Heterocyclic Fluorescent Dyes via DPP Derivatives
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Solution Overview
Problem
There is a need for stable water-insoluble organic pigments with improved fluorescence properties in the visible range, particularly for applications in the dyeing industry and modern biomedical techniques such as optical imaging, where compounds with high fluorescence quantum yield are required.
Innovation Solution
Development of novel heterocyclic compounds of specific structure, derived from diketopyrrolopyrrole (DPP) derivatives through a three-step synthesis, exhibiting strong absorption in the 520-620 nm range and fluorescence in the 570-630 nm range with high quantum yields, which are poorly soluble in water and organic solvents, making them suitable as pigments and functional dyes for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compounds with high fluorescence quantum yield are developed for biomedical applications, then fluorescence performance is improved, but solubility in water and organic solvents increases which reduces pigment stability
Solution Approach 1:
The patent applies local quality by introducing specific heteroaromatic substituents (furan, thiophene, selenophene rings) at particular positions on the DPP core structure. These localized structural modifications create regions with different solubility characteristics while preserving the central fluorescent core's high quantum yield, thus resolving the contradiction between fluorescence performance and solubility stability.
Solution Approach 2:
The patent creates composite molecular structures by combining the diketopyrrolopyrrole core with multiple types of heteroaromatic systems (furan, thiophene, selenophene) and various substituent groups. This composite approach allows optimization of both fluorescence properties and solubility characteristics through the synergistic combination of different molecular components with complementary properties.
2Stability of the object's composition
If compounds are made water-insoluble for pigment applications, then pigment stability is improved, but fluorescence properties in the visible range may be compromised
Solution Approach 1:
The patent applies parameter changes by systematically varying the heteroatom type (O, S, Se) in the aromatic rings and modifying substituent patterns to tune both the solubility parameters and optical properties. This allows achieving water-insolubility for pigment stability while simultaneously optimizing fluorescence quantum yield and absorption characteristics in the visible range.
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 compounds display unique optical and photophysical properties, including strong absorption and fluorescence, making them excellent candidates for fluorescence imaging, cation detection, and coloring in paints, while their poor solubility enhances their application as pigments, reducing the amount needed for effective use.
Implementation Method 1
strong absorption in the 520-620 nm range
Implementation Method 2
fluorescence in the 570-630 nm range with high quantum yields
Data Source
AI summary
The invention relates to novel compounds of formula (III) that can be used as heterocyclic dyes of unique structure and properties. These dyes can be obtained in a three-step synthesis from simple substrates.