Preparation and characterisation of some nickel(II) tetra-aza macrocyclic complexes bearing pendant polymerisable groups as part of the ligand superstructure
作者:James H. Cameron、Stephen Graham
DOI:10.1039/dt9890001599
日期:——
The synthesis and characterisation of some new nickel(II) macrocyclic complexes of the ‘lacunar’ type have been performed where the ligand has, as part of the ligand superstructure, either 4-vinylphenyl or allyl groups capable of undergoing polymerisation reactions with selected comonomers. The n.m.r. spectra of a number of these new complexes show them to be fluxional on the n.m.r. time-scale and
Intermolecular interactions between new bismacrocyclic donors and a series of accepters (such as quinone, TCNQ, or toluene) have been studied by crystallography in the solid state and by voltammetry in solution. The bismacrocyclic molecules functioning as receptors contain well-defined flexible cavities which accommodate molecules of appropriate size and can adjust to the guest molecules. This brings together transition metal ions and organic substrates within the same supramolecular structure. The host-guest interactions decrease the energy gap between the HOMO of the donor species and the LUMO of accepters, thus leading to the observed nonadditive CT properties.