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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Novel photosensitizers for photodynamic therapy(PDT) based on aggregation induced emission enhancement(AIEE) and thermally activated delayed fluorescence(TADF)

2017년 9월 5일 16시 49분 07초
MEDI.P-371 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (목요일) 11:00~12:30
Medicinal Chemistry
저자 및
jaemoon lee, Jae Pil Kim1,*
Department of Material Engineering, Seoul National University, Korea
1Division of Material Engineering, Seoul National University, Korea
The hydrophobic nature of conventional photosensitizers makes it difficult for PSs to disperse and even causes PSs to aggregate in aqueous physiological environment. In aggregates, the planar structure of PSs maximizes the π-π intermolecular interactions and thus greatly contributes H-aggregation which reduces efficiencies of fluorescence and singlet oxygen generation, namely aggregation caused quenching(ACQ) To address this problem, considerable attention has been focused on aggregation induced emission enhancement(AIEE) in photoluminescence research area. Unlike aggregation caused quenching, by their unique rotating geometry, AIE(E) aggregates exhibit high fluorescence with increasing concentration, even in aqueous physiological environment. Aggregation induced photodynamic therapy enhancement(AIPE) inspired by AIE(E) has been studied last two years and several groups showed AIPE photosensitizers could be a promising therapeutic strategy for photodynamic therapy. Our group synthesized novel photosensitizers based on boron dipyrromethane(BODIPY) derivatives and confirmed aggregation induced photodynamic therapy enhancement(AIPE) and emission enhancement(AIEE) of these photosensitizers. Triphenylamine(TPA) moieties were introduced on a BODIPY core for an AIPE and thermally activated delayed fluorescence(TADF) phenomenons. The high-angle between donor and accepter of BODIPY induced to separate electron distribution in HOMO and LUMO, induced singlet oxygen generation without bromine. To gain further insights into the results, The optimized structures, electron distributions of all the dyes were calculated, using the density functional theory(DFT) B3LYP/6-31G(d,p) level.