Although molecular orbital (MO) calculations give a rational understanding of the photoluminescence mechanism and have been applied to investigation
on the mononuclear or multinuclear complexes, such as AlQ3
(HQ = quinolin-8-ol) and its derivatives[22] as well as a series
of coinage d10 metal complexes,[23] analogous applications
on the luminescence studies of Zn(ii) or Cd(ii) complexes
were scarce[4,9,10] while those on the polymeric complexes
were much more sporadic.[9]