1-Amino-Phenazine Mediators for Electrochemical Detection
Solution Overview
Problem
Phenazine derivatives used in electrochemical detection of analytes have low solubility and are prone to reduction by reducing agents like ascorbate, leading to systemic errors in blood glucose determination.
Innovation Solution
A chemical compound or salt/solvate with a 1-amino-phenazine derivative structure, incorporating bulky and hydrophilic side chains to enhance solubility and resistance to reduction, used in a chemistry matrix with an oxidoreductase and redox cofactor for accurate analyte detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phenazine derivatives are used as redox mediators in electrochemical detection, then the detection capability is improved, but the solubility deteriorates and precipitates form on electrodes
Solution Approach 1:
The patent introduces hydrophilic groups (such as carboxyl, hydroxyl, or amino groups) at specific positions on the phenazine derivative molecules to enhance solubility in aqueous environments, while maintaining the core phenazine structure for redox mediation functionality. This local modification of molecular properties resolves the contradiction between detection capability and solubility.
Solution Approach 2:
The patent combines phenazine derivatives with hydrophilic moieties to create composite molecular structures that exhibit both the electrochemical activity of phenazines and the solubility characteristics of hydrophilic groups. These composite structures prevent precipitation on electrodes while retaining detection functionality.
2Measurement precision
If phenazine derivatives are used as redox mediators, then the detection response is enhanced, but the reliability deteriorates due to reduction by reducing agents like ascorbate
Solution Approach 1:
The patent modifies the redox potential of phenazine derivatives by introducing electron-withdrawing or electron-donating groups, thereby adjusting the electrochemical parameters to achieve a redox potential that is less susceptible to reduction by ascorbate and other reducing agents present in biological samples, while maintaining adequate detection response.
Solution Approach 2:
The patent designs phenazine derivatives with structural features that prevent irreversible reduction by common interfering substances, effectively creating mediators that can undergo multiple reversible redox cycles without degradation, thereby improving reliability in the presence of reducing agents.
3Power
If standard phenazine derivatives are used, then the redox mediation function is achieved, but the shelf life deteriorates due to precipitation and degradation
Solution Approach 1:
The patent introduces hydrophilic groups at specific positions on the phenazine derivative molecules to enhance solubility in aqueous environments, while maintaining the core phenazine structure for redox mediation functionality. This local modification of molecular properties resolves the contradiction between detection capability and solubility.
Solution Approach 2:
The patent incorporates stabilizing groups and protective structural features into the phenazine derivative molecules in advance, preventing precipitation and degradation before they can occur during storage or use, thereby extending shelf life while maintaining redox mediation function.
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 compound maintains stability and solubility, reducing interference from reducing agents, allowing for precise analyte detection and extended shelf life in diagnostic tests.
Implementation Method 1
phenazine derivatives have been proposed and evaluated as redox mediators in enzyme assays
Implementation Method 2
incorporating bulky and hydrophilic side chains to enhance solubility
Implementation Method 3
a chemistry matrix with an oxidoreductase and redox cofactor for accurate analyte detection
Data Source
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AI summary
The present invention relates to a chemical compound or a salt or solvate thereof being an 1-amino-phenazine derivative and to uses thereof. The present invention further relates to a chemistry matrix and to a test element comprising the aforesaid chemical compound. Moreover, the present invention relates to a method for determining the amount of an analyte in a sample, comprising contacting said sample with a chemistry matrix according to the present invention, estimating the amount of electrons liberated or consumed by the chemistry matrix in the presence of said liquid sample, and thereby determining the amount of an analyte in a liquid sample.