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Multi-layer 3D chirality:new synthesis,AIE and computational studies

Science China Chemistry 2020年第5期63卷 692-698页

作者： Yangxue Liu Guanzhao Wu Zhen Yang Hossein Rouh Nandakumar Katakam Sultan Ahmed Daniel Unruh Zhonghua Cui Hans Lischka Guigen Li Department of Chemistry and Biochemistry Texas Tech UniversityLubbockTexas 79409USA Institute of Chemistry and Biomedical Sciences School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130021China School of Pharmaceutical Sciences and Technology Tianjin UniversityTianjin 300072China Beijing National Laboratory for Molecular Sciences Beijing 100190China

New synthesis of multi-layer 3 D chiral molecules has been developed under novel conditions to give better *** aggregation-induced emission(AIE),UV irradiation/excitation,charge transfer(CT)and local excited(LE)ππ*transitions have been investigated on a representative individual enantiomer of pseudo C_2 asymmetry which was made possibly by differentiating moieties on phosphorous on N-phosphonyl ring of chiral sandwich ***,a new tandem C–N/C–C coupling reaction was unexpectedly rendered providing a novel access to special benzo[a]carbazoles.

关键词： multi-layer 3D chirality organo sandwich chirality architecture chirality aggregation-induced emission(AIE) charge transfer(CT)

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Enantioselective assembly of multi-layer 3D chirality

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National Science Review 2020年第3期7卷 588-599页

作者： Guanzhao Wu Yangxue Liu Zhen Yang Tao Jiang Nandakumar Katakam Hossein Rouh Liulei Ma Yao Tang Sultan Ahmed Anis U.Rahman Hongen Huang Daniel Unruh Guigen Li Institute of Chemistry and Bio Medical Sciences School of Chemistry and Chemical EngineeringNanjing University Department of Chemistry and Biochemistry Texas Tech University School of Medicine and Pharmacy Ocean University of China

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 3 D 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 3 D 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.

关键词： multi-layer 3D chirality organo sandwich chirality C2-symmetry multi-layered organic framework(M-LOF) architecture chirality aggregation-induced emission(AIE)

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