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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Comparative Study on Molecular Flattening of Porphyrin/rGO complexes and Their Applications to Optical Probes

2015년 9월 3일 14시 14분 40초
PHYS.P-277 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (금요일) 13:00~14:30
저자 및
이가현, 심상덕1,*
순천대학교 기초의화학부, Korea
1순천대학교 화학과, Korea

Reduced graphene oxide (rGO) sheets exhibit physical and electronic properties similar to that of graphene. In addition to its solution-processability, they are being considered in electronic, sensor, and catalytic applications. Attempts to use blends of functionalized graphene has been made for a variety of applications including biological sensors, drug delivery, and tunneling electronic properties of graphene. As a kind of well-known functional dye, porphyrin derivatives also have been used for modifying graphene via covalent or noncovalent functionalization to achieve novel optoelectronic properties. Recently it has been reported the supramolecular complexation of negatively charged rGO and cationic porphyrin, 5, 10, 15, 20-tetrakis(1-methyl-4-pyridinio)porphyrin (p-TMPyP) induced a large bathochromic shift of the porphyrin Soret band in aqueous media, primarily due to the molecular flattening of TMPyP and resultant nonplanarity of the porphyrin macrocycle accelerated the coordination reaction with specific metal ions, Cd2+. On the basis of this phenomenon the TMPyP/rGO complex could be used as a new optical probe for sensing a specific heavy metal ion with rapid sensitivity and improved selectivity toward specific ions. To study the correlation between the degree of macrocycle distortion and the selectivity, we investigate the o- and m-TMPyP/rGO as well as p-TMPyP/rGO. As expected, the o-, m-, and p-TMPyP/rGO complexes exhibit different bathchromic shifts of the Soret bands, indicating the different degree of molecular flattening. Based on this result, the selectivity control experiments of TMPyP/rGO complexes are now in progress.