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[摘要]:A fully rigid tetrakisimidazolium macrocycle was synthesized in good yield for the first time through direct [2+2] cyclization. The structure was characterized by NMRs, MS and X-ray diffraction analysis. This cationic, fluorescent macrocycle with four hydrogen bond donors pointing inward the large and rigid cavity may serve as an anion receptor, a fluorescent material and a building block for supramolecular assembly. |
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