title: Platonic hexahedron composed of six organic faces with an inscribed Au cluster.
abstract: The structures of nanomaterials determine their individual properties and the suprastructures they can form. Introducing anisotropic shapes and/or interaction sites to isotropic nanoparticles has been proposed to extend the functionality and possible suprastructure motifs. Because of symmetric anisotropy, Platonic solids with regular polygon faces are one of the most promising nanoscale structures. Introduction of Platonic solid anisotropy to isotropic nanomaterials would expand the functionality and range of possible suprastructure motifs. Here, we demonstrate a novel strategy to obtain nano-Platonic solids through the face coordination of square porphyrins on an inscribed Au sphere with adequate size. The face coordination of the multidentate porphyrin derivatives, with four acetylthio groups facing the same direction, on the Au cluster encased the Au cluster in a Platonic hexahedron with six porphyrin faces. Transmission electron microscopy, mass spectrometry, elemental analysis, and scanning tunnelling microscopy were used to confirm the formation of the nano-Platonic hexahedron.
authors.affiliation: Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Sakamoto
authors.forename: Daisuke
authors.initials: D
authors.lastname: Tanaka
authors.forename: Hironori
authors.initials: H
authors.lastname: Tsunoyama
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Tsukuda
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Minagawa
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Majima
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Teranishi