Fluorescent Cross‐Linked Supramolecular Polymer Constructed by Orthogonal Self‐Assembly of Metal–Ligand Coordination and Host–Guest Interaction |
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| Authors: | Xiaomin Qian Dr Weitao Gong Dr Xiaopeng Li Le Fang Xiaojun Kuang Prof Guiling Ning |
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| Institution: | 1. Sate Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China;2. Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas, USA |
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| Abstract: | A new host molecule consists of four terpyridine groups as the binding sites with zinc(II) ion and a copillar5]arene incorporated in the center as a spacer to interact with guest molecule was designed and synthesized. Due to the 120 ° angle of the rigid aromatic segment, a cross‐linked dimeric hexagonal supramolecular polymer was therefore generated as the result of the orthogonal self‐assembly of metal–ligand coordination and host–guest interaction. UV/Vis spectroscopy, 1H NMR spectroscopy, viscosity and dynamic light‐scattering techniques were employed to characterize and understand the cross‐linking process with the introduction of zinc(II) ion and guest molecule. More importantly, well‐defined morphology of the self‐assembled supramolecular structure can be tuned by altering the adding sequence of the two components, that is, the zinc(II) ion and the guest molecule. In addition, introduction of a competitive ligand suggested the dynamic nature of the supramolecular structure. |
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| Keywords: | fluorescence host– guest systems morphology self-assembly supramolecular chemistry |
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