无孔基酸的可控制的结构转化 基基[60]通过吸收/释放形式来烯
Estefanía Fernández-Bartolomé1,2, José Santos2, Eider Rodriguez-Sánchez2
1IMDEA, Nanociencia C/Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain.
Chemistry (Weinheim an der Bergstrasse, Germany)
|October 17, 2023
概括
研究人员使用hexakis[60]fullerene开发了一个新的有机框架. 这种动态的晶体结构通过内部重组选择性地吸附并释放,从而提供了对主体-客体材料设计的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 具有选择性宿主-客的能力的动态结构对于分子识别至关重要.
- 开发具有先进功能的新型有机材料是一个活跃的研究领域.
- 软相互作用在促进动态晶体结构方面发挥着关键作用.
研究的目的:
- 设计和描述一个新的纯有机动态框架.
- 研究小挥发性分子的选择性吸附和释放.
- 为吸附应用提供有机分子晶体设计原理的见解.
主要方法:
- 一个基于hexakis[60]fullerene的新型有机框架的合成.
- 结晶结构及其动态性质的表征.
- 研究与甲基分子的宿主-客人相互作用.
主要成果:
- 成功合成了一种新的纯有机动态框架.
- 该框架显示了的选择性吸收和释放.
- 内部结构重组促进了宿主-客人的过程.
- 弱范德瓦尔斯相互作用稳定了晶体结构.
结论:
- 开发的hexakis[60]基于富勒烯的框架代表了用于选择性分子吸附的新材料.
- 这项研究表明有机分子晶体在宿主-客户应用中的潜力.
- 这项研究有助于理解动态框架及其用于选择性客人绑定的结构重组.
相关概念视频
Multiple Halogenation of Methyl Ketones: Haloform Reaction
2.0K
A method involving the transformation of methyl ketones to carboxylic acids using excess base and halogen is called the haloform reaction. It begins with the deprotonation of α hydrogen to form an enolate ion which reacts with the electrophilic halogen to give an α-halo ketone. The step continues until all the α protons are substituted to form a trihalomethyl ketone. The resulting molecule is unstable, and in the presence of a hydroxide base, it readily undergoes nucleophilic...
2.0K
Chair Conformation of Cyclohexane
14.7K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
14.7K
Halogenation of Alkenes
15.7K
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.
15.7K
Formation of Halohydrin from Alkenes
13.0K
An alkene, such as propene, reacts with bromine in the presence of water to yield a halohydrin. Halohydrins contain a halogen and a hydroxyl group attached to adjacent carbons. When the halogen is bromine, it is called a bromohydrin, while a chlorohydrin has chlorine as the halogen.
13.0K
Conformations of Cyclohexane
12.6K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
12.6K
Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K


