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

Abstract

We observed the unusual crystal transformation from solid AgNO3 to Ag(I)‐encapsulated fullerene (C60) microcrystal by a coordination‐driven crystallization, when casting C60 solution on AgNO3 crystal. The strong binding of Ag+‐C60 ruptures electrostatic interactions within AgNO3 lattice, forming a binary hybrid material, which was characterized by XRD, Raman spectroscopy and mass spectrometry. Our results support the fact that AgNO3 crystal can directly interact with fullerene C60 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.