The Luminesence of Chlorophyll in Spinach Chloroplasts Induced by Acid-Base Transition
B.C.Mayne R.K.Clayton
Charles F. Kettering Research Laboratory
Jan 10 1966
The occurrence of a delayed light emission in photosynthetic organisms was first reported by Strehler and Arnold. This emission was shown to have the same spectrum as that of the fluorescence of chlorophyll in vivo, but a much greater lifetime. It therefore reflects the restoration of singlet excited states in chlorophyll at the expense of metastable energy.
Everything is simple, if you don't understand it.