Synthesis, Crystal Structure, Spectroscopic Property and Redox Behavior of Zinc(Ⅱ) Complexes Contain

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Two novel mono-nuclear zinc(Ⅱ)complexes with oligoaniline-functionalized terpyridine ligands have been synthesized and verified by 1H-NMR,13C-NMR,Elemental Analysis (EA)and X-ray Diffraction(XRD).The UV-vis spectra show the ligand-centered(LC)π-π*transitions and intra-ligand charge transfer(1ILCT)transitions,and the 1ILCT hand red-shifts with the increasing number of aromatic amine groups in the ligands.Complex[Zn(L1)2](PF6)2 with an aromatic amine group in ligand shows a strong emission peak at 523 nm in the MeCN solution at 293 K and a blue-shifted band at 517 nm in the alcoholic glass at 77 K.However,for complex [Zn(L2)2](PF6)2 containing aniline dimer modified ligand,no apparent emission can be observed in the MeCN solution at room temperature due to a PET non-radiative decay pathway.Both of them show multiplicate redox processes based on oligoaniline and terpyridine units.The shifts of redox potentials also reflect the D-A interactions between the oligoaniline units and[Zn(TPY)2]2+ core.
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