Following a current trend of chemical research, photochemical investig
ations are moving from molecular to supramolecular species. Some of th
e results obtained by the authors with supramolecular species containi
ng metal complexes are briefly reviewed, with particular emphasis on (
i) cage-type complexes, (ii) host-guest systems, (iii) metal catenates
, and (iv) oligonuclear metal complexes.