Propargyl-PEG11-methane | CAS 2250411-18-6

Propargyl-PEG11-methane is a PEGylated propargyl ether click chemistry reagent designed for copper-free or copper-catalyzed conjugation workflows that rely on the terminal alkyne functionality. As a long-chain PEG linker, it provides strong solubility and spacing effects that are valuable when attaching biomolecules, polymers, or surfaces while minimizing steric crowding. This reagent is commonly used as a modular “alkyne handle” for downstream bioconjugation, materials functionalization, and molecular imaging probe assembly.

1. PEGylated Bioconjugation Handles

Propargyl-PEG11-methane is frequently used as an alkyne-bearing spacer to prepare PEGylated bioconjugates for research-grade labeling and coupling strategies. The extended PEG11 segment helps maintain water solubility and can reduce nonspecific interactions during probe preparation, which is particularly useful when attaching bulky ligands, proteins, or multi-component constructs. In typical workflows, the reagent serves as a convenient building block to introduce a terminal alkyne for subsequent click-based assembly with azide-functional partners, enabling flexible design of labeled biomolecules, affinity reagents, and reagent-ready conjugates used across chemical biology and biomaterials laboratories.

2. Surface and Polymer Functionalization

Propargyl-PEG11-methane is well suited for functionalizing polymeric materials and engineered surfaces where controlled presentation of reactive handles is required. The PEG chain contributes to antifouling-like behavior and improved dispersion of functional groups in aqueous processing steps, which supports reproducible surface chemistry and uniform modification. Researchers often incorporate Propargyl-PEG11-methane to install alkyne groups on coatings, hydrogels, or polymer scaffolds, creating stable, clickable platforms for later attachment of targeting motifs, capture ligands, or reporter components in materials science and diagnostic reagent development.

3. Molecular Imaging Probe Assembly

Propargyl-PEG11-methane is commonly used to build alkyne-containing intermediates for molecular imaging and reporting probe construction in preclinical research settings. The PEG11 spacer supports conjugate solubility and helps tune effective distance between the imaging reporter and the targeting or recognition element, which can improve probe handling and reduce aggregation during formulation. By providing a terminal alkyne handle, Propargyl-PEG11-methane enables modular coupling to azide-bearing fluorophores, affinity tags, or other signal units, supporting rapid iteration of probe architectures for microscopy, fluorescence-based assays, and imaging reagent pipelines.

4. Diagnostic Reagent Development

Propargyl-PEG11-methane is applied in the development of diagnostic and assay reagents where robust, modular conjugation chemistry is needed to generate consistent labeling reagents. The PEG linker is advantageous for preparing clickable assay components that remain soluble through typical assay preparation conditions and can be incorporated into multi-step reagent workflows. Teams in diagnostic reagent development use Propargyl-PEG11-methane to introduce alkyne functionality into capture reagents, labeling standards, or assay-building blocks, allowing subsequent assembly with azide-functional partners to produce well-defined, reagent-ready conjugates for analytical and research assay formats.