Polymethine Dyes with Alkyl-Phosphonate Groups for Enhanced Photostability
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Solution Overview
Problem
Luminescent compounds used in research face limitations such as low extinction coefficient, quantum yield, small Stokes' shift, wavelength-limited excitation, instability, difficulty penetrating cell membranes, and spectral overlap with biological samples, leading to suboptimal detection and analysis in assays and cell-based applications.
Innovation Solution
Development of polymethine dyes containing alkyl-phosphonate or substituted alkyl-phosphonate groups that enhance photostability, aqueous solubility, and spectral properties, allowing for improved penetration and retention within cells, and reducing aggregation, while maintaining or enhancing quantum yield and Stokes' shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional luminescent compounds are used, then detection methods can be performed, but the compounds suffer from low photostability, low quantum yield, small Stokes' shift, and wavelength-limited excitation
Solution Approach 1:
The patent applies composite materials by combining cyanine dye structures with phosphonate groups to create hybrid molecules that exhibit both the desirable optical properties of cyanines (high extinction coefficients,可调 excitation wavelengths) and the enhanced photostability and aqueous solubility of phosphonate-containing compounds. This composite approach resolves the contradiction by integrating two different molecular systems to achieve superior overall performance.
Solution Approach 2:
The patent employs parameter changes by systematically varying the phosphonate substituent groups (different alkyl chains, aromatic groups, cyclic structures) to optimize the balance between photostability, quantum yield, Stokes' shift, and aqueous solubility. By changing these molecular parameters, the invention achieves high photostability while maintaining可调 excitation wavelengths and adequate quantum yields.
2Quantity of substance
If conventional dyes are used, then assays can be performed, but they exhibit low aqueous solubility and tendency to aggregate
Solution Approach 1:
The patent uses parameter changes by introducing phosphonate groups with varying alkyl chain lengths and substitutions to systematically improve aqueous solubility. The phosphonate group's inherent polarity and ability to form hydrogen bonds with water, combined with可调 alkyl substituents, allow optimization of solubility while controlling aggregation through steric effects and hydrophobic interactions.
3Ease of operation
If conventional luminescent compounds are used, then detection can be performed, but they have difficulty penetrating cell membranes and show spectral overlap with biological samples
Solution Approach 1:
The patent applies parameter changes by developing compounds with excitation wavelengths in the 600-900 nm range, which falls within the optical transparency window of biological tissues. This wavelength parameter choice minimizes spectral overlap with biological autofluorescence (typically below 600 nm) while the phosphonate groups' hydrophilic-lipophilic balance facilitates passive cell membrane penetration.
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 dyes exhibit increased photostability, improved spectral properties, and enhanced aqueous solubility, enabling more effective and selective detection in assays and cell-based applications, with the ability to passively penetrate cells and remain trapped, reducing leakage.
Implementation Method 1
Photoluminescence is a particular type of luminescence that involves the absorption and subsequent re-emission of light. In photoluminescence, a luminophore is excited from a low-energy ground state into a higher-energy excited state by the absorption of a photon of light. The energy associated with this transition is subsequently lost through one or more of several mechanisms, including production of a photon through fluorescence or phosphorescence.
Implementation Method 2
The dyes exhibit increased photostability, improved spectral properties, and enhanced aqueous solubility
Data Source
AI summary
Dyes and photoluminescent compounds based on polymethine dyes that contain at least one alkyl-phosphonate or substituted alkyl-phosphonate group, including the synthetic precursors, methods of synthesis, and applications thereof. Certain embodiments include heterocyclic ring systems and polymethine linkages selected such that the resulting polymethine dye is a cyanine dye, a merocyanine dye or a styryl dye.