TRANSIENT EFFECTS CAN CHANGE IDENTIFIABILITY CRITERIA FOR COMPLEX EXCITED-STATE PROCESSES

The identifiability of two-state excited-state processes is studied wh en transient effects are present. When the emission bands of the excit ed species are well separated, the deactivation rate constants of the two excited species to their respective ground states, k(01) and k(02) , can be determined from two decay traces of the individual excited sp ecies at one concentration. Thus, two decay traces are sufficient for the recovery of k(01) and k(02) for inter- and intra-molecular two-sta te excited-state processes. When transient effects are absent more kin etic information is needed for the recovery of k(01) and k(02). (C) 19 97 Published by Elsevier Science B.V.