quantumyield
Quantum yield, often denoted by Φ, is a dimensionless measure of the efficiency with which a photophysical or photochemical event proceeds per photon absorbed. In general, it is defined as the number of events of interest divided by the number of photons absorbed.
There are several contexts for quantum yield. For fluorescence, the fluorescence quantum yield ΦF is the fraction
Calculation can be expressed in terms of excited-state decay pathways. For a molecule in the excited state,
Measurement of quantum yields typically involves actinometry to determine the photon flux and, when possible, an