一个欧 (III) 复合体作为一个高效的单片氧发光探头
Bo Song1, Guilan Wang, Mingqian Tan
1Department of Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.
Journal of the American Chemical Society
|October 13, 2006
概括
一种新型的欧 () 复合物作为单氧 (1O2) 的敏感探头,使其能够在生物系统中检测和成像. 这个探测器在与1O2反应时表现出增强的发光,促进了精确的细胞监测.
科学领域:
- 协调化学 协调化学
- 分析化学 分析化学
- 生物物理化学 生物物理化学
背景情况:
- 单点氧 ((1) O2) 是一种参与各种生物过程的活性氧物种.
- 开发用于 (1) O2检测的敏感和选择性探针对于理解其在生物系统中的作用至关重要.
- 现有的 (1) O2检测方法经常面临敏感性,选择性或在复杂的生物环境中适用的挑战.
研究的目的:
- 设计和合成一种新型的欧(III) 复合物,作为一种高度敏感和选择性的时间隔离的发光探针,用于单一氧气 ((1) O2).
- 用 (1) O2. 2 来描述新探测器的光物理性质和反应性.
- 为了证明探针在检测体外和活细胞中生成的 (1) O2 的适用性,使用时间隔离的发光成像.
主要方法:
- 一个新的欧 (III) 复合物的合成和表征: [4'-(10-甲基-9-甲基) -2,2':6',2"-特皮里丁-6,6"-二烯]二 (甲基) 四 (乙) -欧3+).
- 探测器的水溶性,稳定常数和pH范围的调查.
- 用 (1) O2 测量反应速率常数,以及在内氧化物形成时发光量子产量和寿命的变化.
- 在各种化学系统中检测1O2的演示,并随后在活的HeLa细胞中进行成像.
主要成果:
- 合成的欧 (III) 复合物具有很高的水溶性,很大的稳定常数 (~10^21) 和广泛的pH范围 (3-10).
- 探测器以高速率 (10^10 M(-1) s(-1) 特别与 (1) O2 反应,从而显著增加发光量子产率 (0.90%至13.8%) 和寿命 (0.80至1.29毫秒).
- 在MoO(4)(2-) /H(2) O2,TMPyP光敏化和HRP/IAA系统中成功检测了 (1) O2,并通过定时发光成像在活的HeLa细胞中对其进行成像.
结论:
- 新型欧洲 () 复合体是一种高效的时间隔离发光探针,用于单片氧 ((1) O2) ,具有出色的灵敏度和选择性.
- 探测器的有利性质和在细胞成像中的成功应用突显了其在生物研究和诊断方面的潜力.
- 时间调节的发光成像为监测活细胞中的O2生成提供了一种可靠的方法,克服背景光干扰.
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