title: Fused-ring pyrazine derivatives for n-type field-effect transistors.
abstract: Three new fused-ring pyrazine derivatives end-functionalized with trifluoromethylphenyl groups have been synthesized. The effect of a fused-ring pyrazine core on the thermal, electronic, optical, thin film morphology, and organic field-effect transistor (OFET) properties was investigated both experimentally and theoretically. Electrochemistry measurements and density functional theory calculations suggest that the pyrazine core plays a significant role in tuning the electron affinities of these compounds. The optical absorption and fluorescence properties are also sensitive to the pyrazine core. The OFET devices based on the fused-ring pyrazine compounds exhibit electron mobilities as high as ca. 0.03 cm(2) V(-1) s(-1) under nitrogen, and their performance is sensitive to the pyrazine core. The larger pyrazine core leads to a lower LUMO level and lower reorganization energy, to more ordered thin film morphology with larger grain size, and finally to higher mobilities.
authors.affiliation: Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Wang
authors.forename: Yugeng
authors.initials: Y
authors.lastname: Wen
authors.forename: Xiaodi
authors.initials: X
authors.lastname: Yang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Weiyi
authors.initials: W
authors.lastname: Zhou
authors.forename: Shiming
authors.initials: S
authors.lastname: Zhang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Zhan
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Shuai
authors.forename: Daoben
authors.initials: D
authors.lastname: Zhu