Nw. Alcock et al., Red and blue luminescent metallo-supramolecular coordination polymers assembled through pi-pi interactions, J CHEM S DA, 9, 2000, pp. 1447-1461
Citations number
80
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
The use of pi-stacking interactions to control the aggregation of photo-act
ive metal centres is explored through the design of bis(2,2';6',2 "-terpyri
dyl) metal complexes functionalised with biphenyl 'tails'. Aryl-aryl intera
ctions control the aggregation of the metal complexes into polymetallic arr
ays in the solid state. Cobalt(II), ruthenium(II), nickel(II), copper(II),
zinc(II) and cadmium(II) bis-ligand complexes and a mixed ligand ruthenium(
II) complex have been structurally characterised. The solid-state structure
s are dependent on which units dominate the pi-stacking. For cobalt, ruthen
ium, nickel and copper, biphenylene-biphenylene interactions lead to linear
rod-like arrays, while for the group 12 d(10) ions zinc and cadmium, biphe
nylene-pyridyl interactions lead to two-dimensional sheets. The addition of
the biphenylene tail has favourable effects on the photophysical-propertie
s of the complexes which exhibit room temperature red (ruthenium) or blue (
zinc and cadmium) luminescence, both in solution and the solid state.