李芹, 李婷, 贺莹, 陈时洪. Detection of Glucose Using an Electrochemiluminescence Biosensor Based on Ru(bpy)2+3-Triethylamine System[J]. 2020, 39(3): 330-336.DOI: doi:10.3969/j.issn.1004-4957.2020.03.006.
Ru(bpy)2+3 has an excellent electrochemiluminescence(ECL) properties.However
the good solubility makes it meet a huge problem with the immobilization.In this experiment
an ECL biosensor for detection of glucose was fabricated by modifying Pt NPs-Ru complexes composed of Pt nanoparticles and Ru(bpy)2+3 onto the electrode surface for immobilization of glucose oxidase(GOx).In fact
the ECL signal of Ru(bpy)2+3-triethylamine system could be efficiently quenched by H2O2.With increase of glucose concentration
amount of H2O2 generated in situ by glucose under the catalysis of GOx increased
and the ECL signal gradually decreased
thus achieving the detection of glucose.A good linear relationship between ECL intensity and the logarithm of glucose concentration in the range of 1.0×10-8-5.0×10-5 mol/L was obtained
with a detection limit of 5.2×10-9 mol/L.The biosensor showed good stability and high selectivity.The Pt NPs-Ru complexes provide a good platform for construction of ECL sensor and a new method for detection of glucose.