一系列环状oligothienoacenes(的1,3,和4)已经通过从四[3,4亚噻吩基](阶梯状的环化合成策略被成功地合成2)。单晶X射线衍射分析与理论计算相结合,阐明了分子构型从2的鞍形转变为准鞍形(3b,3c),再转变为准螺旋形(4b),最后到准平面形状(1,图3a,图4a)。有机场效应晶体管基于(OFET中)1,图3a,并制作了4a。的7.5×10的场效应迁移率-4,2.6×10 -3,和6.8×10 -4厘米2 V -1小号-1是为获得1,图3a和4a中,分别。化合物3a和4a可以用作空气稳定的p型有机半导体,而化合物1对空气敏感。
一系列环状oligothienoacenes(的1,3,和4)已经通过从四[3,4亚噻吩基](阶梯状的环化合成策略被成功地合成2)。单晶X射线衍射分析与理论计算相结合,阐明了分子构型从2的鞍形转变为准鞍形(3b,3c),再转变为准螺旋形(4b),最后到准平面形状(1,图3a,图4a)。有机场效应晶体管基于(OFET中)1,图3a,并制作了4a。的7.5×10的场效应迁移率-4,2.6×10 -3,和6.8×10 -4厘米2 V -1小号-1是为获得1,图3a和4a中,分别。化合物3a和4a可以用作空气稳定的p型有机半导体,而化合物1对空气敏感。
Intramolecular Cyclization of Thiophene-Based [7]Helicenes to Quasi-[8]Circulenes
作者:Andrzej Rajca、Makoto Miyasaka、Shuzhang Xiao、Przemysław J. Boratyński、Maren Pink、Suchada Rajca
DOI:10.1021/jo902030u
日期:2009.12.4
Intramolecular cyclization in a series of thiophene-based dibromo[7]helicenes (4-6) with different helix Structures is investigated by vacuum pyrolysis, tin- and palladium-mediated C-C bond forming reactions. The product With the cyclic structure of the annelated aromatic rings, which resembles [S]circulene devoid of an atom linkage, is referred to as quasi-[8]circulene. Vacuum pyrolysis of 4 gives insoluble, unidentified products, while 5 and 6 yield the corresponding quasi-[8]circulenes Under similar conditions. Thermogravimetry (TG) and differential scanning calorimetry (DSC) analyses for 4 indicate complex reaction pathways, while those for 5 and 6 show a single process corresponding to a loss of 1 equiv of Br-2 at about 330 degrees C. Pd-mediated reductive cyclization provides quasi-[8]circulenes for all three [7]helicenes, though only 4 gives a good isolated yield. Tributyltin hydride-mediated radical cyclization of 4-6 provides quasi-[8]circulenes In excellent yields, and it is practically insensitive to the helix Structure. Experimental and calculated UV-vis absorption spectra for quasi-[8]circulenes and [8]circulenes are reported. The results suggest that the lack of atom linkage in quasi-[8]circulene does not significantly affect properties and conformation, compared to those for the corresponding [8]circulenes.
From Saddle-Shaped to Planar Cyclic Oligothienoacenes: Stepped-Cyclization and Their Applications in OFETs
作者:Lu Li、Shuai Zhao、Bingbing Li、Li Xu、Chunli Li、Jianwu Shi、Hua Wang
DOI:10.1021/acs.orglett.8b00482
日期:2018.4.20
4-thienylene] (2). Single-crystal X-ray diffraction analysis combined with theoretical calculations elucidated that the molecular configuration transforms from the saddle shape of 2 to the quasi-saddle shape (3b, 3c), then to the quasi-helical shape (4b), and at last to the quasi-plane shape (1, 3a, 4a). Organic field-effecttransistors (OFETs) based on 1, 3a, and 4a were fabricated. The field-effect mobilities
一系列环状oligothienoacenes(的1,3,和4)已经通过从四[3,4亚噻吩基](阶梯状的环化合成策略被成功地合成2)。单晶X射线衍射分析与理论计算相结合,阐明了分子构型从2的鞍形转变为准鞍形(3b,3c),再转变为准螺旋形(4b),最后到准平面形状(1,图3a,图4a)。有机场效应晶体管基于(OFET中)1,图3a,并制作了4a。的7.5×10的场效应迁移率-4,2.6×10 -3,和6.8×10 -4厘米2 V -1小号-1是为获得1,图3a和4a中,分别。化合物3a和4a可以用作空气稳定的p型有机半导体,而化合物1对空气敏感。