Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 52-56 |
| Number of pages | 5 |
| Journal | Chemical Physics Letters |
| Volume | 561-562 |
| DOIs | |
| Publication status | Published - 2013 Mar 13 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
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Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system. / Chang, Chih Wei; Lee, Rei Yun; Diau, Eric Wei Guang.
In: Chemical Physics Letters, Vol. 561-562, 13.03.2013, p. 52-56.Research output: Contribution to journal › Article
TY - JOUR
T1 - Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system
AU - Chang, Chih Wei
AU - Lee, Rei Yun
AU - Diau, Eric Wei Guang
PY - 2013/3/13
Y1 - 2013/3/13
N2 - 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.
AB - 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.
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U2 - 10.1016/j.cplett.2013.01.038
DO - 10.1016/j.cplett.2013.01.038
M3 - Article
AN - SCOPUS:84874654715
VL - 561-562
SP - 52
EP - 56
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -