Cyanine7 alkyne | CAS 1998119-13-3

Cyanine7 alkyne is a reactive cyanine dye bearing an alkyne handle for click chemistry labeling. As a far-red fluorescent scaffold, it is commonly incorporated into bioconjugates and imaging reagents where bright, low-background fluorescence in the red spectral window is advantageous. The alkyne functionality enables downstream attachment to azide-bearing biomolecules, linkers, or surfaces to build fluorescent probes, labeled targeting constructs, and microscopy-ready conjugates.

1. Biomolecule Labeling

Cyanine7 alkyne is used by chemical biology and imaging groups to fluorescently tag proteins, peptides, and other azide-functional biomolecules via click conjugation workflows. Researchers typically employ the resulting Cyanine7-labeled conjugates for tracking binding interactions, monitoring biomolecule uptake or distribution in experimental systems, and generating fluorescent standards for assay development. The far-red emission profile helps reduce interference from common autofluorescence sources when imaging or measuring fluorescence in complex biological backgrounds.

2. Fluorescence Microscopy Tracing

Cyanine7 alkyne supports fluorescence microscopy experiments where far-red labeling improves visualization of labeled targets against cellular and tissue autofluorescence. In practice, the dye is incorporated into fluorescent conjugates that can be introduced as imaging reagents for localization studies, co-localization experiments with spectrally distinct markers, and time-course tracking of labeled biomolecules in microscopy workflows. The alkyne handle is particularly useful when researchers need a modular dye component that can be attached to different azide-bearing targeting moieties or sample-specific labeling reagents.

3. Fluorescent Probe Construction

Cyanine7 alkyne is frequently selected for building modular fluorescent probes and reagent libraries, especially when the probe design requires a reliable attachment point for azide-containing recognition elements. Teams developing molecular imaging tools use the dye to generate conjugates that retain the alkyne-to-azide click connection as a late-stage labeling step, enabling rapid swapping of targeting ligands, linkers, or surface anchors. This approach is also used in biomaterials research to prepare fluorescently functionalized constructs for imaging-guided studies of material-biomolecule interactions and surface-associated labeling.

4. Surface And Material Functionalization

Cyanine7 alkyne is applied in materials chemistry and biomaterials workflows to introduce far-red fluorescence onto azide-functional surfaces, coatings, or scaffold materials. Researchers use the dye-conjugated surfaces as imaging reagents to visualize adsorption, immobilized biomolecule distribution, and spatial patterning on engineered substrates. The click-compatible alkyne functionality helps streamline the preparation of fluorescently labeled materials for microscopy-based readouts and fluorescence mapping in experimental materials characterization.