Invitrogen - Molecular Probes

Data for P31

372.51

DMF, DMSO

Abs

341

43,000

377

MeOH

<1>	Alkylpyrene fluorescence lifetimes are up to 110 nanoseconds and are very sensitive to oxygen.
<2>	Pyrene derivatives exhibit structured spectra. The absorption maximum is usually about 340 nm with a subsidiary peak at about 325 nm. There are also strong absorption peaks below 300 nm. The emission maximum is usually about 376 nm with a subsidiary peak at 396 nm. Excimer emission at about 470 nm may be observed at high concentrations.