Chromophoric Polymer Dots With Narrow-Band Emission for Spectral Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fluorescent polymer dots (Pdots) exhibit broad emission spectra, limiting their effectiveness in multi-target detection and spectral multiplexing applications due to their full width at half maximum (FWHM) being too wide.
Innovation Solution
Development of polymer nanoparticles comprising condensed chromophoric polymers with narrow-band emissions, achieved by incorporating narrow-band emissive monomers such as BODIPY, squaraine, metal complexes, and others, resulting in FWHM less than 70 nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional wide-band fluorescent polymers are used for whole-slide imaging, then broad spectral coverage is achieved, but spectral overlap between fluorophores occurs leading to loss of spatial and spectral resolution
Solution Approach 1:
The invention segments the broad emission spectrum into multiple narrow-band emissions (e.g., 40-60 nm FWHM) by using polymers with distinct chromophores. Each chromophore emits at a specific narrow wavelength range, allowing multiple fluorophores to be imaged simultaneously without spectral overlap, thus maintaining both spectral coverage and resolution
Solution Approach 2:
The invention changes the emission bandwidth parameter from wide-band (conventional) to narrow-band (40-60 nm FWHM) while maintaining high quantum yield. This is achieved by selecting and synthesizing polymers with specific chromophores that inherently emit narrow-band light, enabling precise spectral discrimination
2Measurement precision
If quantum dots are used to achieve narrow emission bands, then spectral resolution is improved, but cytotoxicity and instability issues arise
Solution Approach 1:
The invention replaces unstable quantum dots with stable, biocompatible polymers that can be functionalized with cell-penetrating peptides. These polymers are designed to be transient imaging agents that fulfill the imaging function without the long-term stability issues of quantum dots, maintaining reliability in biological systems
Solution Approach 2:
The invention creates composite fluorescent probes by combining narrow-band emitting polymers with functional moieties such as cell-penetrating peptides (e.g., TAT peptide). This composite structure maintains the optical advantages of narrow-band emission while adding biological compatibility and targeting capabilities, resolving the stability-safety contradiction
3Adaptability or versatility
If multiple fluorophores with wide emission spectra are used, then spectral coverage is maximized, but unmixing algorithms fail due to spectral overlap
Solution Approach 1:
The invention extracts the problematic spectral overlap by using polymers with inherently narrow emission bands (40-60 nm FWHM). By taking out the broad emission tails that cause overlap, multiple fluorophores can be imaged simultaneously with minimal spectral crosstalk, eliminating the need for complex unmixing algorithms and simplifying data processing
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 narrow-band emissions enable enhanced spectral resolution for multi-target detection and improved sensitivity in fluorescence-based applications, facilitating better spectral multiplexing and bioconjugation capabilities.
Implementation Method 1
highly fluorescent chromophoric polymer dots with narrow-band emissions are provided
Data Source
Figure 1(A)~1(F)
Figure 1(G)~1(L)
Figure 2A
AI summary
Polymers, monomers, chromophoric polymer dots and related methods are provided. Highly fluorescent chromophoric polymer dots with narrow-band emissions are provided. Methods for synthesizing the chromophoric polymers, preparation methods for forming the chromophoric polymer dots, and biological applications using the unique properties of narrow-band emissions are also provided.