Generation of a Dynamic System of Three‐Dimensional Tetrahedral Polycatenanes

Abstract

Seven of the best: A dynamic combinatorial library of polycatenated tetrahedra was prepared by complexation between a dynamic Fe4L6 tetrahedral cage, constructed from ligands containing an electron‐deficient naphthalenediimide core, and an electron‐rich aromatic crown ether, 1,5‐dinaphtho[38]crown‐10. The highest order species in the library is the tetrahedral [7]catenane.Permissions: WILEY-VCH

Metal ions in the synthesis of interlocked molecules and materials

“…64 [7]catenane structure with the naphthalene diimide units threading through the macrocycles (Fig 14). 66 Interestingly, when a smaller tetrahedral cage was prepared, steric constraints prevented saturation of the naphthalene diimide sites, with evidence of only two macrocycles being incorporated into the assembly. …”

Vertical Assembly of Giant Double‐ and Triple‐Decker Spoked Wheel Supramolecular Structures

“…For the complex S 2 , the 1 H NMR spectrum exhibited broad resonance peaks presumably owing to the low tumbling motion on the NMR time scale for the large supramolecular architecture. [18] Three characteristic singlets corresponding to tpy H 3′,5′ protons were observed at 8.89, 8.78, and 8.60 ppm with downfield shifts, along with the upfield shifts of tpy H 6,6″ protons compared to L 2 and T . Additionally, the methylene and methoxy protons at 4.44 and 3.88 ppm also exhibited down-field shifts, agreeing with the expected structure.…”

“…1 H NMR spectrum of S 5 displayed a complex and broad resonance in the aromatic region, which was attributed to the conformational heterogeneity of the giant supramolecular structure. [18] Nevertheless, there were two diagnostic triplets at 4.46 and 4.25 ppm (methylene groups) and two sharp singlets at 3.86 and 3.92 ppm (methoxy groups) in the non-aromatic region, suggesting the formation of the expected discrete structure (Figure S59). The ESI mass spectrum of S 6 (Figure 3a) showed eleven distinct peaks with continuous charge states (from 13 + to 23 +) confirming the molecular composition of 6 L 6 units, 3 T units, 36 Cd 2+ ions, and 72 PF 6 − units.…”

Catenation and encapsulation induce distinct reconstitutions within a dynamic library of mixed-ligand Zn4L6 cages

“…Given that this stoichiometry exceeds the degree of catenation previously observed for N 6 (Fig. 4), we infer that the third crown ether is not likely to be catenated 16,24…”