Luminescence Spectroscopy (Chapter 15) fluorescence,phosphorescence,chemiluminescence all follow electronic excitation Excited Electronic States: Each electron has unique set of quantum numbers (Pauli Exclusion Principle) n principal (1s,3p. 1 angular momentum (1=0=s,1=1=p.) s spin m magnetic Any two electrons in same orbital(n,1,m)must have different spins S=Zsil Multiplicity:2S+1 (either 1,2,3.) CEM 333 page 5.1 Luminescence Spectroscopy (Chapter 15) fluorescence, phosphorescence, chemiluminescence all follow electronic excitation Excited Electronic States: Each electron has unique set of quantum numbers (Pauli Exclusion Principle) n principal (1s, 3p. ) l angular momentum (l=0=s, l=1=p. ) s spin m magnetic Any two electrons in same orbital (n, l, m) must have different spins s = + 1 2 or - 1 2 S = s å i Multiplicity: 2S+1 (either 1, 2, 3. ) CEM 333 page 5.1