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通过C ((sp²) -H氧化,用一种solvatochromic organoiridium ((III) 复杂基探头点燃高酸

Bhaskar Sen¹, Jogat Gogoi¹, Kripamoy Aguan²

¹Department of Chemistry, North Eastern Hill University, Shillong-793022, Meghalaya, India. snehadri@gmail.com.

|March 13, 2026

概括

研究人员开发了一种新的 (III) 复合物,用于高度选择性地检测活性氧物种低酸 (HOCl). 这个复合体使用独特的C-H化机制,使特定的传感和生物成像应用成为可能.

科学领域:

无机化学无机化学
化学传感器化学传感器
生物成像是一种生物成像.

背景情况:

活性氧物种 (ROS) 在生物过程中起着至关重要的作用.
低酸 (HOCl) 是一个关键的ROS,参与细胞信号和免疫反应.
对HOCl的选择性和敏感检测对于理解其生物功能至关重要.

研究的目的:

开发一种高度选择性的光探针,用于检测低酸 (HOCl).
为了研究基于C(sp2) -H基化的传感机制.
为了评估探头在细胞生物成像中的适用性.

主要方法:

一个solvatochromic环金属化Ir(III) 复合体 (Ir-1) 的合成和表征.
使用ESI-HRMS和1H NMR定位对其他反应性物种进行HOCl的选择性识别研究.
理论计算和电化学分析以阐明传感机制.
在HEK-293T细胞中的体外生物成像研究.

主要成果:

复合物Ir-1通过独特的Csp2-H基化机制对HOCl进行了选择性检测.
伊尔-1显示出明显的溶解色态行为,其发光因溶剂极性而从绿色转变为色红色.
传感机制涉及区域和立体选择性添加HOCl穿过三醇C=C键,然后进行C-H基化.
水氧化调节了Ir(III) 复合体的电子特性,导致发光色彩切换.
在HEK-293T细胞的细胞质和细胞核中,Ir-1成功染色了HOCl.

结论:

开发的Ir(III) 综合体为高度选择性的HOCl检测提供了一个新的平台.
独特的C-H化机制为反应性氧物种传感提供了一种新策略.
该探测器展示了在生物系统中实时监测HOCl的潜力.

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