Comparative Photophysics of Platinum(II) and Platinum(IV) Porphyrins

Dongho Kim; Dewey Holten; Martin Gouterman; Johann W. Buchler

doi:10.1021/ja00326a021

Comparative Photophysics of Platinum(II) and Platinum(IV) Porphyrins

Dongho Kim, Dewey Holten, Martin Gouterman, Johann W. Buchler

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

Absorption changes and kinetic behavior produced by excitation of Pt^II(TPP) and Pt^IV(TTP)Cl₂ with 35-ps flashes at 355 and 532 nm are reported. (TPP is tetraphenylporphyrin; TTP is tetratolylporphyrin.) The transient difference spectrum obtained for the Pt(II) compound persists for >10 ns and is assigned to the lowestring triplet, ³T (π, π^*). Similar results were found for Pd^II(TPP). On the other hand, the absorption changes obtained for the Pt^IV compound decay rapidly, with a time constant of 45 ± 10 ps. This transient behavior is ascribed to a low-lying ring-to-metal [a_2u(π)d_x²-y²] charge-transfer state predicted by theory.

Original language	English
Pages (from-to)	4015-4017
Number of pages	3
Journal	Journal of the American Chemical Society
Volume	106
Issue number	14
DOIs	https://doi.org/10.1021/ja00326a021
Publication status	Published - 1984 Jan

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja00326a021

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title = "Comparative Photophysics of Platinum(II) and Platinum(IV) Porphyrins",

abstract = "Absorption changes and kinetic behavior produced by excitation of PtII(TPP) and PtIV(TTP)Cl2 with 35-ps flashes at 355 and 532 nm are reported. (TPP is tetraphenylporphyrin; TTP is tetratolylporphyrin.) The transient difference spectrum obtained for the Pt(II) compound persists for >10 ns and is assigned to the lowestring triplet, 3T (π, π*). Similar results were found for PdII(TPP). On the other hand, the absorption changes obtained for the PtIV compound decay rapidly, with a time constant of 45 ± 10 ps. This transient behavior is ascribed to a low-lying ring-to-metal [a2u(π)dx2-y2] charge-transfer state predicted by theory.",

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journal = "Journal of the American Chemical Society",

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TY - JOUR

T1 - Comparative Photophysics of Platinum(II) and Platinum(IV) Porphyrins

AU - Kim, Dongho

AU - Holten, Dewey

AU - Gouterman, Martin

AU - Buchler, Johann W.

PY - 1984/1

Y1 - 1984/1

N2 - Absorption changes and kinetic behavior produced by excitation of PtII(TPP) and PtIV(TTP)Cl2 with 35-ps flashes at 355 and 532 nm are reported. (TPP is tetraphenylporphyrin; TTP is tetratolylporphyrin.) The transient difference spectrum obtained for the Pt(II) compound persists for >10 ns and is assigned to the lowestring triplet, 3T (π, π*). Similar results were found for PdII(TPP). On the other hand, the absorption changes obtained for the PtIV compound decay rapidly, with a time constant of 45 ± 10 ps. This transient behavior is ascribed to a low-lying ring-to-metal [a2u(π)dx2-y2] charge-transfer state predicted by theory.

AB - Absorption changes and kinetic behavior produced by excitation of PtII(TPP) and PtIV(TTP)Cl2 with 35-ps flashes at 355 and 532 nm are reported. (TPP is tetraphenylporphyrin; TTP is tetratolylporphyrin.) The transient difference spectrum obtained for the Pt(II) compound persists for >10 ns and is assigned to the lowestring triplet, 3T (π, π*). Similar results were found for PdII(TPP). On the other hand, the absorption changes obtained for the PtIV compound decay rapidly, with a time constant of 45 ± 10 ps. This transient behavior is ascribed to a low-lying ring-to-metal [a2u(π)dx2-y2] charge-transfer state predicted by theory.

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Comparative Photophysics of Platinum(II) and Platinum(IV) Porphyrins

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