Browsing by Author "Wu, Guanzhao (TTU)"
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Item Enantioselective assembly of multi-layer 3D chirality(2020) Wu, Guanzhao (TTU); Liu, Yangxue (TTU); Yang, Zhen; Jiang, Tao; Katakam, Nandakumar (TTU); Rouh, Hossein (TTU); Ma, Liulei (TTU); Tang, Yao (TTU); Ahmed, Sultan (TTU); Rahman, Anis U.; Huang, Hongen; Unruh, Daniel (TTU); Li, Guigen (TTU)The first enantioselective assembly of sandwich-shaped organo molecules has been achieved by conducting dual asymmetric Suzuki-Miyaura couplings and nine other reactions. This work also presents the first fully C-C anchored multi-layer 3D chirality with optically pure enantiomers. As confirmed by X-ray diffraction analysis that this chiral framework is featured by a unique C2-symmetry in which a nearly parallel fashion consisting of three layers: top, middle and bottom aromatic rings. Unlike the documented planar or axial chirality, the present chirality shows its top and bottom layers restrict each other from free rotation, i.e., this multi-layer 3D chirality would not exist if either top or bottom layer is removed. Nearly all multi-layered compounds showed strong luminescence of different colors under UV irradiation, and several randomly selected samples displayed aggregation-induced emission (AIE) properties. This work is believed to have broad impacts on chemical, medicinal and material sciences including optoelectronic materials in future.