123rd General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code INOR.P-44
Subject Adaptive Guest Binding and Coordination Networking of Pillar[5]-bis-crowns
Authors Mingyeong Shin, Shim Sung Lee*
Department of Chemistry, Gyeongsang National University, Korea
Abstract

Pillar[5]-bis-crowns with different donor sets in the crown unit (L1: SNS and L2: SSS) have been synthesized and their three metallosupramolecules (1-3) have been obtained. First, the assembly reactions of L1 with silver(I) salts having different anions afforded two disilver(I) complexes [Ag2(L1)(ClO4)2]•2CH2Cl2 (1: perchlorate form) and [Ag2(L1)(CH3OH)2](PF6)2•2CH2Cl (1: hexafluorophosphate form). In both complexes, Ag(I) center is four-coordinated by the SNS donor set in the crown unit. The observed methanol coordination to the Ag(I) center in 2 gave us an inspiration to employ some bridging ligands to replace two individual methanol molecules which bind to each metal centers. As candidates for the bridging ligands for the linking of two Ag(I) centers, dialcohols (OH-(CH2)n-OH), dinitriles (CN-(CH2)n-CN), and dicarboxylates (-OOC-(CH2)n-COO-) are expected to show a length-selective recognition behavior depending on the values of n (1, 2, or 3..). These results might be a chemical example of the adaptive guest binding which observed in biology. Next, L2 reacts with HgBr2 to give a 1-D coordination polymer [Hg6Br12(CH3CN@L2)2]n (3) in which two L2 ligands up and down are linked by a linear Hg3Br6 unit to form a C-type dimer and the adjacent dimers are further linked by Hg-S bonds, giving rise a unique 1-D ribbon type structure with a poly(dimer) connectivity pattern.

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