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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Multipyridyl Porphyrin for Supramolecular Coordination Polymer

2016년 9월 1일 14시 21분 50초
ORGN.P-431 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 14일 (금요일) 11:00~12:30
저자 및
이호수위, 장우동*
연세대학교 화학과, Korea

We newly design an organic building block, multipyridyl-bearing porphyrin PyPM (M=H2 or Cu), composed of peripheral 8 pyridyl groups attached to focal freebase or copper porphyrin thorough acetylene bridge. We previously reported an artificial light-harvesting dendrimer PZnPFB, 8 zinc porphyrin wings (PZn) attached to the focal freebase porphyrin (PFB), that exhibits efficient energy transfer from the PZn wings to the core PFB. As PyPM were added to the dendrimer, supramolecular polymer was formed through multiple axial coordination interaction between pyridyl groups of PyPM and PZn wings in PZnPM. UV/Vis absorption spectra were recorded upon titration of PyPFB to PZnPFB. Differential spectra was obtained and exhibited clear isosbestic points with saturation binding at 1 equivalent addition of PyPFB to PZnPFB. Job’s plot analysis also indicated 1:1 stoichiometry for the saturation binding. The fibrous assembly of PZnPFB and PyPFB was well visualized by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The fluorescence emission measurement of PZnPM indicated efficient intramolecular energy transfer from PZn of PZnPM to the focal PFB or PCu of PyPM. As the structural rigidity of PyPM, PyP-MOF(Zn) were prepared using PyPM as a ligand. To obtain visual evidence of PyP-MOF(Zn), we examined the MOF through the scanning electron microscopy(SEM) and SEM images show amorphous 2-dimensinal sheets.