DBCO-mPEG, MW 5,000

DBCO-mPEG, MW 5,000 is a dibenzocyclooctyne (DBCO) functionalized methoxy polyethylene glycol (mPEG) conjugate designed for copper-free strain-promoted azide–alkyne cycloaddition (SPAAC) click chemistry. The PEG chain provides strong aqueous compatibility, steric shielding, and tunable hydrodynamic behavior, while the DBCO moiety enables fast, selective coupling to azide-bearing biomolecules, polymers, nanoparticles, and surfaces. This combination is widely used in bioconjugation workflows where stable PEGylated constructs, surface functionalization, and modular assembly of click-ready materials are required.

1. PEGylated Bioconjugates

DBCO-mPEG, MW 5,000 is commonly used to generate PEGylated bioconjugates by reacting with azide-functional targets such as azide-tagged peptides, proteins, antibodies fragments, or engineered binding scaffolds. The PEG spacer improves colloidal stability and reduces nonspecific interactions in aqueous assay buffers, which is particularly valuable for preparing robust conjugates for downstream analytical workflows. Researchers also use DBCO-mPEG, MW 5,000 to introduce a defined, hydrophilic linker length that can modulate accessibility of functional groups on the conjugate, supporting reproducible probe construction for molecular imaging and chemical biology studies.

2. Nanoparticle Surface Functionalization

DBCO-mPEG, MW 5,000 is frequently applied to functionalize nanoparticle surfaces and to create sterically stabilized, click-ready colloidal platforms. By coupling the DBCO group to azide-bearing ligands or coatings, teams can install PEG layers that help control aggregation and improve handling of nanoparticles in complex media. This reagent is also used to build modular nanoparticle conjugates for fluorescence or affinity-based labeling strategies, where azide-functional targeting components are assembled onto pre-formed particles using copper-free conditions that preserve sensitive materials.

3. Hydrogel and Polymer Crosslinking

DBCO-mPEG, MW 5,000 is used in polymer and biomaterials development to incorporate PEG spacers into azide-functional hydrogels and polymer networks via SPAAC-compatible coupling. In materials workflows, the PEG chain can tune swelling behavior, mechanical response, and diffusion characteristics of embedded biomolecular or chemical cargo by adjusting hydrophilicity and steric effects. The reagent’s click handle supports straightforward post-functionalization of polymer precursors, enabling iterative design of functionalized matrices for research-grade delivery materials, cell-interaction platforms, and responsive material systems.

4. Molecular Imaging Probe Assembly

DBCO-mPEG, MW 5,000 is well suited for assembling imaging and detection probes where PEGylation improves solubility and reduces background signal from nonspecific adsorption. Probe developers often use it as a click-compatible PEG linker to attach azide-containing fluorophores, affinity tags, or reporter motifs to DBCO-bearing scaffolds or carriers under copper-free conditions. The MW 5,000 PEG length is particularly useful when a longer aqueous interface is desired to balance brightness, stability, and ease of conjugate handling during probe optimization and labeling workflows.

5. Diagnostic Reagent Conjugation

DBCO-mPEG, MW 5,000 is used to create conjugated diagnostic reagents and assay components that require stable, water-compatible linker architectures. In laboratory and industrial reagent development, azide-functional capture elements, reporter labels, or surface chemistries are frequently coupled to DBCO-mPEG to produce PEG-modified conjugates that show improved dispersion and reduced nonspecific binding in assay buffers. The reagent supports scalable, modular assembly of click-ready components for multiplexing and standardized reagent formats, where consistent PEG spacing and reliable coupling chemistry are important for reproducible assay performance.