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제126회 대한화학회 학술발표회 및 총회 Influence of Host-Guest Interactions on the Coordination Networking of Pillar[5]-bis-trithiacrown: 1D and 2D Poly-pseudo-rotaxanes

2020년 9월 8일 15시 48분 46초
INOR.P-134 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 21일(수) 17:00~17:30
Inorganic Chemistry
저자 및
Mingyeong Shin, In-Hyeok Park1, Eunji Lee2, Shim Sung Lee*
Department of Chemistry, Gyeongsang National University, Korea
1Graduate School of Analytical Science and Technology, Chungnam National University, Korea
2Department of Chemistry, Gangneung-Wonju National University, Korea

Pillar[5]-bis-trithiacrown (L) was employed as a ditopic host both for metal ion and organic guest. Herein we report the influence of dinitrile guests [CN(CH2)nCN (n = 2-6: shortly C2-C6)] on the coordination networking of L. Assembly reaction of L with HgCl2 in the presence of the C2 guest afforded a two-dimensional (2D) coordination polymer 1, [Hg3Cl6(C2@L)]n in which the C2 guest occupies the cavity to give a (C2@L) unit and linking of these units by Hg-Cl-Hg bridges generates one-dimensional (1D) chains which are further crosslinked by Hg-(μ-Cl)2-Hg units, giving rise the 2D rectangular grid. When the above synthetic procedure was repeated with the C3 guest, a 1D coordination polymer 2, [Hg3Cl6(C3@L)]n was isolated. In 2, the C3 guest occupies the cavity and two (C3@L) units and two Hg-Cl-Hg bridges form a cyclic dimer, resulting in the generation of a poly(cyclic dimer) via other two Hg-Cl-Hg linkages. The use of the longer guests C4-C6 in the same reactions, however, yielded a discrete dimercury(II) complex 3, [Hg2Cl4(CH3CN@L)], instead of coordination networks due to the unfavorable longer lengths of the guests. The observed results show that the formation of coordination networks and their morphologies are sensitive not only to the inclusion of dinitrile guests but also to the lengths of the dinitriles included due to the confined interior space of L, suggesting the organic guests as a potent controlling factor.