Spectroscopic investigations of Zn(4-Cl-PhS)2(dmphen) (4-Cl-PhS=anion
of 4-chlorobenzenethiol; dampen=2,9-dimethyl- 1, 10-phenanthroline) in
the p2(1)/N and p2(1)/C crystal phases and in polymethylmethacrylate
(PMMA) are reported. The results demonstrate the existence of an intra
molecular barrier to energy migration between 3pipi and ligand-to-lig
and charge-transfer levels.