An Amphiphilic Lutetium Bisphthalocyanine: Lu[(PEO)₄Pc][(DodO)₄Pc]

Abstract

The synthesis of an amphiphilic lutetium bisphthalocyanine is described. One phthalocyanine of the sandwich complex bears four hydrophobic chains (C12H25O = DodO), and the other bears four hydrophilic polyether groups (CH3(OCH2CH2)nO = PEO). The molecule has been characterized by 1H NMR and ESI mass spectrometry. The mean value for n, the number of polyethyleneoxy units in the starting PEOH, is 8 with a Gaussian distribution around that value; however, for the most abundant lutetium bisphthalocyanine, 4n = 26. On the spectrum, the peak corresponding to the adduct with two Na+ is higher than the one of the singly charged ion, a result of the affinity of polyethers for alkali ions.