Anthraquinone Quenching Dye for Broad Absorption and Aqueous Stability
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Solution Overview
Problem
Current quenching dyes used in biological imaging lack broad absorption spectra and stability in aqueous conditions, limiting their effectiveness in labeling and imaging biomolecules across visible and near-infrared wavelengths.
Innovation Solution
Development of an anthraquinone compound with a broad absorption spectrum in the visible and near-infrared regions, combined with high stability and superior solubility in aqueous conditions, allowing for effective labeling and imaging of biomolecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional quenching dyes (e.g., BHQ-1, BHQ-2, BHQ-3) are used, then fluorescence quenching effect is achieved, but absorption spectrum is limited and does not cover entire visible and near-infrared regions
Solution Approach 1:
The patent modifies the molecular structure of anthraquinone dyes by introducing specific substituents at defined positions (R1-R6) to shift and expand the absorption spectrum. By changing chemical parameters (substituent types, positions, and configurations), the dye achieves broad absorption across visible and near-infrared regions while maintaining strong quenching capability.
Solution Approach 2:
The patent creates composite dye molecules by combining anthraquinone chromophore with various functional groups and substituents (e.g., carboxyl, hydroxyl, amino, alkyl groups). This composite structure integrates the strong absorption properties of anthraquinone with the quenching capability, achieving both broad spectrum coverage and effective fluorescence quenching.
2Ease of operation
If functional groups are introduced into dyes for biomolecule binding, then labeling capability is improved, but reaction and storage stability deteriorates in aqueous conditions
Solution Approach 1:
The patent introduces functional groups at specific local positions (R1-R6) on the anthraquinone molecule based on their chemical properties and reactivity. By strategically placing groups such as carboxyl at certain positions and alkyl groups at others, the dye achieves selective binding to biomolecules while maintaining overall structural stability in aqueous environments.
Solution Approach 2:
The patent employs stable anthraquinone core structure that maintains its optical properties and chemical integrity over time. The functional groups are designed to be either permanently bound or temporarily reactive, with the core structure providing long-term stability similar to disposable components that maintain performance throughout their service life.
3Illumination intensity
If dyes are used to cover maximum absorption wavelength or entire fluorescence spectrum, then quenching effectiveness is improved, but solubility in aqueous conditions deteriorates
Solution Approach 1:
The patent introduces hydrophilic functional groups (carboxyl, hydroxyl, amino groups) as intermediaries between the hydrophobic anthraquinone core and the aqueous environment. These intermediary groups form hydrogen bonds and ionic interactions with water molecules, enabling the otherwise hydrophobic dye to dissolve in aqueous solutions while maintaining its broad absorption spectrum.
Solution Approach 2:
The patent modifies the physical-chemical parameters of the dye molecule by introducing polar functional groups that change the overall solubility characteristics. By adjusting the type, number, and position of hydrophilic groups, the dye achieves optimal balance between maintaining broad absorption coverage and achieving sufficient aqueous solubility for biological applications.
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 anthraquinone compound effectively covers the fluorescence wavelength ranges of commercially available dyes, maintaining optical properties and stability, enabling precise biomolecule labeling and imaging.
Implementation Method 1
a quenching dye which exhibits strong absorption intensity in the visible and near-infrared wavelength regions
Implementation Method 2
the quenching occurs via such mechanisms as fluorescence resonance energy transfer (FRET), photo-induced electron transfer and dye aggregation such as H-dimerization
Data Source
AI summary
The present disclosure provides a quenching dye with an anthraquinone structure, which has a broad and high absorption spectrum in the visible and near-infrared wavelength regions and exhibits high stability and superior solubility in aqueous conditions. A quenching dye composition containing the anthraquinone compound according to the present disclosure as an active ingredient can be widely used in the field of optical molecular imaging to observe the movement of a biomolecule because it can easily label a biomolecule manipulated in an aqueous buffer.