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Precision-Engineered Co-N <sub> 4− <i>x</i> </sub> -C <i> <sub>x</sub> </i> Single Atoms Enhance Potential-Resolved Ru(bpy) <sub>3</sub> <sup>2+</sup> Electrochemiluminescence via Reactive Oxygen Species

Ziqi KangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaShu ZhuBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaShijun WangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaZhizhi XiangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaZixin DengBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaXuehao TongBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaZixu WangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaYanghan SunBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaXiancheng LiuJinFeng LaboratoryGuangchao ZangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, ChinaGuangchao ZangBioelectronics and Biosensors Center, School of Medicine, Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, ChinaGuixue WangJinFeng LaboratoryYu‐Chan ZhangBiomedical Innovation and Entrepreneurship Practice Base, Lab Teaching &amp; Management Center, Chongqing Medical University, Chongqing 400016, China
2025en
ABI

Annotatsiya

Electrochemiluminescence (ECL) immunoassays based on tris(bipyridine)ruthenium [Ru(bpy) 3 2+ ] is the luminophore representing the most advanced and widely adopted approach in the field of in vitro diagnostics (IVD). However, the scarcity of potential-resolved ECL promoters for Ru(bpy) 3 2+ markedly limits its application in clinical diagnostics. Here, we report the first application of cobalt single-atom catalysts (SACs) designed via density functional theory (DFT) calculations to boost the multi-signal ECL of Ru(bpy) 3 2+ . Mechanism investigations unveil that “ROS accumulation” induced by CoC 4 and “ROS surge” driven by CoN 4 are the key factors governing the cathodic and anodic ECL. As a proof of concept, a sandwich ratiometric immunosensor was developed to detect tumor marker CEA and demonstrated excellent clinical feasibility. This work provides insights into the development of tailored ECL promoters by introducing DFT prediction and elucidating the relationships between ORR/HPRR/OER processes and Ru(bpy) 3 2+ ECL behavior, paving the way for designing precise immunoassays and advancing IVD techniques.

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DOI
10.34133/research.0842

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