Synthesis And Properties Of Conjugate Sulfur-Rich Compounds With Amide Groups

Tetrathiafulvalene (TTF) and its derivatives, being used as organic conductor, molecular sensor, or switch, have stimulated great interest for a long time, due to their unique donor and redox properties. The amide groups can form rich hydrogen–bonds, which makes them have good application in molecular assembling and responding. Although some crystal structures of TTF–amide derivatives have been reported, their properties need to be further explored. In this thesis, we pay attention to the study on a kind of new bifunctional TTF derivative with dioxotetraamine. The major contents we researched were as follows:In introduction, the properties and important achievements of TTF derivatives are reviewed briefly. Recent researches on TTF–amide and dioxotetraamine (diamino–diimido) ligands are summarized. Especially, the new researches on molecular recognition of these compounds are described.In chapter 2, DMT–TTF–(CONHCH2CH2NH2)2 (L) and the complexes of L with Cu(II) were synthesized. The crystal structures of the complexes were determined by single crystal X–ray diffraction. Equilibriums of proton transition and metal coordination for this ligand have been studied by means of pH titration and electrochemistry. The responses of pH and metal ion coordination to the redox state of the ligand are also discussed.In chapter 3, supramolecular compounds of protonated H2L2+ with some anions were synthesized. Crystal structure analysis showed that there are lots of hydrogen bonds in the structures of these complexes. Redox recognitions of H2L2+ to anions and cations were investigated by CV method. The results indicate that the stronger the hydrogen bonds between anions and–CONH groups are, the larger the responses are in CV shift.