Self-enhanced electrogenerated chemiluminescence of ruthenium(II) complexes conjugated with Schiff bases
作者： Panpan Li , Zhaoyu Jin , Meilian Zhao , Yanxue Xu , Yong Guo
DOI: 10.1039/C4DT03310H
关键词:
摘要: In this work, we obtain two ruthenium(II) complexes with Schiff base cavities that exhibit significantly enhanced electrochemiluminescence (ECL) intensity and quantum efficiency due to Ru(bpy)32+ in aqueous solution, without the addition of tri-n-propylamine (TPrA). The great increase ECL is confirmed be electrochemical oxidation phenolic hydroxyl groups resonant structure imino radicals. Thus, electrons are transferred intramolecularly Ru(III) center, leading efficient generation excited state Ru(II)*. Subsequently, find Co2+ bonding salen cavity can selectively quickly quench signal. Furthermore, study mechanism process by which hinders blocks electron transfer from radicals Ru center. a highly sensitive selective probe for recognition was developed stable response over concentration range 0.9 μM 6.3 detection limit as low 21 nM.
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