title: Silicon Spiro Double Helicene-like Compounds Based on Dithieno[2,3-b:3',2'-d]thiophene: Syntheses and Crystal Structures.
abstract: Silicon spiro carbon-sulfur double helicene-like compounds 1 and rac-2 were synthesized from 2,5-bis-trimethylsilanyldithieno[2,3-b:3',2'-d]thiophene, with total yields of 17% and 7%, respectively. (1)H and (13)C NMR spectra and X-ray crystallographic analysis showed the predicted 4-fold symmetry for 1 and rac-2 and confirmed their spiro double helicene-like spatial configurations. The absorption behavior of compounds 1 and rac-2 was also investigated.
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Chunli
authors.initials: C
authors.lastname: Li
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Longlong
authors.initials: L
authors.lastname: Wu
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Wan
authors.initials: W
authors.lastname: Xu
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Jinsheng
authors.initials: J
authors.lastname: Song
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Jianwu
authors.initials: J
authors.lastname: Shi
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Panpan
authors.initials: P
authors.lastname: Yu
authors.affiliation: Jiangsu Province Key Laboratory for Chemistry of Low Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University , Huaian, 223300, China.
authors.forename: Yuhe
authors.initials: Y
authors.lastname: Kan
authors.affiliation: Engineering Research Center for Nanomaterials, Henan University , Kaifeng, 475004, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Wang