新兴的固态循环添加化学用于分子太阳能热能储能
Cijil Raju1, Han P Q Nguyen1, Grace G D Han1
1Department of Chemistry, Brandeis University 415 South Street Waltham MA 02453 USA gracehan@brandeis.edu.
Chemical science
|October 14, 2024
概括
固态分子系统使用可逆光环添加物储存太阳能. 这些设计提供高能量储存密度,为先进的太阳能热电池铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 分子太阳能热能储存利用可逆光化学反应.
- 固态系统比传统的基于液体的存储提供了优势.
- 开发高效的固态分子设计对于实际应用至关重要.
研究的目的:
- 为了说明最近发现的固态分子太阳能热能存储设计.
- 为了比较各种分子设计的能量储存密度.
- 概述了用于固态反应的工程晶体包装结构的策略.
主要方法:
- 分子设计的审查和插图,包括基,胺基和基.
- 对可逆 [2+2] 和 [4+4] 光环添加反应的分析.
- 储能密度的比较 (6146 kJ mol-1 或高达 318 J g-1).
主要成果:
- 确定了能够进行可逆光环添加的分子支架,用于储能.
- 在不同的分子设计中量化能量储存密度.
- 证明了晶体包装对于促进固态反应的重要性.
结论:
- 有前途的分子支架显示出有效固态太阳能储存的潜力.
- 工程晶体包装是成功固态光化学反应的关键.
- 这些发现指导了用于固态太阳能热电池的新分子系统的开发.
更多相关视频
相关概念视频
Cycloaddition Reactions: MO Requirements for Thermal Activation
3.5K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.5K
Cycloaddition Reactions: Overview
2.5K
Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
2.5K
Cycloaddition Reactions: MO Requirements for Photochemical Activation
2.0K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.0K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K


