紫外线光驱动的氧化从多孔异环聚合物释放
Sharon T Gregg1, René-Ponce Nze1, Qingchun Yuan2
1School of Chemistry and Chemical Engineering, Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
Macromolecular rapid communications
|June 27, 2024
概括
研究人员开发了新型多孔聚合物,能够根据需求储存和释放氧化 (NO). 紫外线光触发了这些富含的材料中受控的NO释放,显示了光疗应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物医学工程 生物医学工程
背景情况:
- 氧化 (NO) 是具有治疗潜力的关键信号分子.
- 开发高效的NO输送系统仍然是生物医学应用的挑战.
- 多孔材料在药物/分子储存和受控释放方面具有优势.
研究的目的:
- 为了合成具有异环原子核的新型多孔聚合物.
- 功能化这些聚合物用于储存和光触发的氧化 (NO) 的释放.
- 研究这些NO释放聚合物在光疗中的潜力.
主要方法:
- 通过凝结enamininitrile和tereftalaldehyde合成多孔聚合物.
- 氧化 (NO) 通过与酸性酸盐的化加载,诱导光响应性.
- 在PBS溶液中照射紫外线 (365nm) 辐射以触发NO释放.
- 在受控实验条件下的NO释放率的量化.
主要成果:
- 成功合成了具有异环结构的多孔聚合物.
- 在聚合物矩阵内实现生物活性氧化 (NO) 的有效储存.
- 经过UV光控制的NO释放 (在60分钟内约10.0-50.0μmolg-1).
- 建立了聚合物特性 (组成,多孔性) 和NO储存/释放特征之间的相关性.
结论:
- 丰富的多孔聚合物可以有效地储存和释放氧化 (NO).
- 紫外线光可以精确控制NO释放动力学.
- 这些光敏无释放聚合物有望融入光疗策略.
- 开发的材料为先进的NO输送系统提供了一个平台.
相关概念视频
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
3.8K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
3.8K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.3K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.3K
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.2K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.2K


