优化的协议,用于确定单个氧气量子收益率的水溶性酸,使用伊米达和4-酸-N,N-二甲氨陷
A V Berezhnaya1, D A Gvozdev2, D A Bunin3
1Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, Moscow, 119991, Russia. berezhnayaav@my.msu.ru.
概括
使用伊米达 (ImH) 和RNO陷的优化单点氧 (1O2) 测量协议对于精确评估水溶性酸 (Pcs) 的光动力学活性至关重要. 这项研究建立了最佳条件,以最大限度地减少干扰,并确保可靠的量化.
科学领域:
- 光化学和光物理学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 精确测量单点氧 (1O2) 量子产量对于评估光敏剂,如氨酸 (Pcs) 的光动力学活性至关重要.
- 现有的化学陷,如意达 (ImH) 和4-酸-N,N-二甲基氨 (RNO) 系统,可能会受到与Pcs的相互作用的影响,可能会损害测量准确性.
- 了解和减轻这些相互作用对于可靠的1O2量化至关重要.
研究的目的:
- 开发和优化一个用于测量单点氧 (1O2) 量子产量的协议,使用ImH-RNO化学陷测量水溶性酸 (Pcs).
- 系统地研究ImH度,pH和离子强度对ImH和Pcs之间的相互作用的影响.
- 建立最佳条件,最大限度地减少光谱变化,并确保准确的1O2产量确定.
主要方法:
- 在不同的ImH度,pH水平和离子强度下,系统地研究ImH-Pc相互作用.
- 在不同溶液条件下对酸 (Pcs) 的光谱和光物理表征.
- 使用优化的ImH-RNO系统和酸盐缓冲盐水 (PBS) 中的参考陷 (TMAPA) 进行单点氧 (1O2) 量子产量的比较测量.
主要成果:
- 使用ImH-RNO系统测量1O2的最佳条件被确定为0.5mM的ImH度在具有离子强度>100mM的中性pH缓冲器中.
- 这些条件有效地将Pcs中的ImH诱导的光谱变化最小化,确保可靠的1O2量化.
- 对比测量验证了优化的协议,显示了与参考炭烯陷 (TMAPA) 一致的结果.
结论:
- 使用ImH-RNO系统的优化协议提供了一种可靠的方法,用于量化水溶性酸 (Pcs) 中的单点氧 (1O2) 量子产量.
- 建立的最佳条件减轻了来自ImH-Pc相互作用的干扰,提高了测量精度.
- 这一经验证的协议有助于对各种PC的光动力学活性进行评估.
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