Azo Compound Quencher Broad Absorption Stability
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Solution Overview
Problem
Conventional quenchers in fluorescence resonance energy transfer (FRET) systems have limitations such as instability during oligomer synthesis and purification, narrow wavelength absorption, and poor performance in detecting target molecules in biological and chemical applications.
Innovation Solution
A novel azo compound-based quencher with a broad absorption region, designed to quench fluorescence across a wider wavelength range, is developed, allowing for stable synthesis and use in various applications, including real-time PCR, by employing a specific structure and method involving sequential azo coupling reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional quenchers (BHQ1, BHQ2, BHQ3) are used, then fluorescence quenching is achieved in the 500-700 nm range, but stability during oligomer synthesis and purification deteriorates
Solution Approach 1:
The patent modifies the chemical structure parameters of conventional BHQ quenchers by changing the electron donor component from dialkylaniline to different aniline derivatives (e.g., 2,5-dimethoxyaniline, 2-methoxy-5-methylaniline) and adjusting the linker structures. These parameter changes in molecular structure improve stability during oligomer synthesis while preserving the essential diazo bond structure needed for fluorescence quenching function.
Solution Approach 2:
The patent creates composite quencher molecules combining specific electron donor units (aniline derivatives with hydroxyl, methoxy, or methyl groups), diazo linkers, and electron acceptor units (benzothiazole, benzoxadiazole, or triazole rings). This composite structure integrates the stability benefits of specific functional groups with the quenching capability of the diazo bond system, resolving the contradiction between stability and quenching performance.
2Adaptability or versatility
If quenchers with narrow wavelength absorption are used, then synthesis simplicity is maintained, but detection versatility deteriorates
Solution Approach 1:
The patent changes the absorption wavelength parameters of quenchers by selecting electron donor units with different conjugation degrees and substituent patterns (hydroxyl, methoxy, methyl groups at specific positions). These parameter changes extend absorption ranges while maintaining reasonable structural complexity through systematic molecular design rather than random complexity increase.
Solution Approach 2:
The patent designs quencher structures with universal applicability by using模块化 (modular) components that can be combined in different configurations. The standardized electron donor-acceptor-diazo-acceptor-donor framework with variable substituents creates a universal platform that works across multiple wavelength ranges and can be adapted to different fluorophore-quencher pairs, enhancing detection versatility without proportionally increasing complexity.
3Object-generated harmful factors
If fluorescent quenchers are used, then energy transfer occurs, but background noise increases due to fluorescence emission
Solution Approach 1:
The patent converts the potentially harmful fluorescence emission of quenchers into a beneficial non-fluorescent energy dissipation pathway. By designing dark quencher structures with diazo bonds that favor non-radiative decay and heat emission over fluorescence, the patent eliminates background noise while preserving energy transfer function. The harm of reduced energy transfer efficiency is compensated by optimizing the spatial arrangement and electronic coupling between fluorophore and quencher.
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 novel azo compound quencher provides enhanced fluorescence quenching capabilities across a broader wavelength range, stability during synthesis, and improved detection sensitivity in biological and chemical assays, enabling the use of various fluorophores and efficient oligonucleotide synthesis.
Implementation Method 1
Fluorescence resonance energy transfer (FRET) quenching is a phenomenon in which an energy donor, a reporter excited by light, transfers its energy to an energy acceptor that is a quencher neighboring thereto
Implementation Method 2
light energy from the energy donor is absorbed into the absorption region of the energy acceptor
Data Source
AI summary
The present invention provides a novel azo compound having a quenching ability for the material that exhibits a luminescent phenomenon at an excited energy level, a quencher comprising the novel azo compound, a use of the quencher and a method for preparing the azo compound. The quencher according to the present invention may exhibit excellent characteristics in a wavelength absorption region.