Identify the correct statement(s):
(i) Luminescent complexes radiate energy after electronic excitation by the absorption of radiation.
(ii) Phosphorescence takes place without change in multiplicity between excited and ground state.
(iii) Luminescence competes with other non-radiative decays.
A) (i) and (iii)
B) All are correct
C) (ii) and (iii)

Question

Quizplus · Accepted Answer

(i) is correct because luminescent complexes indeed emit light after being electronically excited by absorbing radiation. (iii) is also correct because luminescence does compete with non-radiative decay processes such as internal conversion and intersystem crossing. (ii) is incorrect because phosphorescence involves a change in multiplicity between the excited state and the ground state, typically from a triplet excited state to a singlet ground state.

Identify the Correct Statement(s)