Reticular Synthesis of One-Dimensional Covalent Organic Frameworks with 4-c sql Topology for Enhanced Fluorescence Emission |
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| Authors: | Ziao Chen Kai Wang Yumeng Tang Dr Lan Li Xuening Hu Mingxi Han Prof Zhiyong Guo Prof Hongbing Zhan Prof Banglin Chen |
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| Institution: | 1. College of Materials Science and Engineering, Fuzhou University, 350108 Fuzhou, Fujian, P. R. China;2. College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone, 350018 Hangzhou, Zhejiang, P. R. China;3. Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, 78249-0698 San Antonio, TX, USA |
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| Abstract: | Covalent organic frameworks (COFs) have been extensively investigated due to their unique structure, porosity, and functionality. However, at the topological level, COFs remain as two-dimensional (2D) or three-dimensional (3D) structures, while COFs with one-dimensional (1D) topology have not been systematically explored. In this work, we proposed a synthetic strategy for the construction of 1D-COFs based on non-linear edges and suitable high-symmetry vertices. Compared with their 2D-COFs counterparts, the 1D-COFs with AIEgens located at the vertex of the frame exhibited enhanced fluorescence. The density functional theory (DFT) calculations revealed that the dimensional-induced rotation restriction (DIRR) effect could spontaneously introduce additional non-covalent interactions between the strip frames, which could substantially diminish non-radiative transitions. This work also provides protocols for the design of 1D-COFs and a guidance scheme for the synthesis of emitting COFs. |
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| Keywords: | 1D-COFs DIRR Effect Reticular Chemistry Synthesis Methodology Topological Design |
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