具有可切换离子导电性的酸/诱导可逆异构的连续多孔芳香框架膜
Jian Song1, Hengtao Lei1, Lin Lin1
1Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University Changchun Jilin 130024 China tianyy100@nenu.edu.cn zhugs@nenu.edu.cn.
Chemical science
|March 17, 2025
概括
研究人员开发了用于酸可切换离子导体的新型多孔芳香框架 (PAF). 这些智能材料在响应pH值时表现出显著的导电性变化,从而在恶劣的化学环境中实现了新的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 纳米技术 纳米技术
背景情况:
- 响应刺激的离子导体对于清洁能源和智能设备等先进应用至关重要.
- 根据环境刺激,特别是pH值,开发具有可调节离子导电性的材料仍然是一个重大挑战.
- 现有的材料往往在结构稳定性,多孔性和酸切换所需的可逆反应方面扎.
研究的目的:
- 设计和合成能够在响应酸性和性条件下进行可逆结构变化的新型多孔芳香基架 (PAF).
- 研究这些PAF及其相应膜的离子导电特性.
- 为了证明在酸刺激的基础上实现显著,可切换的离子导电性的可行性.
主要方法:
- 利用多孔芳香框架 (PAF) 作为材料设计的平台.
- 将商用pH指标纳入PAF结构中.
- 制造了离子导电PAF粉末和连续膜.
- 在不同的pH值和湿度条件下,具有结构可逆性和离子导电性.
主要成果:
- 合成的PAF在响应酸性和性环境时表现出可逆的结构变化.
- 在特定条件下 (25°C,98%RH) 实现了大约4个数量级的显著离子导电开关 (10-7 S cm-1到10-3 S cm-1).
- 连续PAF膜在NaOH处理后显示出超高的离子导电性 (7.29 × 10-1 S cm-1) 并显示出良好的酸/可切换循环稳定性.
结论:
- 这项研究介绍了第一份关于能动响应酸化学刺激的离子导电性多孔框架和膜的报告.
- 开发的PAF为创建"智能"离子导体材料提供了一个有希望的新策略.
- 这些材料甚至在恶劣的化学环境中也显示出应用的潜力,推动了生物系统,清洁能源和智能设备等领域的发展.
相关概念视频
01:17Ion Exchange
518
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...
518
01:15Potentiometry: Membrane Electrodes
348
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
348
01:17Pore Transport and Ion-Pair Transport
322
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
322
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.6K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.6K
01:23Membrane Fluidity
150.5K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
150.5K
01:09Ion-Exchange Chromatography
291
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...
291