Photophysical properties and energy transfer pathway of Er(III) complexes with Pt-porphyrin and terpyridine ligands

Min Kook Nah, Jae Buem Oh, Hwan Kyu Kim, Kyong Hoon Choi, Yong Rok Kim, Jun Gill Kang

Research output: Contribution to journalArticle

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Abstract

The photophysical properties of Er(III) complexes coordinated with platinum[5,10,15-triphenyl-20-(4-carboxyphenyO-porphyrin] (PtP) and terpyridine (tpy) ligands in organic solution were investigated. The Er-(III) complex emitted sensitized near-IR (NIR) luminescence when the PtP ligands were excited under deoxygenated conditions. The quantum yield (ΦLn) of the sensitized luminescence was 0.015%, as evaluated from luminescence lifetime. The photophysical studies and theoretical calculations suggest that the Förster resonance mechanism is very suitable for the energy transfer from PtP to the Er(III) ion and occurred through the first triplet excited state of PtP. The 12.3% energy transfer from the triplet state to the 4F 9/2 and 4I9/2 states of Er(III) occurred with a rate distribution of 3.36 × 105 and 6.67 × 10 4 s-1, respectively. In addition, the observed triplet quantum yield of the PtP ligand in [Ln(PtP)3(tpy)] proved that the energy transfer from the singlet excited state of the PtP ligand to the Er(III) ion did not take place.

Original languageEnglish
Pages (from-to)6157-6164
Number of pages8
JournalJournal of Physical Chemistry A
Volume111
Issue number28
DOIs
Publication statusPublished - 2007 Jul 19

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Porphyrins
porphyrins
Energy transfer
energy transfer
Ligands
Luminescence
ligands
Quantum yield
luminescence
Excited states
Ions
Platinum
atomic energy levels
excitation
ions
platinum
life (durability)

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Nah, Min Kook ; Oh, Jae Buem ; Kim, Hwan Kyu ; Choi, Kyong Hoon ; Kim, Yong Rok ; Kang, Jun Gill. / Photophysical properties and energy transfer pathway of Er(III) complexes with Pt-porphyrin and terpyridine ligands. In: Journal of Physical Chemistry A. 2007 ; Vol. 111, No. 28. pp. 6157-6164.
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title = "Photophysical properties and energy transfer pathway of Er(III) complexes with Pt-porphyrin and terpyridine ligands",
abstract = "The photophysical properties of Er(III) complexes coordinated with platinum[5,10,15-triphenyl-20-(4-carboxyphenyO-porphyrin] (PtP) and terpyridine (tpy) ligands in organic solution were investigated. The Er-(III) complex emitted sensitized near-IR (NIR) luminescence when the PtP ligands were excited under deoxygenated conditions. The quantum yield (ΦLn) of the sensitized luminescence was 0.015{\%}, as evaluated from luminescence lifetime. The photophysical studies and theoretical calculations suggest that the F{\"o}rster resonance mechanism is very suitable for the energy transfer from PtP to the Er(III) ion and occurred through the first triplet excited state of PtP. The 12.3{\%} energy transfer from the triplet state to the 4F 9/2 and 4I9/2 states of Er(III) occurred with a rate distribution of 3.36 × 105 and 6.67 × 10 4 s-1, respectively. In addition, the observed triplet quantum yield of the PtP ligand in [Ln(PtP)3(tpy)] proved that the energy transfer from the singlet excited state of the PtP ligand to the Er(III) ion did not take place.",
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Photophysical properties and energy transfer pathway of Er(III) complexes with Pt-porphyrin and terpyridine ligands. / Nah, Min Kook; Oh, Jae Buem; Kim, Hwan Kyu; Choi, Kyong Hoon; Kim, Yong Rok; Kang, Jun Gill.

In: Journal of Physical Chemistry A, Vol. 111, No. 28, 19.07.2007, p. 6157-6164.

Research output: Contribution to journalArticle

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T1 - Photophysical properties and energy transfer pathway of Er(III) complexes with Pt-porphyrin and terpyridine ligands

AU - Nah, Min Kook

AU - Oh, Jae Buem

AU - Kim, Hwan Kyu

AU - Choi, Kyong Hoon

AU - Kim, Yong Rok

AU - Kang, Jun Gill

PY - 2007/7/19

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N2 - The photophysical properties of Er(III) complexes coordinated with platinum[5,10,15-triphenyl-20-(4-carboxyphenyO-porphyrin] (PtP) and terpyridine (tpy) ligands in organic solution were investigated. The Er-(III) complex emitted sensitized near-IR (NIR) luminescence when the PtP ligands were excited under deoxygenated conditions. The quantum yield (ΦLn) of the sensitized luminescence was 0.015%, as evaluated from luminescence lifetime. The photophysical studies and theoretical calculations suggest that the Förster resonance mechanism is very suitable for the energy transfer from PtP to the Er(III) ion and occurred through the first triplet excited state of PtP. The 12.3% energy transfer from the triplet state to the 4F 9/2 and 4I9/2 states of Er(III) occurred with a rate distribution of 3.36 × 105 and 6.67 × 10 4 s-1, respectively. In addition, the observed triplet quantum yield of the PtP ligand in [Ln(PtP)3(tpy)] proved that the energy transfer from the singlet excited state of the PtP ligand to the Er(III) ion did not take place.

AB - The photophysical properties of Er(III) complexes coordinated with platinum[5,10,15-triphenyl-20-(4-carboxyphenyO-porphyrin] (PtP) and terpyridine (tpy) ligands in organic solution were investigated. The Er-(III) complex emitted sensitized near-IR (NIR) luminescence when the PtP ligands were excited under deoxygenated conditions. The quantum yield (ΦLn) of the sensitized luminescence was 0.015%, as evaluated from luminescence lifetime. The photophysical studies and theoretical calculations suggest that the Förster resonance mechanism is very suitable for the energy transfer from PtP to the Er(III) ion and occurred through the first triplet excited state of PtP. The 12.3% energy transfer from the triplet state to the 4F 9/2 and 4I9/2 states of Er(III) occurred with a rate distribution of 3.36 × 105 and 6.67 × 10 4 s-1, respectively. In addition, the observed triplet quantum yield of the PtP ligand in [Ln(PtP)3(tpy)] proved that the energy transfer from the singlet excited state of the PtP ligand to the Er(III) ion did not take place.

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