Boron-Based Voltage-Sensitive Dyes for Cell Membrane Detection
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Solution Overview
Problem
Conventional voltage-sensitive dyes suffer from limitations such as low specificity, low signal-to-noise ratio, slow responsivity, low sensitivity, and poor photostability, which hinder accurate measurement of voltage changes across cell membranes.
Innovation Solution
Development of voltage-sensitive dyes comprising boron as an electron acceptor, attached to electron donating and polar groups, which enhance specificity, signal-to-noise ratio, responsivity, sensitivity, and photostability, with a maximum absorbance wavelength greater than or equal to 600 nm, allowing for improved voltage measurement across cell membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional voltage-sensitive dyes are used, then voltage measurement capability is provided, but specificity is low and signal-to-noise ratio is poor
Solution Approach 1:
The patent modifies the chemical structure of voltage-sensitive dyes by incorporating boron atoms into the molecular framework and optimizing substituents to achieve an absorption maximum at or above 600 nm. This parameter change in the dye's optical properties enhances both measurement precision and reliability by improving signal detection capability and specificity for voltage changes.
Solution Approach 2:
The invention creates composite voltage-sensitive dye molecules by combining boron-containing core structures with specific electron-donating and electron-withdrawing groups. This composite molecular design integrates multiple functional components that work synergistically to enhance both the precision and reliability of voltage measurements simultaneously.
2Measurement precision
If conventional voltage-sensitive dyes are used, then voltage detection is enabled, but responsivity is slow and sensitivity is low
Solution Approach 1:
The patent optimizes molecular parameters of the voltage-sensitive dyes, specifically tuning the HOMO-LUMO energy gap through boron incorporation and substituent selection. This results in faster electron redistribution in response to voltage changes, thereby improving both sensitivity and responsivity without compromise.
Solution Approach 2:
The invention enhances the dynamic response of the dye molecules to voltage changes by designing structures with delocalized π-electron systems that facilitate rapid electron reorganization. This dynamic electron redistribution enables the dye to quickly track voltage fluctuations, improving both speed and sensitivity of detection.
3Duration of action of stationary object
If conventional voltage-sensitive dyes are used, then voltage measurement is possible, but photostability is poor
Solution Approach 1:
The patent designs composite dye molecules with boron-centered core structures surrounded by protective electron-donating and electron-withdrawing groups. This composite structure distributes electronic stress and protects the chromophore from photodegradation, maintaining both long-term photostability and measurement precision throughout extended observation periods.
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 boron-containing voltage-sensitive dyes exhibit high specificity, fast responsivity, and high sensitivity, enabling precise measurement of voltage changes across cell membranes with improved photostability and reduced noise, facilitating advancements in cell differentiation, tissue regeneration, and wound healing.
Implementation Method 1
a maximum absorbance wavelength in methanol of the voltage-sensitive dye is greater than or equal to about 600 nm
Data Source
AI summary
Voltage sensitive dyes comprising boron and related compositions and methods are provided. In some embodiments, a voltage sensitive dye comprises an electron acceptor comprising boron. The electron acceptor may be attached (e.g., covalently) to at least one electron donating group and at least one polar group. For instance, the electron acceptor may comprise optionally substituted boron dipyrromethene (e.g., optionally substituted 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene). The point of attachment and chemical nature of the electron donating group(s) and polar group(s) may be selected to impart beneficial properties to the voltage sensitive dye. For instance, the voltage sensitive dye may have an extended difference in the dipole moment between the ground and electronic states due at least in part to the position of the electron donating group(s). The voltage sensitive dyes, described herein, may have high specificity, high signal to noise ratio, fast responsivity, high voltage sensitivity, high photostability, and/or high brightness.