基于基[3.4-c]烯-4,6-的捐赠者-接受者-捐赠者类型AIE基因:合成,电聚化和电色染色
Zhe Xu1, Shouyi Ming2, Teng Zhang1
1Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China.
概括
基于[3.4-c]pyrrole-4,6-dione (TPD) 的新光反应单体表现出聚合诱导的排放和增强的电化学活性. 从这些单体中衍生的聚合物在近红外区域表现出稳定的电色特性.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 电化学 电化学 电化学
背景情况:
- 光电功能材料对于光电子设备至关重要.
- 基于提[3.4-c]罗-4,6- (TPD) 的材料具有独特的电子和光学性能.
研究的目的:
- 合成和描述包含TPD单元的新型光响应和电活性单体.
- 调查TPD单元对单体性质的影响,包括聚合诱导排放 (AIE) 和电化学行为.
- 探索这些单体的聚合和由此产生的聚合物的电色性能.
主要方法:
- 基于TPD的单体的合成和表征.
- 结晶学,光谱学和计算分析.
- 聚合物薄膜的电化学聚合和表征.
- 在近红外区域的电色性能评估.
主要成果:
- 合成的TPD单体具有平面几何形状,并表现出聚合诱导排放 (AIE).
- 引入TPD单元降低了能量水平并增加了电化学活性.
- 电化学聚合产生了具有可逆电化学活性的稳定聚合物.
- 聚合物薄膜在近红外线中表现出显著的电色特性,具有高光学对比率 (1000 nm 的 27.1%).
结论:
- 基于TPD的单体是先进的功能材料的有希望的构建模块.
- 开发的聚合物具有出色的电色性能,适合光电子应用.
- 这项研究有助于开发用于近红外电色器件的新材料.
相关概念视频
01:26Thermal 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
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[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
01:26Photochemical 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
01:29Diels–Alder Reaction: Characteristics of Dienes
4.1K
The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
4.1K
01:24Diels–Alder Reaction: Characteristics of Dienophiles
6.0K
In a Diels–Alder reaction, the diene is usually an electron-rich system and acts as a nucleophile, whereas the dienophile is electron-deficient and functions as an electrophile. Much like the diene, the nature of the dienophile significantly impacts the outcome of the reaction.
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends...
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends...
6.0K
01:17Thermal 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.
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