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Metal‐Ion Metathesis in Metal–Organic Frameworks: A Synthetic Route to New Metal–Organic Frameworks
Author(s) -
Kim Yonghwi,
Das Sunirban,
Bhattacharya Saurav,
Hong Soonsang,
Kim Min Gyu,
Yoon Minyoung,
Natarajan Srinivasan,
Kim Kimoon
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201202899
Subject(s) - metal organic framework , powder diffraction , metal , sorption , ion exchange , inductively coupled plasma , single crystal , inorganic chemistry , crystal structure , materials science , metal ions in aqueous solution , chemistry , crystallography , ion , organic chemistry , adsorption , physics , plasma , quantum mechanics
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.