在水溶液中具有可逆光感应导电调节的离子液体
Yige Zhang1, Xiaowen Xie1, Jianliang Liu1
1Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China.
Scientific reports
|August 23, 2023
概括
合成了具有阿扎本齐米达的光响应性离子液体. 它们的导电性在紫外线下可逆地增加,在可见光下下降,显示出智能设备的潜力.
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
- 摄影化学的使用.
背景情况:
- 响应刺激的离子液体正在获得各种应用的关注.
- 含有阿佐的化合物表现出对光反应的行为.
研究的目的:
- 设计和合成新型阿佐胺醇离子液体.
- 为了研究它们的可逆光导电调节.
- 探索化学结构对光反应的影响.
主要方法:
- 合成了三种亚博胺醇离子液体.
- 在水溶液中的紫外线/可见光辐射下测量电导率变化.
- 结构与财产关系的分析.
主要成果:
- 合成的离子液体在光照射后显示可逆导电性变化.
- 紫外线照射显著增加导电率 (长链的导电率高达75.5%).
- 可见光辐射使导电恢复到最初的状态.
结论:
- 可逆导电性调节归因于光诱导的亚博烯异构和随后的离子液聚合变化.
- 这项研究为光响应性离子液体提供了一个分子设计策略.
- 潜在的应用包括光导开关和微光控制装置.
相关概念视频
Electrolyte and Nonelectrolyte Solutions
63.3K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
63.3K
Ion Exchange
621
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
621
Photochemical Electrocyclic Reactions: Stereochemistry
1.9K
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
1.9K
Ion-Exchange Chromatography
578
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
578
Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
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.
2.4K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K


