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• W2094861770 abstract "A dicopper(I)-complexed [3]-rotaxane was prepared in 34% yield by a transition-metal-templated strategy involving a bis-chelating molecular thread, macrocycles incorporating the complementary chelating unit, and porphyrin stoppers as key components. A tetracopper(I)-complexed [5]-rotaxane was obtained as a byproduct in 8% yield. Coordination chemistry was performed either at the 2,9-diphenyl-1,10-phenanthroline (dpp) chelates or at the porphyrin stoppers. The latter were metalated by either Zn(II), Au(III), or Zn(II) and Au(III). Both Cu(I) template cations could be removed by competitive complexation with CN- when at least one porphyrin stopper was complexed with Au(III), the other one being metalated with either Au(III) or Zn(II). This provided two strictly defined [3]-rotaxanes, in which the macrocycle and the molecular thread are not held together by metal coordination. Rather, dethreading is prevented by the bulky metalloporphyrin stoppers. Unexpectedly, when both stoppers were complexed with Zn(II),..." @default.
• W2094861770 created "2016-06-24" @default.
• W2094861770 creator A5020387146 @default.
• W2094861770 creator A5033156829 @default.
• W2094861770 creator A5041165489 @default.
• W2094861770 date "1999-04-01" @default.
• W2094861770 modified "2023-09-25" @default.
• W2094861770 title "Porphyrin-Stoppered [3]- and [5]-Rotaxanes" @default.
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• W2094861770 doi "https://doi.org/10.1021/ja9824829" @default.
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