Thieno[3,2-b]pyridine-5(4H)-one Fluorophores for Reduced Blinking
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Solution Overview
Problem
Current fluorophores face issues with temporary switching between fluorescent and non-fluorescent states (blinking) and irreversible destruction (photobleaching), limiting their application in various industrial fields due to inadequate photophysical properties and stability.
Innovation Solution
Development of novel thieno[3,2-b] pyridine-5(4H)-one derivative compounds with broad emission wavelengths, synthesized through aza-[3+3] cycloaddition using BOP, which exhibit enhanced fluorescence characteristics and stability, suitable for various industrial applications including biology and medicine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluorophores are used, then fluorescence detection can be performed, but blinking and photobleaching occur reducing reliability
Solution Approach 1:
The patent modifies the molecular structure of fluorophores by introducing specific substituents (auxochromes) with extended n-electron systems and designing donor-acceptor type molecule systems. These structural parameter changes promote non-radioactive processes in excited states and photoinduced intramolecular charge transfer, thereby enhancing fluorescence stability and reducing blinking and photobleaching while extending the duration of fluorescent action.
Solution Approach 2:
The invention creates composite fluorophore structures by combining electron-donating groups and electron-accepting groups in specific molecular architectures. This composite approach at the molecular level enables synergistic effects that improve both the reliability and duration of fluorescence, solving the contradiction between stability and sustained emission.
2Ease of manufacture
If small molecule fluorophores are used, then synthetic accessibility and structural versatility are improved, but photophysical properties and stability are insufficient
Solution Approach 1:
The patent employs modular design of fluorophore molecules, dividing the structure into distinct functional segments: a central scaffold, electron-donating substituents, and electron-accepting substituents. This segmentation allows independent optimization of each component for both synthetic accessibility and photophysical performance, enabling easy manufacturing while achieving enhanced stability through systematic molecular engineering.
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 thieno[3,2-b] pyridine-5(4H)-one derivative compounds offer improved fluorescence properties with a broad spectrum of emission wavelengths, reducing blinking and photobleaching, thus enhancing their utility in physical, chemical, and biomedical research.
Implementation Method 1
A fluorophore is used for monitoring an analysis subject at a molecular or supermolecular level in a non-destructive manner... small molecule fluorophores having advanced photophysical properties... wide range of emission wavelengths
Implementation Method 2
promoting a non-radioactive process in an excited state, and a photoinduced intramolecular charge transfer (ICT) process across the donoo-acceptor (D-A) type molecule system
Data Source
AI summary
The present invention relates to a novel thieno[3,2-b]pyridine-5(4H)-one derivative compound, a preparation method thereof, and a use thereof. The novel thieno[3,2-b]pyridine-5(4H)-one derivative compound according to the present invention is synthesized via an aza-[3+3] cyclization addition reaction using BOP, wherein the compound is obtained by synthesizing a 4-arylthiophen-3-amine in which aryl groups such as 4-piperidyl-C6H4, 4-pyrrolidyl-C6H4, 4-MeOC6H4, 3,4,5-(MeO)3C6H4, C6H5, 4-C6H5C6H4, and 4-F3COC6H4 are introduced via a synthesis process by a bromination reaction, a hydrolysis reaction, a decarboxylation reaction, and a Suzuki coupling reaction of methyl 3-aminothiophene carboxylate, and by synthesizing 4-arylthiophen-3-amine and mono-methyl fumarate via a formal aza-[3+3] cyclization addition reaction using BOP and conjugation. Accordingly, novel thieno[3,2-b]pyridine-5(4H)-one derivative compounds according to the present invention have fluorescence properties with a wide range of emission wavelengths and thus may be utilized in various industrial fields such as physics, chemistry, and biomedical research.