A straightforward strategy has been used to construct large BN-embedded π-systems simply from azaacenes. BN heterosuperbenzene derivatives, the largest BN heteroaromatics to date, have been synthesized in three steps. The molecules exhibit curved π-surfaces, showing two different conformations which are self-organized into a sandwich structure and further packed into a π-stacking column. The assembled
Regulation of the backbone structure and optoelectrical properties of bis-pyridal[2,1,3]thiadiazole-based ambipolar semiconducting polymers <i>via</i> a fluorination strategy
作者:Xin Tao、Yanwei Liu、Lulu Du、Yongkun Yan、Zeng Wu、Yan Zhao、Yunlong Guo、Huajie Chen、Yunqi Liu
DOI:10.1039/d1tc03876a
日期:——
A facile fluorination strategy is used to build a coplanar, π-extended bis-pyridal[2,1,3]thiadiazole-containing ambipolar polymer, which exhibits improved ambipolar mobilities compared with its analogue without fluorine substituents.
DPY and DPE alkylenesulfanyl-bridged bithienyls were prepared by a highly effective ring-closing reaction via arylalkylsulfonium intermediate and used as inner cores in oligothiophenes. HOMO-LUMO energy levels, conformational flexibility, and intrinsic asymmetry of the cores are reflected in the electronic, film-forming, and thermal properties of the corresponding oligomers.
Saddle Shaped Hexaaryl[<i>a,c,fg,j,l,op</i>]tetracenes from 4,5,9,10-Tetrafunctionalized Pyrenes
A new K-region functionalized pyrene is presented which was used as a building block for the straightforward synthesis of hexaaryl[a,c,fg,j,l, op]tetracene via fourfold Stille coupling and subsequent cyclodehydrogenation. Electronic properties and crystal structures are provided and reveal a saddle conformation for the curved hexaarylated tetracenes.(1)