Synthesis and Characterization of organic field effect transistor materials containing thieno[3,2-b]thiophene units

• Main Authors: Yu-Da Cheng, 程昱達
• Other Authors: Y. S. Hon
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/80279917860161477743

碩士 === 國立中正大學 === 化學所 === 94 === New series of compounds based on thieno[3,2-b]thiophene (Th) have been synthesized for OFET (organic field effect transistor) application. Electron deficient heteroaromatic rings such as pyridine, pyrimidine, and oxadiazole were incorporated into the Th core to facilitate intermolecular π-π interaction (effective distance < 3.8 Å) and provide electron-hopping pathways. In some saturated compounds trifluoromethyl group was also incorporated in order to convert electron-excessive Th segment to a n-type molecule. AFM and X-ray diffraction were used to characterize the stacking of molecule in the film after vacuum deposition. X-ray structural analysis for Th-SN was carried out： Monoclinic Z1/n; a = 13.686 Å; b = 6.034 Å; c = 14.153 Å, ?= 90o ; β = 104.255o; γ = 90o 。 The molecules were found to adopt a herringbone packing with the distance of π-π interaction at 3.643 Å.