4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne | CAS 185378-83-0

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne is a polyether-based diyne building block that is commonly employed as a linear alkyne handle for click chemistry workflows, particularly in copper-catalyzed azide–alkyne cycloaddition (CuAAC) and related alkyne-based conjugations. Its extended, oxygen-rich backbone provides solubility and conformational flexibility, making it useful for constructing well-defined multivalent linkers, functional biomaterials, and imaging or assay reagents. In research settings, this diyne motif is typically leveraged to introduce two reactive alkyne termini into larger constructs such as polymers, surfaces, and nanoparticle coatings.

1. Multivalent Probe Conjugation

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne is widely used to build multivalent chemical probes where two orthogonal or sequentially addressable coupling sites are required. By incorporating this diyne linker into probe platforms, researchers can attach azide-bearing targeting ligands, affinity tags, or reporter moieties to generate higher local density than monofunctional linkers. This approach is common in chemical biology for mapping binding events, optimizing labeling density on biomolecules, and creating modular probe libraries for screening assay formats.

2. Polymer And Surface Functionalization

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne supports the preparation of functional polymers and coatings that require reactive alkyne termini for downstream CuAAC coupling. Materials scientists use this type of diyne to introduce defined crosslinking or grafting points onto polymer backbones, hydrogel networks, or solid supports, enabling controlled installation of bioactive groups such as azide-functional peptides, carbohydrates, or capture handles. The oxygen-rich character of the linker often helps maintain compatibility with aqueous processing steps used in biomaterials fabrication and surface chemistry.

3. Nanoparticle And Coating Assembly

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne is used in nanoparticle conjugation strategies where two coupling sites can improve the stability and uniformity of surface functionalization. In molecular imaging reagent development and materials characterization workflows, the diyne linker can be incorporated into surface ligands or interfacial layers, followed by azide-based attachment of fluorescent dyes, affinity ligands, or other reporting groups. This enables reproducible assembly of coated nanoparticles for labeling, tracking, and platform validation in chemical biology and analytical research.

4. Diagnostic Reagent Building Blocks

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne is applied as a versatile alkyne-containing linker for constructing diagnostic assay components that rely on click-compatible immobilization chemistries. Assay developers incorporate diyne linkers to connect azide-functional capture reagents, signal reporters, or scaffold elements onto assay surfaces and reagent cartridges, supporting modular design of multiplexable formats. The ability to install two reactive termini within a single building block is particularly useful for tuning spacing between functional groups and improving the robustness of reagent architectures used in research diagnostics workflows.

5. Imaging And Fluorescent Labeling Platforms

4,7,10,13,16,19-Hexaoxadocosa-1,21-diyne is commonly used to generate fluorescent labeling and imaging reagent platforms that require reliable alkyne handles for azide-based attachment of dyes or imaging reporters. Researchers use this diyne to create multicomponent labeling constructs, such as dye–ligand conjugates or scaffolded reporter systems, where linker length and flexibility influence how labels present to targets in experimental assays. The extended polyether backbone can help maintain solubility and reduce aggregation tendencies during labeling and wash steps, supporting consistent probe preparation for microscopy and analytical imaging workflows.