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제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A new Zr-based metal-organic framework with mixed heterolinker ligands

2016년 8월 30일 15시 34분 48초
INOR.P-247 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 13일 (목요일) 11:00~12:30
저자 및
김혜현, 원소미, 나명수*
UNIST 화학과, Korea
The preparation of metal-organic frameworks(MOFs) that contain mixed heterolinker ligands is important for the modulation and the tune of the framework properties. Despite tremendous endeavor, it is still difficult to synthesize a new Zr-based MOF with mixed heterolinker ligands. Recently, preparations of a series of new Zr-MOFs of 10-, 11- and 12-connectivity that contain mixed heterolinker ligands are reported via sequential insertions of additional linkers into a 8-c Zr-MOF. However, one step preparation of a Zr-MOF with mixed heterolinker ligands is yet to be reported. Here, we report the one-pot solvothermal preparation of a new Zr-MOF with mixed heterolinker ligands of different lengths. The reaction of ZrOCl2 with both fumaric acid(H2fum) and 2,6-naphthalene dicarboxylic acid(H2ndc) led either a mixture of two different MOFs, MOF-801 and DUT-52, containing each single ligand or a pure single phase of a stoichiometric mixed ligand ratio depending on the ratio of the mixed ligands in the reaction conditions. The structure of the new Zr-MOF that contain both fum and ndc in a stoichiometric 1:1 ratio, [Zr6O4(OH)4(fum)3(ndc)3] (ZFN-1), was solved using X-ray powder diffraction. Even though ZFN-1 contains two different lengths of ligands, it is a net of a 12-c fcu topology. The Zr6 clusters in the frameworks are interconnected via fum to form a 2-D sheet of 6-c hxl topology and the 2-D sheets are further interconnected by using ndc to form a net of 12-c fcu topology. ZFN-1 showed the reduced stability than that of the corresponding isoreticular Zr-MOF of either pure fum or ndc probably due to the structural strain caused by the two different length of the heterolinker ligands.