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Updated: May 28, 2026
A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
Published on: March 9, 2017
Cathodic aggregation-induced electrochemiluminescence sensor based on trinuclear iridium complexes for sensing Cu2+
Shili Hou1, Wei Li2, Jiali Li2
1College of Chemical and Textile Engineering, Xinjiang College of Science and Technology, Korla, 841000, PR China; Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541006, PR China.
Background:
Aggregation-induced emission (AIE) metal complexes overcome the limitation of aggregation-caused quenching (ACQ) of materials and become a class of promising electrochemiluminescence (ECL) emitters in the field of sensing. However, the cathodic AIECL of metal complexes has also attracted the attention of researchers. (42) RESULTS: Herein, novel cathodic AIECL emitters based on the trinuclear Ir(III) and Ru(II) complexes are synthesized from the metal sources of Ir3+ and Ru3+, and ligands of tri-terpyridine and terpyridine frameworks, respectively. Excitingly, the Ir(III) complex exhibits excellent ECL performance in the presence of K2S2O8 as co-reactants at potential ranges of -1.1 - 0 V. Further, the fabricated Ir(III) complex ECL sensors are applied for detecting Cu2+ with high sensitivity and selectivity. The ECL intensity of the fabricated sensor has a linear relationship with the logarithm of Cu2+ concentration, ranging from 5 × 10-10 mol L-1 to 1 × 10-3 mol L-1. The detection limit reaches 1.69 × 10-12 mol L-1 (109) SIGNIFICANCE: In addition, the fabricated sensor is used to determine Cu2+ in real samples with superior recoveries. This study will provide the strategy for designing cathodic AIECL emitters and sensing platforms for trace-detecting Cu2+. (33).
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