Water-Soluble 3-Hydroxyflavone Salts for Aqueous Sensing
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Solution Overview
Problem
Current 3-hydroxyflavone sensors lack specificity in detecting anions and cations, particularly in aqueous environments, and are not suitable for sensing DNA chains due to low water solubility and limited sensitivity to environmental changes.
Innovation Solution
Development of water-soluble 3-hydroxyflavone salts, such as N-(3-hydroxy-4'-flavonyl)-N,N,N-trimethylammonium sulphate, which exhibit enhanced fluorescence properties and ratiometric changes in response to anions, cations, and DNA structures, allowing for sensitive detection and differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional 3-hydroxyflavone sensors are used, then fluorescence sensing capability is provided, but water solubility is low and detection specificity is poor
Solution Approach 1:
The patent modifies the chemical structure of 3-hydroxyflavone by introducing a quaternary ammonium group at the C-3 position, changing the molecular parameters to improve water solubility while maintaining fluorescence properties. This structural parameter change enables the sensor to function effectively in aqueous environments for detecting anions, cations, and DNA chains
Solution Approach 2:
The invention creates a composite structure by combining the 3-hydroxyflavone core with a quaternary ammonium group and various substituent groups (R1-R6). This composite molecular structure integrates the fluorescent properties of 3-HF with the water-solubility characteristics of the ammonium salt, resolving the contradiction between sensing capability and solubility
2Illumination intensity
If conventional 3-hydroxyflavone sensors are used, then fluorescence emission is observed, but detection precision and sensitivity to environmental changes are limited
Solution Approach 1:
The patent introduces specific functional groups at defined positions (R1-R6 substituents) to create local variations in the molecular structure that enhance sensitivity to specific analytes. The quaternary ammonium group at C-3 provides localized positive charge density that specifically interacts with anions, while other substituents can be tailored for cation or DNA detection, improving measurement precision without compromising overall fluorescence emission
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 water-soluble 3-hydroxyflavone salts demonstrate efficient sensing capabilities for anions, cations, and DNA chains, providing clear emission bands and ratiometric quenching patterns, enabling effective identification and potential applications in bio-sensing and environmental monitoring.
Implementation Method 1
3-Hydroxyflavones (3-HF) are important fluorescent sensors due to their excited state intramolecular proton transfer (ESIPT) property originated from their normal (N*) and phototautomer forms (T*)
Implementation Method 2
This property provides 3-HF with well separated two emission bands on fluorescent spectroscopy, resulting from their excited normal and tautomeric forms, intensities of which are sensitive to their environment, including polarity and hydrogen bonding perturbations
Data Source
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AI summary
The present invention discloses the syntheses of new 3-hydroxyflavone salts with defined structures, which are suitable for sensor applications for sensing anions, cations, DNA chains and organic compounds soluble in highly polar solvent like water.