Direct transformation of AgNO3 complex encapsulated Fullerene (C60) microcrystal on solid silver Nitrate Crystal without organic Ligands

We observed the unusual crystal transformation from solid AgNO 3 to Ag(I)-encapsulated fullerene (C 60 ) microcrystal by a coordination-driven crystallization, when casting C 60 solution on AgNO 3 crystal. The strong binding of Ag + -C 60 ruptures electrostatic interactions within AgNO 3 lattice, forming a binary hybrid material, which was characterized by XRD, Raman spectroscopy and mass spectrometry. Our results support the fact that AgNO 3 crystal can directly interact with fullerene C 60 molecules, other than through solvated metal cations. Two major factors, namely sturdy Ag + -olefin interaction and an enclosed cage effect play the dominating roles in crystal transformation. Adding to the regular solution-based crystallization, this facial protocol is expected to render an additional dimension in fabrication of exohedral metallofullerene architecture, regardless of solubility of metal cation in anti-solvent.