Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system

Chih Wei Chang, Rei Yun Lee, Eric Wei Guang Diau

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)52-56
Number of pages5
JournalChemical Physics Letters
Volume561-562
DOIs
Publication statusPublished - 2013 Mar 13

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Phosphorescence
phosphorescence
Energy transfer
Quenching
energy transfer
quenching
atomic energy levels
Phosphors
Electron energy levels
phosphors
energy levels
excitons
Derivatives
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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title = "Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system",
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.",
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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 journalArticle

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T1 - Energy transfer and phosphorescence-quenching dynamics in a phosphorescent host-guest system

AU - Chang, Chih Wei

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AU - Diau, Eric Wei Guang

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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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