Principles of Fluorescence Spectroscopy

PRINCIPLES OF FLUORESCENCE SPECTROSCOPY 887
Table II.4. Single-Exponential Lifetime Standards
Sample a λ em (nm) τ (ns a )
Anthracene 380 5.47
PPO 400 1.60
POPOP 400 1.38
9-cyanoathracene 440 14.76
aAll samples in ethanol. The lifetimes were measured by time-correlated
single-photon counting. From [14]. The paper is unclear on purging,
but the values seem consistent with digassed samples.
Table II.5. Single-Exponential Standards a
Fluorophore τ (ns)
POPOP in cyclohexane 1.14 ± 0.01
POPOP in EtOH 1.32 ± 0.01
POPOP in aq EtOH 0.87 ± 0.01
Anthracene in EtOH 4.21 ± 0.02
9-Cyanoanthracene in EtOH 11.85 ± 0.03
a All measurements were at 25°C, in equilibrium with
air, by time-correlated single photon counting. From
[17].