Synthesis And Optical Properties Of Ion-pair Charge Transfer Compounds Based On Viologen

Studies have shown that:the alkaline earth metals,transition metals and heavy main group metal-organic coordination polymers have excellent performance in the optical(magnetic)science,electrochemistry,gas adsorption and storage and other fields.Viologen derivatives are parts of the unit structure containing two N atoms,which can accept electrons and can provide electrons,has a good reversible redox properties,it supramolecular different metal organic framework polyanion forming inorganic component,its colorful structure,capable of both organic and inorganic advantages of the two parts,resulting in an unexpected synergistic enhancement function.Based on viologen construct ion of charge transfer compound,there are two categories,one is viologen/metal halide hybrid molecule,and the other is the use of viologen doped to a pluralistic aromatic carboxylic acid with a metal center constructed polyanion MOFs.Under hydrothermal conditions or solvothermal,we have got three viologen/metal halide hybrid polymers and 9 viologen/single-ring acid-metal coordination polymers,two viologen/naphthalene dicarboxylic acid metal cluster compounds.Compound 2 is methyl viologen with two different structures of clusters consisting of cadmium iodide,which is known as the only one example of Cd-I hybrid system.For thestudy of metal clusters iodide provides a more diversified content.Compound 3 is polyanionic compound having the structure of associative 3-D Pb-Br with methyl viologen formed,which viologen clip in the hole,which is viologen-metal halide hybrid materials only one example.Multidimensional polyanion compound frame are made of viologen and polycarboxylic aromatic carboxylic acid with a different composition and structure of main group or transition metal composition consisting of 4-14 ion-pair charge-transfer compound.Viologen interspersed polycarboxylic aromatic acid-polyanion MOFs made of metal,they rely on the role of electrostatic attraction or secondary keys and together.Such compounds been reported rarely.Therefore,the research of this thesis viologen ion-pair charge transfer compounds have a very important reference value from the breadth and depth of it.In this paper,the use of X-ray diffraction method to determine the crystal structure of the 14 compounds,and its IR,UV-tested and characterized visible diffuse reflectance and fluorescence properties.But also on the part of the thermochromic compound,light current test.Results of this study may provide valuable guidance for the design and synthesis of new viologen-based organic metal complex polymer.