Approach to 10-Unit “Bracelet” Frameworks Based on Coordination of Alkyl-Substituted Cucurbit[5]urils and Potassium Ions

Citations Over TimeTop 10% of 2010 papers

Abstract

The formation of 3D fused 10-membered “bracelet” frameworks derived from the alkyl-substituted curcurbit[5]urils (SQ[5]s), 1,2,4-hexamethylcucurbit[5]uril (1,2,4-HMeQ[5]), and pentacyclopentanocucurbit[5]uril (PCyHQ[5]) and K+ ions is described. These remarkable catenated structures feature trigonal-planar branching units involving three SQ[5]s connected via their bound K+ ions in a triangular manner in which the coordination of each K+ ion to the five portal carbonyl oxygen atoms of one SQ[5] as well as to a bridging portal carbonyl oxygen from an adjacent SQ[5] draws the edges of three portals into close proximity. The corresponding offset angle at each junction provides the basis for the 3D assembly of the observed fused 10-membered SQ[5] bracelet frameworks.

Related Papers

• → Polyfluorination of Aryl Alkyl Sulfides by IF₅ with Concomitant Migration of the Arylthio Group(2003)19 cited
• → Effects of Anions and Cations on Potassium Absorption by Plants of High Potassium Chloride Content(1975)17 cited
• → Thermal properties of silica-based hybrids with different alkyl chains(2016)1 cited
• → ChemInform Abstract: One‐Pot Synthesis of Alkyl 4‐Alkyl‐2,8‐dioxo‐2H,8H‐pyrano[2,3‐ f]chromene‐10‐carboxylates and Alkyl 2(E)‐3‐[(4‐Alkyl‐2‐oxo‐2H‐chromen‐ 7‐yl)oxy]acrylates.(2015)