标题：C-H center dot center dot center dot pi Interaction-Modulated Solid-State Packing and Carrier Mobility in Thienyl and Thieno[3,2-b]Thienyl End-Capped Distyrylarylene Derivatives
作者：Li, Ye-Xin; Liang, Zuo-Qin; Xi, He; Ma, Lu-Lu; He, Tao; Yuan, Chun-Xue; Tao, Xu-Tang
作者机构：[Li, Ye-Xin; Liang, Zuo-Qin; Xi, He; Ma, Lu-Lu; He, Tao; Yuan, Chun-Xue; Tao, Xu-Tang] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples 更多
通讯作者地址：[Tao, XT]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
关键词：C-H center dot center dot center dot pi interactions; distyrylarylenes;; semiconductors; solid-state structures; X-ray diffraction
摘要：Research on structure-property relationships in distyrylarylene derivatives is far behind their wide applications in optoelectronic devices due to the absence of crystal structure information. Herein, the single crystals of 4,4'-bis(2-thienylvinyl)biphenyl (1) and 4,4'-bis(2-thieno[3,2-b]thienylvinyl)biphenyl (2) were successfully grown by the vapor transport method. Both molecules adopt the typical herringbone packing motif. However, the intermolecular C-H center dot center dot center dot pi interaction in compound 2 is much stronger than that in compound 1. The correlations of interchain interaction with film morphology, optical and electronic properties were studied. Compound 2 formed higher crystalline films with (001) and (111) orientations. The organic field-effect transistor properties of both materials were investigated. Compound 2 showed better performance with a hole mobility higher than 0.01 cm(2)V(-1)s(-1) and an on/off current ratio over 10(6). These results reveal that the intensity of C-H center dot center dot center dot pi interactions can exert dramatic influences on the optical and electronic properties of distyrylarylene-based materials.