Incorporating a Flexible Crown Ether into Neutral Discrete Self-Assemblies Driven by Metal Coordination

Abstract

Driven by metal coordination, a flexible crown ether was self-assembled into neutral discrete complexes with two organoplatinum acceptors. Specifically, a [1 + 1]-assembled structure was separated from self-assemblies with different stoichiometries by vapor diffusion of acetone into their dichloromethane solution. The formation of these crown ether-incorporated self-assemblies was confirmed by NMR, elemental analysis, and X-ray single-crystal analysis.

Supramolecular Coordination: Self-Assembly of Finite Two- and Three-Dimensional Ensembles

“…232 Neutral, Pt-based discrete assemblies containing flexible 32-member dibenzo crown ether were also synthesized and characterized by NMR and X-ray structural studies. 233 …”

Coordination-driven self-assembly of functionalized supramolecular metallacycles

“…Combining the diaza-crown ethers with 0°, 60°, and 90° di-Pt(II) acceptors lead to the facile formation of a series of geometrically distinct edge and corner functionalized supramolecules, one example of which is shown in Figure 1A. With the availability of pyridine and carboxylate functionalized macrocycles, both charged38 and neutral39 assemblies could be prepared. This work showed for the first time that conformationally flexible, di-subtitued 18 membered diaza-crown ether macrocycles can be incorporated effectively into discrete supramolecular species with Pt(II) metal acceptors.…”

“…37 Because of their ability to form strong, stable complexes with numerous alkali, alkaline earth, and transition metal cations, as well as their ability to transport such cations, diaza-crown ethers have become one of the most attractive topics in host-guest chemistry. Recently, we have synthesized both flexible pyridine 38 and sodium carboxylate 39 fuctionalized diaza-crown ethers and incorporated them into a variety of discrete supramolecules via selfassembly. Combining the diaza-crown ethers with 01, 601, and 901 di-Pt(II) acceptors led to the facile formation of a series of geometrically distinct edge and corner functionalized supramolecules, one example of which is shown in Fig.…”

Self‐Assembly of a Triangle‐Shaped, Hexaplatinum‐Incorporated, Supramolecular Amphiphile in Solution and at Interfaces

“…However, a great number of the self‐assembled supramolecular polygons and polyhedra are aesthetic structures, exhibiting little functionality 2. To adapt the decorative structures into entities with specific applications, metal–organic assemblies are now being constructed with functional groups such as crown ethers,3a–d dendrimers,3e carboranes,3f ferrocenyl units,3g and others 3h–k…”