Synthesis, Crystal Structures, Optical Properties, and Photocurrent Response of Heteroacene Derivatives
作者:Tiejun Ren、Jinchong Xiao、Wenying Wang、Wenya Xu、Sujuan Wang、Xuemin Zhang、Xuefei Wang、Hua Chen、Jianwen Zhao、Li Jiang
DOI:10.1002/asia.201402247
日期:2014.7
Six 5,9,14,18‐tetrathiaheptacene derivatives (1 a–1 f) were synthesized by using a simple ether–ether exchange reaction and fully characterized. In contrast to the planar conformation usually observed in thiophene‐fused benzene systems, single‐crystal analysis indicates that 7,16‐dipropyl‐5,9,14,18‐tetrathiaheptacene (1 a), 7,16‐diphenyl‐5,9,14,18‐tetrathiaheptacene (1 b), and 7,16‐di(4′‐chlorophenyl)‐5
通过简单的醚-醚交换反应合成了六种5,9,14,18-四硫杂庚烯衍生物(1 a – 1 f),并进行了充分表征。与通常在噻吩-熔融苯系统中观察到的平面构象相反,单晶分析表明7,16-二丙基-5,9,14,18-四噻庚烯(1 a),7,16-二苯基-5,9 ,14,18-四硫庚烯(1b)和7,16-di(4'-氯苯基)-5,9,14,18-四硫庚烯(1 c)采用椅子构象。1 a,1 b和1 c时,蒽与末端苯单元之间形成的二面角为137.258、137.855和134.912°分别接近理论优化结果(1 b时为128° )。有趣的是,7,16-二(三氟甲基苯基)-5,9,14,18-四硫杂庚烯(1 e)的氧化产物呈鞍形,这导致在单晶中形成圆柱状单元。苯基侧基上的取代基对其UV / Vis吸收光谱的影响较小,但可以在发射光谱中观察到明显的红移,这是分子内电荷转移的原因。电化学测量表明,所有化合物均出现两个氧化波。基于1