Coronene Nanophase within Coordination Spheres: Increased Solubility of C₆₀

Abstract

A 4.6 nm-sized coordination sphere confines 24 pendant coronene molecules at its core. The confined coronene molecules are fluid, forming a liquid "coronene nanodroplet" that could never exist in bulk. C(60) dissolves in this nano solvent with a high local concentration.

Control over Electrochemical Water Oxidation Catalysis by Preorganization of Molecular Ruthenium Catalysts in Self‐Assembled Nanospheres

“…Owing to the low solubility of the nanosphere in water, acetonitrile with 10 % deionized water was used as solvent with 0.1  m TBAPF 6 as electrolyte. The stability of the M 12 L 24 nanospheres in the presence of 10 % D 2 O and 0.1  m TBAPF 6 was confirmed by 1 H NMR and 1 H DOSY NMR measurements (Supporting Information, Figure S18), consistent with reported data 18. Catalysis at the metal center of Ru(bda)(PySO 3 TBA) 2 under standard conditions proceeds through the steps: Ru II −OH 2 →Ru III −OH→Ru IV −OH→Ru V =O (or Ru IV −O . )…”

Wraparound Hosts for Fullerenes: Tailored Macrocycles and Cages

“…In this regard, Fujita and co-workers recently reported the self-assembly of coronene derivative 39 to form the M 12 L 24 complex 40 (M = Pd II ; L= 39, see Scheme 5). [57] Assuming that p-extended coronene platforms interact with [60]fullerene, the authors prepared nanocapsules that contain 24 coronene units. Within the cavity, a pseudo-solvent phase forms, as demonstrated from the 1 H NMR spectrum (no significant broadening or splitting of the signals).…”

Sponge-like molecular cage for purification of fullerenes

“…Host platforms containing extended p-systems have been designed because of their affinity towards the sphere-like unsaturated structure of fullerenes. In this line, several covalent or supramolecular approaches pursued include: (a) macrocyclic arene-based receptors [18][19][20][21][22][23][24] , (b) macrocyclic structures containing aromatic heterocycles [25][26][27][28] , (c) p-extended TTF receptors [29][30][31][32][33] and (d) macrocyclic or jawlike structures containing porphyrin moieties 17,[34][35][36][37][38][39][40][41][42][43][44][45] . Interestingly, Fujita and co-workers reported the use of the empty channels of a metal-organic framework (MOF) for encapsulating fullerenes upon soaking MOF crystals in fullerene-containing toluene.…”