title: Metal-ion metathesis in metal-organic frameworks: a synthetic route to new metal-organic frameworks.
abstract: A porous metal-organic framework, Mn(H(3)O)[(Mn(4)Cl)(3)(hmtt)(8)] (POST-65), was prepared by the reaction of 5,5',10,10',15,15'-hexamethyltruxene-2,7,12-tricarboxylic acid (H(3)hmtt) with MnCl(2) under solvothermal conditions. POST-65(Mn) was subjected to post-synthetic modification with Fe, Co, Ni, and Cu according to an ion-exchange method that resulted in the formation of three isomorphous frameworks, POST-65(Co/Ni/Cu), as well as a new framework, POST-65(Fe). The ion-exchanged samples could not be prepared by regular solvothermal reactions. The complete exchange of the metal ions and retention of the framework structure were verified by inductively coupled plasma-atomic emission spectrometry (ICP-AES), powder X-ray diffraction (PXRD), and Brunauer-Emmett-Teller (BET) surface-area analysis. Single-crystal X-ray diffractions studies revealed a single-crystal-to-single-crystal (SCSC)-transformation nature of the ion-exchange process. Hydrogen-sorption and magnetization measurements showed metal-specific properties of POST-65.
authors.affiliation: Center for Smart Supramolecules, Department of Chemistry, Pohang University of Science and Technology, Pohang, Korea.
authors.forename: Yonghwi
authors.initials: Y
authors.lastname: Kim
authors.forename: Sunirban
authors.initials: S
authors.lastname: Das
authors.forename: Saurav
authors.initials: S
authors.lastname: Bhattacharya
authors.forename: Soonsang
authors.initials: S
authors.lastname: Hong
authors.forename: Min Gyu
authors.initials: MG
authors.lastname: Kim
authors.forename: Minyoung
authors.initials: M
authors.lastname: Yoon
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Natarajan
authors.forename: Kimoon
authors.initials: K
authors.lastname: Kim
mesh_terms: D018360:Crystallography, X-Ray; D007474:Ion Exchange; D060328:Magnetic Phenomena; D019216:Metals, Heavy / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D013499:Surface Properties; D014233:Tricarboxylic Acids / Q000737:chemistry*
chemical_list: D019216:Metals, Heavy; D009942:Organometallic Compounds; D014233:Tricarboxylic Acids