Heteroleptic Tripalladium(II) Cages

Abstract

There is a concerted attempt to develop selfassembled metallo-cages of greater structural complexity, and heteroleptic Pd II cages are emerging as prime candidates in these efforts. Most of these are dinuclear: few examples of higher nuclearity have been reported. We demonstrate here a robust method for the formation of tripalladium(II) cages from the 2 : 3 : 3 combination of a tritopic ligand, Pd II , and a selection of ditopic ligands of the correct size and geometry.

Directing metallo-supramolecular assembly through complementarity

“…There have been multiple examples of the successful use of this strategy from the Clever group, 21,22 the Severin group, [23][24][25] the Chand group 26,27 and a recent report from ourselves. 28 Similar results have been reported with low symmetry ligands in the formation of homoleptic but reduced symmetry cages, by the groups of Lewis, [29][30][31] Yuasa 32 and from Zhang, Wang and co-workers. 33 Another approach with square planar metal ions that is perhaps more applicable to the direction of this Feature Article is more similar to previous examples given which depend wholly on the character of the ligand binding sites.…”

“…There have been multiple examples of the successful use of this strategy from the Clever group, 21,22 the Severin group, 23–25 the Chand group 26,27 and a recent report from ourselves. 28 Similar results have been reported with low symmetry ligands in the formation of homoleptic but reduced symmetry cages, by the groups of Lewis, 29–31 Yuasa 32 and from Zhang, Wang and co-workers. 33…”

Self-Assembly of Two Tubular Metalloligand-Based Palladium–Organic Cages as Hosts for Polycyclic Aromatic Hydrocarbons

“…A gigantic number of MOCs with varied structures have been fabricated. Cages with the general formula Pd n L 2 n are one type of typical MOC. − Among these Pd n L 2 n MOCs, tubular Pd 3 L 6 and Pd 4 L 8 are very interesting, − and structural transformation can happen when the external conditions are changed, such as the solvent , and anion. ,,, Although many tubular Pd 3 L 6 and Pd 4 L 8 cages have been studied, limited studies about their host–guest chemistry have been conducted probably due to their open structure.…”

Molecular engineering of confined space in metal–organic cages

“…38,39) to form homologous trinuclear heteroleptic cages, exploiting the differing denticities of the ligands to achieve heteroleptic cages with C 3 symmetry. 63…”