Polymeric Tandem Dyes Using Hetero-Energy Transfer
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Solution Overview
Problem
Existing fluorescent dyes suffer from self-quenching and low quantum yields due to homo-energy transfer among pendant chromophores, limiting their effectiveness in molecular recognition and labeling applications.
Innovation Solution
Development of water-soluble light harvesting multichromophores with a polymeric backbone and pendant donor chromophore groups, along with an acceptor fluorophore linked in energy-receiving proximity, to facilitate hetero-energy transfer and enhance emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple pendant chromophores are used to enhance light harvesting, then light absorption capability is improved, but self-quenching and low quantum yields occur due to homo-energy transfer
Solution Approach 1:
The system is segmented into distinct functional components: light-harvesting antenna chromophores (for absorption) and a separate fluorophore (for emission). This segmentation allows each component to perform its specialized function without the interference of homo-energy transfer, as the energy transfer is hetero- (between different chromophore types) rather than homo- (among identical chromophores).
Solution Approach 2:
The patent introduces an intermediary energy transfer mechanism where antenna chromophores transfer energy to a fluorophore mediator, which then emits light. This intermediary step prevents direct homo-energy transfer between pendant chromophores, eliminating self-quenching while maintaining efficient light harvesting and high quantum yields.
2Quantity of substance
If pendant chromophore groups are linked to polymeric backbone to create multichromophores, then light harvesting capacity is enhanced, but homo-energy transfer causes energy loss
Solution Approach 1:
Different regions of the multichromophore system are assigned different functional qualities: antenna chromophores are optimized for light absorption (high extinction coefficients), while the fluorophore is optimized for emission (high quantum yield). This local differentiation ensures that each chromophore type performs its specialized function efficiently, minimizing energy loss through inappropriate energy transfer pathways.
Solution Approach 2:
The fluorophore acts as an intermediary that receives energy from multiple antenna chromophores and converts it to emitted light. This intermediary mechanism converts what would otherwise be lossy homo-energy transfer among identical chromophores into efficient hetero-energy transfer, significantly reducing energy loss while maintaining high light harvesting capacity.
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 solution significantly improves quantum yields and emission efficiency, enabling effective molecular recognition and labeling processes.
Implementation Method 1
facilitate hetero-energy transfer and enhance emission efficiency
Implementation Method 2
when irradiated with light of a wavelength which they absorb
Data Source
AI summary
Water soluble light harvesting multichromophores having pendant chromophore groups are provided. The light harvesting multichromophore has a polymeric backbone including non-conjugated repeat units and a plurality of pendant donor chromophore groups linked to a non-conjugated repeat unit of the polymeric backbone. A pendant chromophore group can be a BODIPY group substituted with one or more water soluble groups. Polymeric tandem dyes based on the subject multichromophores are provided that further include an acceptor fluorophore linked to a non-conjugated repeat unit of the polymeric backbone and configured in energy-receiving proximity to a pendant donor chromophore group. Also provided are labelled specific binding members that include the subject polymeric tandem dyes. Methods of evaluating a sample for a target analyte and methods of labelling a target molecule in which the subject polymeric tandem dyes find use are provided. Systems and kits for practicing the subject methods are also provided.