標題: Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system
作者: Chang, Chih-Wei
Lee, Rei-Yun
Diau, Eric Wei-Guang
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 13-三月-2013
摘要: We investigated the energy transfer dynamics in a phosphorescent host-guest system. Two spirobifluorene derivatives, [2,7-bis(2,2-diphenylvinyl)-9,9'-spirobifluorene] (DPVSBF) and [2,7-bis(1,2,2-triphenylvinyl)-9,9'-spirobifluorene] (TPVSBF), were doped with the red phosphor complex [Os(bpftz)(2)(PPh2Me)(2)] (Os-R). The two hosts exhibit similar host-to-guest energy transfer efficiencies; however, the backward energy transfer from the Os-R complex to TPVSBF is slower than that from Os-R to DPVSBF. Quantum chemical calculations suggest that the backward energy transfer dynamics are related to the host's triplet-state energy level. The greater energy of the TPVSBF triplet state compared to that of DPVSBF plays a crucial role in its ability to confine triplet excitons in Os-R. (C) 2013 Elsevier B. V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.cplett.2013.01.038
http://hdl.handle.net/11536/21174
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2013.01.038
期刊: CHEMICAL PHYSICS LETTERS
Volume: 561
Issue: 
起始頁: 52
結束頁: 56
顯示於類別:期刊論文


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