Phenylethynylpyrene (PEP) fluorophore is a polyaromatic hydrocarbon label with high sensitivity to microenvironment. Similarly to pyrene, PEP dye readily forms excimers. However, PEP fluorescence is more red-shifted
PEP can be used as microenvironment probe, and as a label for assays based on excimer formation.
This reagent contains triethyleneglycol linker to facilitate dissolution of non-polar PEP dye in organo-aqueous labeling reaction mixtures. With this azide, and Click Chemistry, it is easy to turn any molecule bearing alkyne into PEP-labeled probe.
General properties
| Appearance: | off white / yellowish solid | 
| Molecular weight: | 544.64 | 
| Molecular formula: | C34H32N4O3 | 
| Solubility: | soluble in dichloromethane, chloroform, moderately soluble in DMSO, DMF, acetonitrile | 
| Quality control: | NMR 1H (95%) | 
| Storage conditions: | Storage: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. | 
  Spectral properties
| Excitation maximum, nm: | 293; 362; 384 | 
| Emission maximum, nm: | 389 |