Sulfo-Cyanine7.5 alkyne

Sulfo-Cyanine7.5 alkyne is a sulfonated cyanine dye bearing a terminal alkyne for copper-free click conjugation workflows, enabling robust fluorescent labeling of biomolecules and materials with minimal dye aggregation. Its near-infrared fluorescence is particularly valued for low-background imaging and for multi-color experiments where reduced autofluorescence is advantageous. In practice, the sulfonate functionality supports aqueous handling, making it a common fluorophore building block for constructing fluorescent conjugates and imaging reagents.

1. Biomolecule Fluorescent Labeling

Sulfo-Cyanine7.5 alkyne is used as a fluorophore tag in protein and peptide labeling workflows where researchers need stable near-infrared readout for microscopy, imaging, and fluorescence-based quantification. In typical bioconjugation pipelines, the alkyne handle is incorporated into biomolecules (or introduced via an intermediate linker) and then coupled to azide-functional partners to generate fluorescent conjugates for tracking binding, uptake, or distribution in biochemical assays. The dye's sulfonated character supports aqueous conjugation and downstream handling during assay development.

2. Fluorescent Probe Construction

Sulfo-Cyanine7.5 alkyne serves as a key component in fluorescent probe development for molecular imaging reagent libraries, including labeling strategies for targeting ligands, affinity reagents, and assay-compatible reporters. Researchers frequently use the dye to build near-infrared probes that can be integrated into larger constructs such as multivalent binders, imaging standards, or platform-specific reporters where the alkyne provides a convenient chemical handle for click-based assembly. This approach is common in chemical biology and biomaterials research groups developing modular probe architectures for screening and visualization.

3. Biomaterial And Surface Functionalization

Sulfo-Cyanine7.5 alkyne is applied in the fluorescent functionalization of hydrophilic biomaterials and engineered surfaces to enable spatial visualization of coatings, hydrogels, and scaffold components. By click-coupling the dye to azide-bearing polymer networks, nanoparticles, or surface chemistries, researchers can generate stable, near-infrared fluorescent materials for studying material distribution, surface remodeling, and transport in microscopy-based experiments. The sulfonate group supports aqueous processing conditions, which is helpful for preparing labeled constructs compatible with common imaging workflows.