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A new supramolecular species of naphthalene‐diimide cyclophane containing triazole units was synthesized, and its fluorescent responses to metal ions were investigated in dichloromethane (DCM). The fluorescence emission of NDI was quenched by intramolecular electron transfer, whereas the appearance of dimer emission of the naphthalene‐diimide in the presence of Mg2+, Ba2+, Hg2+, Ca2+, Zn2+ and Pb2+...
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