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학술발표회초록보기

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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Efficient Light Harvesting and Energy Transfer in Deep-Red Phosphorescent Iridium Dendrimer

등록일
2014년 8월 28일 16시 54분 56초
접수번호
1326
발표코드
IND.P-114 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
공업화학
저자 및
공동저자
장설, 손호진, 강상욱*
고려대학교 소재화학과, Korea
A series of deep-red phosphorescent iridium dendrimers of the type of [Ir(btp)2(pic-PCn)] (Ir-Gn; n = 0, 1, 2 and 3) were prepared in good yield. Harvesting photons on PCn dendrons followed by efficient energy transfer to the iridium center resulted in highly red emissions at around 600 nm by metal-to-ligand charge transfer (3MLCT). The intensity of phosphorescence was gradually enhanced as increasing dendrimer generations. Steady-state and time-resolved spectroscopy were used to investigate the energy transfer mechanism. Based on fluorescence quenching rate-constants of PCn dendrons, the energy transfer efficiencies for Ir-G1, Ir-G2, and Ir-G3 were 99, 98, and 96%, respectively. The energy transfer efficiency for higher generations decreased slightly due to the longer distance between PC dendrons and the core Ir (III) complex which indicated that energy transfer in Ir-Gn is F?rster type energy transfer.

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