The Et Classes Are Group Conducting Molecular Crystals And Related Anion Projects

In the last 40 years, scientists have been actively engaged in developing high temperature superconductors. Extensive works have been carried out in the design of organic conductors of charge-transfer complexes based on planar π-molecules, which can be donors or acceptors or both. Mostly obtained organic conductors and superconductor structures are based on BEDT-TTF ( Bis(ethylenedithio)tetrathiafulvalene, abbreviated as ET).BEDT-TTFThis article mainly deals with crystal growth of ET-based molecular conductors and relative anions. There are 16 new kinds of crystals being obtained and their structure have been determined by X-ray method. Five kinds of ET-based molecular conductors have been synthesized and their crystal structures and properties have been systematically studied. As our contribution to explore ET-based molecular conductor on anion engineering, we first introduce the croconate anions as counterions. The structure chemistry of the croconate has been systematically studied. The important contents and conclusion are as following:The first section: ET-based molecular conductors with various balance anions have been electrocrystallized and their crystal structures have been determined. Crystal growth, crystal structures, conducting properties and the structure-property relationships between those compounds are systematically studies.1. Five new kinds of ET-based molecular conductors with various balance anions have been electrocrystallized and their structures have been determined by X-ray method. In our research, we found that there are three intrinsic factors that determine the crystal quality, (i) High symmetry anions are easily to form single crystal of high quality among molecular conductors, (ii) Mass transfer in the electrolyte has great effect on the structure and the quality of the obtained crystal, (iii) Generally, molecular conductor based on BEDT-TTF is often grown in the direction of high conductivity. So high conductivity molecular conductor is easily to get high quality single crystal. And we also determined the oxidative state of BEDT-TTF in the obtained molecular conductors through bond lengths analysis and Raman spectra.