Azido-PEG1-amine | CAS 464190-91-8

Azido-PEG1-amine is a polyethylene glycol (PEG)-based primary amine functionalized with an azide handle, designed for bioorthogonal click chemistry workflows that rely on azide–alkyne cycloaddition. The short PEG spacer provides aqueous solubility and reduces nonspecific interactions while maintaining accessibility of the azide for downstream conjugation. As a versatile linker building block, Azido-PEG1-amine is commonly used to introduce azide functionality into biomolecule, polymer, or surface platforms that are subsequently modified with cyclooctyne or alkyne-bearing partners for probe, material, and imaging reagent construction.

1. Biomolecule Conjugation

Azido-PEG1-amine is frequently used to install an azide-bearing PEG linker onto proteins, peptides, and other biomolecular scaffolds where an amine-reactive handle enables straightforward incorporation into labeling or capture strategies. Researchers use the PEG spacer to improve conjugate solubility and to help preserve binding or recognition properties of the biomolecule after functionalization. The resulting azide-functional conjugates are then compatible with click-compatible fluorophores, affinity tags, or polymeric reporters, supporting modular assay development and multiplexing workflows.

2. Surface And Material Functionalization

Azido-PEG1-amine is well suited for functionalizing polymer films, hydrogels, and other material surfaces that require stable presentation of azide groups for subsequent click coupling. The PEG segment can reduce steric hindrance at the interface and improve accessibility of the azide to alkyne-containing reagents during surface modification steps. This makes the reagent useful in building reactive material coatings, immobilized probe arrays, and reagent-bearing platforms where spatially controlled attachment of imaging labels or analytical handles is required.

3. Molecular Imaging Probe Building

Azido-PEG1-amine is commonly employed as a linker component in the construction of molecular imaging and detection probes that need a bioorthogonal attachment point. By providing an azide functionality with a short PEG spacer, the reagent supports conjugation to alkyne-functional imaging moieties, enabling efficient assembly of probe candidates for fluorescence-based readouts, enrichment workflows, and analytical labeling schemes. In many laboratory settings, the amine functionality also supports coupling to carrier scaffolds, facilitating standardized probe formats for screening and method development.

4. Diagnostic Reagent Development

Azido-PEG1-amine is used in the development of diagnostic and analytical reagents that benefit from modular, click-based assembly of recognition elements with signal reporters. The azide handle enables rapid interchange of reporter components such as fluorophores, enzyme mimics, or other alkyne-functional detection tags, while the PEG spacer helps maintain reagent solubility and reduces aggregation during assay preparation. This approach supports the creation of standardized labeling reagents and conjugate libraries used in research diagnostics and workflow optimization for analytical platforms.