实验和理论研究糖醇酸和水之间的结复合物
Justyna Krupa1, Iwona Kosendiak1, Maria Wierzejewska1
1Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383 Wrocław, Poland.
研究人员使用计算和实验方法研究了甘油酸 (GA) 和水复合体. 最稳定的GA水复合体,包括两个键和六个环,在固体中被确定.
科学领域:
- * 分子光谱学
- * * 量子化学 是一个量子化学.
- * 超分子化学
背景情况:
- * 甘油酸是一种简单的α-基酸,在化品和化学合成中具有应用.
- * 了解其与水的相互作用对于各种化学过程和生物系统至关重要.
- *以前的研究已经探索了甘油酸的特性,但其与水的复合物的详细结构调查是有限的.
研究的目的:
- *通过计算预测和实验识别糖醇酸和水之间形成的最稳定的1:1复合物.
- * 描述甘氨酸-水复合物的结构和结特征.
- * 在惰性矩阵环境中调查其他潜在的符合条件的存在.
主要方法:
- *使用MP2和B3LYPD3方法进行理论计算,以预测稳定的复杂结构.
- *实验矩阵隔离红外光谱在固体中检测和识别复合物.
- *对计算预测和实验光谱数据进行比较分析.
主要成果:
- *通过计算预测了五种潜在的1:1甘油酸-水 (GAH2O) 复合体.
- *最稳定的预测复合体,具有两个分子间OHO气键形成六个成员的环,在实验证实在固体中.
- * 这种主导结构涉及水作为质子捐赠者和接受者.
- * 暂时确定了另外两个结构,其中葡萄糖酸的酒精OH组作为质子捐赠体.
结论:
- *这项研究成功地确定了糖醇酸和水之间的最稳定的1:1复合物.
- *经过实验验证的结构显示,由双键稳定稳定的稳定的六个环.
- *这些发现提供了关于糖醇酸在水存在中的分子间相互作用和自我组装的宝贵见解.
更多相关视频
10:28Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
相关概念视频
Aldehydes and Ketones with Water: Hydrate Formation
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
Acid-Catalyzed Hydration of Alkenes
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
Acid Halides to Carboxylic Acids: Hydrolysis
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
Hydrolysis
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
