DBCO-PEG10-DBCO | CAS 2096516-12-8

DBCO-PEG10-DBCO is a bifunctional, strain-promoted azide–alkyne cycloaddition (SPAAC) click chemistry reagent featuring two DBCO (dibenzocyclooctyne) groups connected through a PEG10 linker. This design enables efficient, catalyst-free conjugation to azide-bearing biomolecules, surfaces, or materials while providing multivalency and spacing effects that can improve coupling control and reduce steric constraints. The dual-reactive nature makes it particularly relevant for constructing crosslinked networks, multivalent probes, and modular imaging or assay platforms where orthogonal, rapid surface functionalization is required.

1. Multivalent Probe Conjugation

DBCO-PEG10-DBCO is widely used to generate multivalent azide-reactive probes for chemical biology and molecular imaging workflows, where increased local ligand density can enhance binding site presentation on the probe rather than altering the chemistry itself. Researchers commonly employ the reagent to connect two azide-bearing components into a single construct, such as linking targeting ligands to fluorophores, affinity tags, or nucleic-acid handles that are introduced as azide-functionalized building blocks. The PEG10 spacer helps maintain probe flexibility and reduces steric crowding during conjugation, supporting more consistent labeling across heterogeneous biomolecular preparations.

2. Surface Patterning And Coatings

DBCO-PEG10-DBCO supports click-based functionalization of azide-terminated surfaces used in biosensor development, cell-interaction studies, and biomaterials research. In these applications, the reagent serves as a dual-D BCO crosslinker that can bridge azide groups on patterned substrates, enabling the creation of stable, covalently attached layers that are resistant to wash-induced loss. The PEG spacer is frequently selected to tune interfacial spacing and reduce nonspecific steric effects, which is valuable when immobilizing proteins, peptides, or polymeric capture elements onto surfaces for downstream assay readouts and imaging experiments.

3. Crosslinked Hydrogel And Network Formation

DBCO-PEG10-DBCO is used to build azide-reactive hydrogel systems and polymer networks through SPAAC-mediated crosslinking, providing a practical route to materials with tunable connectivity and mechanical behavior. Biomaterials groups often incorporate this reagent to connect azide-functional polymers, peptides, or macromolecular precursors into three-dimensional architectures used for cell culture platforms, diffusion studies, and controlled presentation of biochemical cues. The bifunctional DBCO functionality enables network formation without copper catalysts, which is advantageous for sensitive components and for workflows where catalyst removal is undesirable.

4. Imaging Reagents And Enzyme Labels

DBCO-PEG10-DBCO is commonly applied in the preparation of imaging reagents and labeled biomolecular tools by bridging azide-functional tags to DBCO-reactive imaging moieties or reporter constructs. Molecular imaging and diagnostic reagent development teams frequently use the reagent to assemble modular conjugates where a PEG-based linker helps preserve the accessibility of reactive groups and the spatial arrangement of labels. Dual reactivity also supports multicomponent assembly strategies, enabling researchers to incorporate multiple reporters, affinity handles, or scaffold elements into a single azide-to-DBCO-linked construct for streamlined probe generation.