefore, carboxylic acids are inefficient in preparing aldehydes using LAH.
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of acid...
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of acid...
01:13Preparation of Carboxylic Acids: Carboxylation of Grignard Reagents
Carboxylic acids can be prepared by the carboxylation of Grignard reagents (RMgX). This method is convenient for converting alkyl (primary, secondary or tertiary), vinyl, benzyl, and aryl halides to carboxylic acids with one additional carbon than the starting RMgX.