Sulfonated 7-Aminocoumarin Dyes for Broad pH Fluorescence
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Solution Overview
Problem
Current fluorescent dyes, such as Alexa Fluor 350, have limitations in pH range and stability, necessitating the development of dyes with enhanced fluorescence and photostability for bioanalytical and diagnostic applications across a broader pH range.
Innovation Solution
Development of sulfonated derivatives of 7-aminocoumarin with fused rings, specifically compounds like V07-09144 and V07-09111, which offer high fluorescence quantum yield and photostability, suitable for bioanalysis and immunofluorescent applications, with improved solubility and binding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Alexa Fluor 350 dye is used, then fluorescence intensity is achieved, but photostability and pH range are limited
Solution Approach 1:
The patent modifies the chemical structure of the dye by changing parameters such as introducing sulfonate groups (SO3H) and adjusting the coumarin derivative components, which changes the photostability and pH range parameters to achieve both high photostability and broad pH applicability
Solution Approach 2:
The invention creates a composite dye structure combining coumarin derivatives with sulfonate groups and other functional moieties (such as carboxylic acid groups, hydroxyl groups) to achieve synergistic effects that provide both high photostability and extended pH range
2Measurement precision
If conventional dyes are used, then fluorescence is achieved, but sensitivity and selectivity are insufficient
Solution Approach 1:
The patent optimizes the dye structure by adjusting parameters such as the coupling agents, linkers, and functional groups to enhance fluorescence quantum yield and photostability, thereby improving both sensitivity and measurement reliability
3Ease of manufacture
If dye structure is simplified, then manufacturing is easier, but fluorescence performance deteriorates
Solution Approach 1:
The patent divides the dye synthesis into modular segments using standardized coupling agents and building blocks (such as NHS esters, maleimides, pyridyldithio propionamides) that can be independently optimized, allowing for easier manufacturing while maintaining high fluorescence performance
Solution Approach 2:
The invention optimizes synthesis parameters such as reaction conditions, reagent ratios, and purification methods to achieve high fluorescence quantum yield while maintaining practical manufacturability
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
These compounds demonstrate superior fluorescence intensity and photostability, enabling enhanced sensitivity and selectivity in bioanalytical processes, including tissue detection and plate-based assays, across a broader pH range compared to existing dyes.
Implementation Method 1
These dyes are comparable to Alexa Fluor 350 dyes, having high fluorescence quantum yield and, for histological applications, high photostability
Implementation Method 2
FIG. 1 shows absorbance specta of 7-amino-4-methyl-3-coumarinylacetic acid (AMCA), V07-09111 '8-isomer', V07-09144 '6-isomer' and Alexa Fluor 350-NHS ester
Data Source
AI summary
Compounds used as dyes comparable to Alexa Fluor 350 dyes. The inventive compounds have high fluorescence quantum yield and high photostability. The dyes facilitate analysis of biological structures with enhanced sensitivity and selectivity.