Synthesis And Properties Of Pyridyl-Substituted TTF Derivatives

Tetrathiafulvalene (TTF) and its derivatives have stimulated great interest for a longtime, due to their unique donor and redox properties. They have been used as photoelectricswitch, molecular sensors and electrode materials. Polypyridyl metal complexes are alsowidely studied since they may find applications as molecule-level wires, non-linear opticaland molecular sensing materials, etc. The integration of a TTF core with pyridyl-basedligands, being capable of coordination to a metallic centre, offers a new perspective on thestructural architecture and modulation of electronic properties of molecular solids. In thisthesis, some new TTF-Py derivatives and their metal complexes are synthesized; theirsolid-state chemistry has also been studied. The major contents are as follows:1、In introduction, the properties and important achievements of TTF derivatives arereviewed briefly. Recent researches on TTF–Py compounds are also summarized.2、We studied the structures and the properties of L1(DMT-TTF-(CONHCH2Py)2) andits complexes with Cu, Mn, Ni. Spectroscopic and electrochemical properties of thesecomplexes indicate that they are electrochemically active materials. The differentmorphologies of the films prepared from the coordination compounds reflect thedimensions in their molecular structures. The effect of metal coordination centers onphotocurrent response behavior is examined. The redox-active metal coordination centersshould play an important role in improvement of the photocurrent response property.3、Five metal complexes of L2(Py-TTF-Py) were synthesized for research. Thestructures of these complexes were characterized by single crystal X-ray analysis. Theirsolid-state electrochemical properties and photocurrent response behavior are studied. Theresult indicates that they are electrochemically active materials in the presence of MV electron acceptor.We chose two kinds of TTF-Py as the precursors, prepared their metal complexes,characterized their crystal structures, and explored their redox and photocurrent responseproperty. This work is valuable in helping to design and explore new photoelectrode activeinorganic-organic hybrid molecular systems.