铱
适体
检出限
纳米颗粒
配体(生物化学)
化学
纳米材料
组合化学
水溶液
材料科学
线性范围
模板
纳米技术
色谱法
物理化学
有机化学
生物化学
遗传学
受体
生物
催化作用
作者
Ziwang Mao,Yibo Zhao,Jianhua Dong,Liangzhi Li,Yuyang Zhou
标识
DOI:10.1016/j.snb.2023.134480
摘要
To explore novel and efficient ECL luminophores, a series of cationic iridium(III) complexes with 4,7-diphenyl-1,10-phenanthroline as the ancillary ligand and various main ligands were investigated in this work. The comprehensive studies demonstrate complex 1, with 2-phenylbenzothiazole (bt) as main ligand, exhibited superior ECL properties in aqueous buffer compared to other complexes. Importantly, the structurally optimized complex 1 was successfully further encapsulated into silica nanoparticles to prepare electrochemiluminescent iridium(III)-doped silica nanoparticles (Ir@SiO2 NPs). These Ir@SiO2 NPs were then utilized to construct a sensitive and specific ECL aptamer sensor for detecting acetamiprid residues in tea. Notably, our developed sensor demonstrated wide linear ranges from 10 pM to 10 μM and low limit of detection of 1.3 pM. These experimental results presented in this work undoubtedly demonstrate iridium(III)-doped silica nanoparticles as a new and efficient type of ECL nano-emitter have great potentials in ECL-related analytical applications in the future.
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