Electrogenerated Chemiluminescence Sensor Based on a Self‐Assembled Monolayer of Ruthenium(II)‐bis(2,2′‐bipyridyl)(aminopropyl imidazole) on Gold Deposited Screen Printed Electrode

Abstract

A new electrogenerated chemiluminescence (ECL) sensor based on a self-assembled monolayer (SAM) of Ru(II)-bis(2,2'-bipyridyl)(aminopropyl imidazole) on a gold-deposited screen printed electrode (SPE) has been developed. Since the ECL emission of the Ru(II)-bis(2,2'-bipyridyl)(aminopropyl imidazole) complex can be easily obtained at an applied potential of less than + 0.8 V, the possibility of the oxidation of the Ru-complex SAM formed on gold-deposited SPE electrode surface was greatly diminished and thus the stability of the resulting Ru-complex SAM-based ECL sensor was enormously enhanced compared to the previously reported Ru(bpy) 3 2 + -derivative monolayer-based ECL sensors with applied potentials of more than + 1.0 V. In the present study, the gold deposited SPE with carbon nanotube paste was used in order to increase the amount of Ru-complex immobilized on the electrode surface through a large surface area of deposited gold nanoparticles causing good charge transport and thus leading to the increased sensitivity of the ECL sensor. The ECL characteristics obtained with the present Ru-complex SAM-based ECL sensor are compared with those obtained with other Ru(bpy) 3 2 + -SAM-based ECL sensors.

Bipyridyl Ruthenium-Decorated Ni-MOFs on Carbon Nanotubes for Electrocatalytic Oxidation and Sensing of Glucose

“…Many reports have focused on the immobilization of RuBpy, including the Langmuir-Blodgett technological approach [28][29][30], the self-assembly technique [31,32] and the sol-gel method [33][34][35][36]. The immobilization materials for RuBpy have also been applied to sensing, such as cation-exchange polymers [37][38][39], SiO 2 nanoparticles [40][41][42][43], carbon nanotubes [44,45], metal nanoparticles [46] and MOF materials [47]. Among these materials, multi-walled carbon nanotubes (MWCNTs) have excellent electrical conductivity (1.85 × 10 3 S cm −1 ) as a carrier material [48].…”

Adsorption of 2-Mercapto-1-methylimidazole on the (√3 × 22) Reconstructed and (1 × 1) Phases of an Ordered Au(111) Electrode under Potential Control

“…The organosulfur compounds bearing an imidazole (Im) functional group have been used as the linker for a variety of chemical species, − which facilitates electrocatalysis toward CO 2 reduction, − bioactivity, , corrosion prevention, − and sensor and molecular electronics development. ,− It is shown that the Im group entrapped at an Au electrode in an ionic liquid enables electrocatalytic conversion of CO 2 to CH 3 OH and HCOOH. This is achieved by shuffling a proton from a source to CO 2 via the Im group.…”

A solid-state electrochemiluminescence composite modified electrode based on Ru(bpy)32+/PAHNSA: Characterization and pharmaceutical applications

“…These methods can be classified into general approaches including electrostatic adsorption by cationic exchange polymer such as Nafion [6,7], self-assembled monolayer (SAM) [8,9], doping into nanomaterials [10,11], sol-gel [12] and composite films [13,14]. A direct deposition of the luminescent molecule on the carbon electrodes were also adapted [15,16] which believed to enhance the rate of electron transfer kinetics and avoid problems related to the lack of permeability, conductivity, and uniformity of the host membrane.…”