Reversible Fluorescent Probe for Hydrogen Peroxide via PET
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Solution Overview
Problem
Traditional fluorescent probes for detecting hydrogen peroxide face challenges such as poor water solubility, side reactions in cellular contexts, need for external enzymes, irreversible oxidation, and lack of membrane permeability, limiting their reversibility and effectiveness in biological applications.
Innovation Solution
A compound with a chemical structure conforming to Formula I, comprising a fluorophore (F) that absorbs and emits energy at specific wavelengths, a quencher (Q) that undergoes reversible oxidation, and a linker (L) that connects F and Q, allowing for photo-induced electron transfer (PET) mechanisms to detect hydrogen peroxide reversibly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fluorescent probes are used to detect hydrogen peroxide, then detection sensitivity is achieved, but the probes undergo irreversible oxidation and cannot be used repeatedly
Solution Approach 1:
The patent changes the oxidation state parameter of the probe molecule from irreversible to reversible. The probe is designed with a chromophore that can cycle between oxidized and reduced forms, allowing it to return to its original state after detecting hydrogen peroxide. This parameter change enables repeated use of the probe without degradation.
Solution Approach 2:
The patent implements a feedback mechanism where the oxidized probe form can be reduced back to its original state through chemical or enzymatic reduction. This feedback loop allows the probe to reset and be reused, transforming a one-time detection into a repeatable measurement process.
2Measurement precision
If traditional probes are designed with specific molecular structures, then detection capability is improved, but water solubility and membrane permeability are compromised
Solution Approach 1:
The patent applies local quality modification by introducing hydrophilic groups or functional moieties at specific locations in the probe molecule. These localized modifications enhance water solubility and membrane permeability without compromising the core chromophore's detection capability, allowing the probe to function effectively in aqueous and cellular environments.
3Measurement precision
If probes are designed to respond to hydrogen peroxide, then detection sensitivity is achieved, but side reactions with cellular thiols occur
Solution Approach 1:
The patent converts the potential harm of thiol interactions into a beneficial selective detection mechanism. The probe is designed such that its oxidation by hydrogen peroxide is the primary and desired reaction, while the molecular structure is modified to minimize or eliminate unwanted side reactions with cellular thiols. The oxidized form of the probe can be reduced back, allowing controlled and specific detection.
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 compound enables reversible detection of hydrogen peroxide, overcoming traditional probe limitations by providing a sensitive and reversible fluorescence response, suitable for quantitative and qualitative analysis in biological samples.
Implementation Method 1
F comprises a fluorophore that is capable of absorbing energy at an excitation wavelength and, in the absence of a quencher, emitting energy at an emission wavelength
Implementation Method 2
The compound of formula I is capable of undergoing a reversible reaction... provided below... Q comprises a quencher... capable of absorbing energy from F via a PET quenching mechanism
Implementation Method 3
Ox comprises an oxidizing agent, which is capable of oxidizing Q to its oxidized form Q+
Implementation Method 4
Red comprises a reducing agent, which is capable of converting Q+ back to its reduced form Q
Data Source
AI summary
The invention provides compounds of formula I F-L-Q (I) where F comprises a fluorophore capable of absorbing energy at an excitation wavelength and, in the absence of a quencher, emitting energy at an emission wavelength, which is different than the excitation wavelength; Q comprises a quencher; L comprises a linker moiety having two ends, one end being covalently bound to F and the other end being covalently bound to Q. The compounds are capable of undergoing a reversible reaction (1), provided below: (1) where Q+ is an oxidized form of Q representing the absence of a quencher, Ox comprises an oxidizing agent, which is capable of oxidizing Q to its oxidized form Q, and Red comprises a reducing agent, which is capable of converting Q back to its reduced form Q. The compounds can undergo photo-induced electron transfer when irradiated with energy and when Q exists in its oxidized form, Q+. The invention also provides methods of detecting and determining the presence of analytes and/or hydrogen peroxide in a sample, as well as a substrate that comprises the compound of formula I.