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Synthesis and catalytic application of various porous coordination polymers 원문보기

  • 저자

    이경연

  • 학위수여기관

    高麗大學校 大學院

  • 학위구분

    국내석사

  • 학과

    化學科

  • 지도교수

    이석중

  • 발행년도

    2014

  • 총페이지

    72장

  • 키워드

    Coordination polymer MOF Heterogeneous catalyst Porphyrin;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T13541929&outLink=K  

  • 초록

    Porous coordination polymers (PCPs), also called metal-organic frameworks (MOFs) for 3D PCPs, have received much attention due to their potential applications. Currently, nano- and microsized PCPs (nPCPs or mPCPs) have often been reported with promising applications. Their novel and/or enhanced performances are frequently reported with potential applications in catalysis, separation, gas storage, drug delivery, biosensing, and imaging. In particular for the catalysis application, I thought that the utilization of PCPs would be the best strategy for homogeneous catalysts. For this reason, a series of narrowly dispersed nano- and microsized Coordination Polymer Aggregates (CPAs) has been prepared from a (porphyrin)Mn(III) biscarboxylic acid and Co(OAc)2. The morphologies have been diversified from amorphous spheres to crystalline cubes by varying reaction periods. In addition, their heterogeneous catalytic olefin oxidations are succe-ssfully demonstrated. Next, the new ligand N,N′,N″,N′″-tetrakis[3-tert-butyl-5-(4-pyridinyl) salicylidene]-1,2,4,5-benzenetetraamine (bisSalen) containing four pyridyl groups in its periphery was prepared and subsequently used as an organic linker for a Zn–bisSalen MOF. A 2D undulated sheet structure was determined from single-crystal X-ray diffraction studies. The bisSalen ligands bridge two Zn(II) ions, and one of the pyridyl groups on each side of the bisSalen ligand further coordinates to a bisSalencoordinated Zn(II) ion to provide a 2D sheet structure. The undulated 2D sheets are stacked closely together to form a 3D like structure containing well-defined 1D channels, the orientation of which is perpendicular to the 2D sheets. The geometry of the bisSalen in the MOF is not planar. The remaining uncoordinated pyridyl groups point toward the 1D channels. Because of these openly accessible pyridyl groups in the channels, the Zn–bisSalen MOF is a very active catalyst for transesterifications.


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