Azido-PEG10-azide | CAS 1421783-42-7

Azido-PEG10-azide is a PEG-based bifunctional linker bearing two terminal azide groups, designed for copper-catalyzed azide–alkyne cycloaddition (CuAAC) and related click chemistry workflows. Its flexible, hydrophilic PEG spacer helps improve solubility and reduces steric constraints when installing or crosslinking azide-functional materials. Because it provides two reactive azide handles, it is widely used to build multivalent conjugates, define linker length in bioconjugation, and enable modular assembly of imaging and diagnostic research tools.

1. Multivalent Probe Conjugation

Azido-PEG10-azide is commonly used to generate multivalent chemical probes by linking two alkyne-bearing components through CuAAC click coupling. In chemical biology and molecular imaging tool development, the dual-azide format supports the construction of higher-order binding scaffolds and signal-amplifying probe architectures where spacing and flexibility are important for maintaining target accessibility. The PEG10 spacer is frequently selected to balance aqueous compatibility with controllable inter-component distance, which can be advantageous when preparing libraries of conjugates for screening and assay optimization.

2. Surface Coating And Patterning

Azido-PEG10-azide is used in materials and biomaterials research to introduce azide functionality onto surfaces or to create azide-rich interfaces prior to subsequent click attachment of biomolecules, polymers, or reporter groups. Dual azide termini enable crosslinking strategies with bis-alkyne reagents or stepwise assembly routes that improve control over surface density and spacing of immobilized ligands. This application is particularly relevant for developing functional coatings for biosensing platforms, cell-interaction studies, and research-grade assay substrates where reproducible surface chemistry is required.

3. Hydrogel Crosslinking Platforms

Azido-PEG10-azide serves as a building block for PEG-based hydrogel and soft-material crosslinking schemes that rely on click chemistry to connect polymer networks. By providing two azide reactive sites, it can be incorporated into network-forming formulations alongside alkyne-functional crosslinkers, enabling modular tuning of gel architecture through linker selection. Researchers often choose Azido-PEG10-azide to obtain hydrophilic, flexible linkages that support homogeneous network formation and compatibility with aqueous processing conditions used in biomaterials fabrication.

4. Imaging Tag And Reporter Assembly

Azido-PEG10-azide is frequently employed to assemble imaging tags and reporter constructs that require defined linker length between functional moieties. The bifunctional azide design allows sequential or combinatorial click conjugation to alkyne-bearing fluorophores, affinity handles, or scaffold components, supporting rapid generation of probe variants for microscopy, flow-based assays, and molecular imaging development. In diagnostic reagent development workflows, it is also used as a modular spacer to standardize conjugate architecture across batches, which helps maintain consistent labeling geometry for research tool characterization.