Lifetimes in solution

sample:                                          lifetime (nanoseconds)

Pyrene butyric acid in DMSO
                air equilibrated                 90 
                deoxygenated                     117
Benzo[ghi]perylene in DMSO
                air equilibrated                 60
                deoxygenated                     90
Benzo[ghi]perylene in 0.3 mM POPC in PBS
                air equilibrated                 83
                deoxygenated                     105