13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester is a click-chemistry functionalized, PEG-spaced azide-bearing lipid building block designed for bioorthogonal conjugation workflows. The reagent combines a long-chain fatty acid scaffold with an azide handle and a PEG9 linker that supports solubility and controlled spacing in complex mixtures. As an azide-containing component, it is commonly used in strain-promoted or copper-catalyzed azide–alkyne cycloaddition (CuAAC) strategies to attach biomolecules, targeting ligands, or imaging moieties to lipid-derived materials and assemblies.

1. Lipid Nanoparticle Surface Functionalization

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester is used as a lipid conjugation precursor for introducing azide functionality into lipid nanoparticle formulations and related lipid assemblies. Researchers incorporate the azide-bearing lipid to enable subsequent click attachment of fluorescent dyes, affinity ligands, or polymeric coatings, improving modularity during probe or material development. The PEG9 spacer helps reduce steric crowding at the particle interface, supporting more consistent labeling across batches of lipid-based constructs used in chemical biology and materials research.

2. Biomolecular Conjugation Handles

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester serves as a practical azide-bearing linker for generating click-ready conjugation handles on lipid-modified biomolecules. In common research workflows, the reagent is integrated into lipidated peptides, protein-binding constructs, or membrane-associated reagents to provide a defined attachment point for downstream coupling via azide–alkyne cycloaddition. The long aliphatic chain and PEG spacing are particularly useful when maintaining accessibility of the reactive handle in crowded biological environments such as cell-mimetic systems and membrane-like materials.

3. Molecular Imaging Probe Construction

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester is widely applied in the construction of azide-functional imaging probes that require controlled presentation of a labeling group at a lipid interface. Teams developing small-molecule or macromolecular imaging reagents use the azide handle to attach fluorophores or reporter groups through click chemistry, enabling rapid exchange of labels without redesigning the lipid scaffold. The PEG9 linker supports probe solubility and helps maintain efficient coupling to imaging tags during probe library generation for microscopy and molecular imaging method development.

4. Diagnostic Reagent and Assay Platforms

13-(Azide-PEG9-ethylcarbamoyl)tridecanoic t-butyl ester is used to build azide-functional surfaces and assay components where modular conjugation is required. In diagnostic reagent development, the reagent can be incorporated into lipid-coated materials, membrane-mimicking layers, or capture platforms to provide a standardized click handle for attaching detection reagents such as reporter dyes, affinity reagents, or signal-amplifying polymers. The combination of lipid anchoring and PEG9 spacing supports stable presentation of the reactive azide group, which is valuable when preparing reproducible assay surfaces and multiplexed reagent panels.