Polybipyridine ligands derived from acyclic and macrocyclic polyamines; synthesis and metal binding studies
作者:Jean-Marie Lehn、Raymond Ziessel
DOI:10.1039/c39870001292
日期:——
A novel series of ligand bearing three to six pendant 2,2′-bipyridine groups attached to acyclic (tripode, tetrapode) and macrocyclic (cyclam, hexacyclen) polyamines has been synthesized and shown to form metal complexes, in particular of polynuclear type.
The Eu3+ complexes of the tripode and tetrapode ligands 1 and 2, respectively, containing2,2′-bipyridine coordinating units have been prepared. The UV absorption and luminescence spectra, lifetimes, and quantum yields have been measured under a variety of experimental conditions. The contributions of different paths to the decay of the luminescent excited state are evaluated, and the structures of