120th General Meeting of the KCS

Type Symposium
Area [SRC Symposium] Biomimetic Catalysis Based on Porous Platform (BCP2)
Room No. Room 214
Time WED 16:40-:
Code KCS4-11
Subject The observation of drastic change of metal cluster in metal-organic frameworks by transmetalation
Authors Dongwook Kim, Seok Jeong, Myoung Soo Lah*
Department of Chemistry, Ulsan National Institute of Science and Technology, Korea
Abstract Metal-organic frameworks (MOF) as crystalline porous material are composed of metal ion or cluster and coordinative organic ligands. MOF are utilized for gas storage or separation, catalyst, sensing due to porosity, diversity and additional tunability to specific purpose. Post-synthetic modification (PSM) method provides an extension of applicability of MOF. PSM can lead to change of its properties or enhancement of quality of MOF with known structures. PSM is also able to induce new materials from existing framework, for example, as attachment of new functional groups, partial exchange of ligands and alternation in metal ion or cluster. Those modification methods give chance to variability, however, the analysis of structural environment about amended product is not easy because deteriorated crystallinity or limitation of analysis condition even though some properties are improved by PSM. So many of PSM-MOF were difficult to investigate structure analysis directly. In this work, we carried out transmetalation of Zn-MOF to Fe3+ under ferric chloride solution, then performed single crystal x-ray structure determination about transmetalated Fe-MOF single crystal. This structure determination supplied the observation of change of metal clusters from Zn4O(COO)6 to Fe3O(COO)6 (with one chloride for charge balance) following Zn2+ to Fe3+ ion. And we will discuss change of property in those experimental results.
E-mail dwkim@unist.ac.kr