A Water-Soluble Fluorogenic Probe to Quantify Azide Concentrations in Biologically Relevant Environments

Area of Science:

• Chemical Biology
• Materials Science

Background:

• Fluorogenic probes are valuable for in situ detection of molecules in chemical biology and materials science.
• Existing alkyne-based probes for azide detection suffer from poor photophysical properties and aqueous solubility.
• There is a need for improved fluorogenic probes for physiological conditions.

Purpose of the Study:

• To develop a water-soluble fluorogenic probe for azide detection with enhanced fluorescence.
• To enable single-step labeling and analysis of biomolecules using the developed probe.
• To demonstrate the probe's utility in physiological conditions and biomaterial analysis.

Main Methods:

• Synthesis of a novel water-soluble fluorogenic probe for azides.
• Characterization of the probe's photophysical properties, including fluorescence enhancement.
• Application of the probe for quantifying azide densities on polymer scaffolds in PBS buffer.
• Functionalization of the probe with biomolecules for labeling and in situ analysis.

Main Results:

• The developed probe exhibits high fluorescence enhancement (130-fold increase).
• Accurate determination of azide densities on polymer scaffolds at low micromolar concentrations was achieved.
• The probe was successfully functionalized with biomolecules for single-step labeling and analysis.
• In situ monitoring of peptide conjugation to polymer scaffolds was demonstrated.

Conclusions:

• The novel water-soluble azide probe offers significant advantages over existing methods.
• The probe facilitates accurate biomolecule analysis under physiological conditions.
• This probe represents a promising tool for advancing chemical biology and (bio)material science research.