Synthesis And Properties Of Di(2-thiophenyl)Compounds Bridged With Imidazole Or Thiophene

In recent years, the study of molecular electronic devices has drawn greater attention due to the rapid development of computer technology. At present, it has been synthesized and measured a variety of molecular electronic devices such as molecular switches, molecular storages, molecular wires and molecular rectifier. Molecular switch can be used for the structural units of the future logic and memory circuit which give rise to the wide research. The dithienylethene unit was considered the most potential molecular switch due to its outstanding advantages of good thermal stability, fatigue resistance and rapid response. The study of molecular wires is also in-depth because that they are the bridge which connect molecular devices and external devices in the transmission of electronic and transporting information. Metal-organic molecular wires containning transitional-metal have caused the most attention for their good ability of electron transfer, highly stability and easy to be modificated So, it is important to design a series of new molecular switches and wires with good performance. The main content of this paper is that we introduced the imidazole and metal into the diarylethene unit to examine the function of molecular switches and molecular wires. Details are as follows:1. A series of conjugated compounds of dithienylethene compound with imidazole as the bridge unit have been designed and synthesized, and their photochromism and the function of ion-identification have been examed by UV/vis absorption spectra and fluorescence emission spectra The results show that such imidazole-bridged di(2-thiophenyl) compounds have good photochromic properties and high selectivity toward Fe3+ion, which provide a new approach to design the Fe3+ion selective sensors.2. A series of binuclear and trinuclear ruthenium compounds with thiophene or benzothiophene as the bridge unit have been designed and synthesized, and electrochemical method test has been used to study their ability of electron-transfer. The results show that the electron can pass through in the bimetallic system, while there are two electronic channels exist in the trimetallic system, amid which electron will be better passed by molecular line from Ru1to Ru?.