120th General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code INOR.P-17
Subject Reversible Crystal Transformation between Cubane and Stairstep Cu4I4 Clusters of Cu(I) Coordination Polymers Base on a mixed N/S Donor Ligand
Authors Hansu Im, Hyunjin Park, Tae Ho Kim*, Jineun Kim*
Department of Chemistry, Gyeongsang National University, Korea
Abstract The copper(I) compounds, [Cu4I4L4] (1), [Cu4I4L2MeCN]n (2) and {[Cu4I4L2]·MeOH}n (3), containing a mixed N/S donor ligand, 2-(benzylthio)-N-(pyridin-3-yl)acetamide (L) has been synthesized and structurally characterized by single crystal X-ray diffraction analyses. Compound 1, 2 and 3 were crystallized in the space group tetragonal I41/a, orthorhombic Pbca and monoclinic P21/n, respectively. Compounds 1 and 3 are composed of cubane Cu4I4 cluster nodes. Compound 1 shows a discrete structure, whereas 3 shows a 2D network structure with solvate MeOH molecules. Compound 2 shows a 2D network structure based onf stair-step Cu4I4 cluster nodes. Remarkably, crystal-to-crystal transformations between 1 and 2 was accompanied by conversion between stair step and cubane Cu4I4 clusters by addition of L and CuI. Compound 2 was transformed to 3 by addition of methanol and compound 3 was transformed to 2 by exposure of acetonitrile vapor. Therefore, the transformations between supramolecular isomers 2 and 3 are completely reversible.
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