Bis-Iridium Complexes for Aqueous ECL Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electrochemiluminescence-based in vitro diagnostic assays lack sensitivity, and existing compounds for organic light-emitting devices are not effective in aqueous mediums, limiting their utility in biological sample detection.
Innovation Solution
Development of novel bis-iridium complexes for manufacturing electrochemiluminescent labels that can operate effectively in aqueous solutions, utilizing specific iridium-based chemiluminescent compounds with varied substituents and bridging groups to enhance sensitivity and light emission properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-soluble ruthenium complexes are used for ECL-based detection, then the assay can operate in aqueous medium, but the sensitivity is insufficient
Solution Approach 1:
The patent changes the metal center from ruthenium(II) to iridium(III), fundamentally altering the electrochemical and photophysical parameters of the complex. This parameter change enables both high sensitivity and efficient operation in aqueous medium, resolving the contradiction between detection sensitivity and aqueous compatibility
Solution Approach 2:
The patent employs composite structures where iridium(III) complexes are combined with organic ligands (such as phenylpyridine derivatives) to create hybrid materials that exhibit both water solubility and high electrochemiluminescence sensitivity. The composite nature allows optimization of both aqueous compatibility and detection performance
2Illumination intensity
If organic light emitting device compounds are used, then light emission can be achieved, but they are not effective in aqueous mediums required for biological sample detection
Solution Approach 1:
The patent modifies the chemical parameters by replacing organic light-emitting compounds with iridium(III) coordination complexes that possess inherent water solubility through their coordination sphere and counterions, while maintaining high light emission efficiency through the heavy atom effect and spin-orbit coupling enabled by the iridium center
Solution Approach 2:
The patent introduces hydrophilic groups (such as sulfonate, carboxylate, or hydroxyl groups) at specific positions on the organic ligands coordinated to iridium(III). This local modification of quality enables aqueous solubility without compromising the overall light-emitting capability of the complex
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bis-iridium complexes provide high sensitivity and efficient electrochemiluminescence in aqueous systems, overcoming the limitations of existing compounds and improving detection methods for biological samples.
Implementation Method 1
Electrogenerated chemiluminescence (also called electrochemiluminescence and abbreviated ECL) is the process whereby species generated at electrodes undergo high-energy electron-transfer reactions to form excited states that emit light
Implementation Method 2
species generated at electrodes undergo high-energy electron-transfer reactions to form excited states that emit light
Data Source
AI summary
The present invention relates to novel bis-iridium-based Ir(III) complexes, labels manufactured using these complexes and a method for producing such complexes.