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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
대회명 대한화학회 제121회 학술발표회 및 총회
등록일 2018년 2월 2일 14시 29분 13초
접수번호 3548
발표코드 INOR.P-45 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간 4월 19일 (목요일) 11:00~12:30
발표형식 포스터
발표분야 Inorganic Chemistry
저자 및 공동저자 Seul Gi Lee, Ji Yeon Ryu, Junseong Lee*
Department of Chemistry, Chonnam National University, Korea
제목 Construction of Ir Supramolecules via Bridge-Driven Self-Assembly Using Multi-Tetrazolyl Ligands
내용

It is still remained as a big challenge to modulate the structures of supramolecular architectures in spite of tremendous researches on supramolecular chemistry. The coordination-driven self-assembly of metal ions with electron donating groups such as pyridine has been considered as one of most convenient methods. However, the assembly is reversible and researches have tried to use more strong interactions for the formation of concrete supramolecules. Herein, we used the bridging mode of tetrazolyl groups which bind two half sandwich Ir complexes. They provided stronger bonds toward Ir metal centers and the ligands containing multiple tetrazoles could modulate the structures of supramolecular assemblies by changing the numbers and the positions of tetrazole ligands. In this study, we synthesized Ir(Ⅲ) supramolecules from 1,2-, 1,3-ditetrazolyl benzene and 1,3,5-tritetrazolyl benzene via bridge-driven self-assembly. These complexes were characterized by IR, 1H NMR, 13C NMR, Electrospray ionization mass spectrometry. Their solid state structures were also confirmed by single crystal X-ray diffraction study. The types of tetrazolyl ligands highly influence to the assemblies of Ir supramolecules, producing different architectures such as the rectangle, truncated trigonal pyramid, truncated tetrahedron. The rectangular structure was obtained from the reaction of 1,2-ditetrazolyl benzene, [Cp*IrCl2]2, AgOTf in molar ratio of 1:1:3. By changing 1,2-ditetrazolyl benzene to 1,3-one, truncated trigonal pyramidal hexa-iridium supramolecule was obtained. Even more interesting truncated tetrahedral structure was achieved by the reaction of 1,3,5-tritetrazolyl benzene, [Cp*IrCl2]2, AgOTf in molar ratio of 2:3:9. This bridge-driven self-assembly concept provides a simple new strategy and can be used in the various homo- or hetero-metallic three-dimensional self-assemblies.

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