Functionalization Of Nickel Compounds Of Pyridyl Dithiolene

As famous classical redox active molecules, metal bis-dithiolene complexes have been paid much attention by scientists. A series of dithiolene complexes were synthesized and their chemical and physical properties were studied. Recently, research on metal complexes with 1,2-dithiolene ligands has recrudesced due to their increasing potential in energy conversion, nonlinear optics, bioinorganic chemistry and catalysis chemistry.Although various structures, properties and potential applications of transition metal dithiolene complexes have been investigated, studies on photocurrent response property of the dithiolene materials are limited. In this work, a new nickel dithiolene derivative(4-pedt) that directly conjugated with pyridine group has been synthesized. We use this nickel dithiolene complex as the film material to prepare photoactive electrodes for photoelectro-chemical studies. The major works are as follows:1. In introduction, the varieties and characters of metal dithiolene derivatives are reviewed briefly. Then, the important achievements and properties of metal dithiolene derivatives are summarized. Finally, the significance of this research subject is summarized.2. We use nickel dithiolene complex [n-Bu4N][Ni(4-pedt)2] as the film material to prepare photoactive electrodes for photoelectro-chemical studies. Taking advantage of the pyridyl group of the complex that can act both as a proton acceptor and a coordination ligand, photocurrent responses of the film to different acidity mediums and transition metal ions are investigated and discussed. By cation exchange reaction, a new MV[Ni(4-pedt)2]2 compound is synthesized. The photocurrent efficiency of the dithiolene compound can be improved by increasing its electron transfer properties.3. A series of nickel dithiolene complexes with alkylated pyridyl groups,[Ni(4-pedt)-Cn H2n+1)2]X2(X = Br, I), are synthesized and characterized. Their redox and coordination behaviors were studied. Their films are characterized by SEM and spectral analysis. Also, photocurrent responses of the films with different alkyl chains are investigated. By cation exchange reaction, a new [Ni(4-pedt)-Cn H2n+1)2][Ni(4-pedt)2]compound was synthesized and photocurrent efficiency of the dithiolene compound is improved by using the dithiolene anion.