Microsecond-resolved XAFS of the triplet excited state of Pt 2(P2O5H2)4-4

Daniel J. Thiel; Peteris Liviņš; Edward A. Stern; Aaron Lewis

doi:10.1038/362040a0

Microsecond-resolved XAFS of the triplet excited state of Pt ₂(P₂O₅H₂)^4-₄

Daniel J. Thiel^*, Peteris Liviņš, Edward A. Stern, Aaron Lewis

^*Corresponding author for this work

The Institute of Applied Physics

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71 Scopus citations

Abstract

Little is known about the excited-state structures of most inorganic compounds. Time-resolved resonance Raman and time-resolved infrared spectroscopies can provide only indirect structural information for short-lived excited species in solution at room temperature. Time-resolved X-ray diffraction¹ has the potential to give more direct information, but no excited-state structures have yet been reported; picosecond gas-phase electron diffraction has been proposed recently², but not yet demonstrated. Here we report a technique that combines the X-ray absorption fine-structure (XAFS) method³ with rapid-flow laser spectroscopy ⁴ to measure structural changes in a solution-phase excited-state transition-metal complex with microsecond resolution. We find that the triplet excited state of Pt₂(P₂O₅H₂) ^4-₄, with a lifetime of about 4 μs undergoes a contraction in the Pt-Pt distance of 0.52 ±0.13 Å relative to the ground state. We anticipate that time-resolved XAFS will have broad applications in chemistry and biology.

Original language	English
Pages (from-to)	40-43
Number of pages	4
Journal	Nature
Volume	362
Issue number	6415
DOIs	https://doi.org/10.1038/362040a0
State	Published - 1993

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title = "Microsecond-resolved XAFS of the triplet excited state of Pt 2(P2O5H2)4-4",

abstract = "Little is known about the excited-state structures of most inorganic compounds. Time-resolved resonance Raman and time-resolved infrared spectroscopies can provide only indirect structural information for short-lived excited species in solution at room temperature. Time-resolved X-ray diffraction1 has the potential to give more direct information, but no excited-state structures have yet been reported; picosecond gas-phase electron diffraction has been proposed recently2, but not yet demonstrated. Here we report a technique that combines the X-ray absorption fine-structure (XAFS) method3 with rapid-flow laser spectroscopy 4 to measure structural changes in a solution-phase excited-state transition-metal complex with microsecond resolution. We find that the triplet excited state of Pt2(P2O5H2) 4-4, with a lifetime of about 4 μs undergoes a contraction in the Pt-Pt distance of 0.52 ±0.13 {\AA} relative to the ground state. We anticipate that time-resolved XAFS will have broad applications in chemistry and biology.",

author = "Thiel, {Daniel J.} and Peteris Liviņ{\v s} and Stern, {Edward A.} and Aaron Lewis",

year = "1993",

doi = "10.1038/362040a0",

language = "אנגלית",

volume = "362",

pages = "40--43",

journal = "Nature",

issn = "0028-0836",

publisher = "Nature Research",

number = "6415",

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TY - JOUR

T1 - Microsecond-resolved XAFS of the triplet excited state of Pt 2(P2O5H2)4-4

AU - Thiel, Daniel J.

AU - Liviņš, Peteris

AU - Stern, Edward A.

AU - Lewis, Aaron

PY - 1993

Y1 - 1993

N2 - Little is known about the excited-state structures of most inorganic compounds. Time-resolved resonance Raman and time-resolved infrared spectroscopies can provide only indirect structural information for short-lived excited species in solution at room temperature. Time-resolved X-ray diffraction1 has the potential to give more direct information, but no excited-state structures have yet been reported; picosecond gas-phase electron diffraction has been proposed recently2, but not yet demonstrated. Here we report a technique that combines the X-ray absorption fine-structure (XAFS) method3 with rapid-flow laser spectroscopy 4 to measure structural changes in a solution-phase excited-state transition-metal complex with microsecond resolution. We find that the triplet excited state of Pt2(P2O5H2) 4-4, with a lifetime of about 4 μs undergoes a contraction in the Pt-Pt distance of 0.52 ±0.13 Å relative to the ground state. We anticipate that time-resolved XAFS will have broad applications in chemistry and biology.

AB - Little is known about the excited-state structures of most inorganic compounds. Time-resolved resonance Raman and time-resolved infrared spectroscopies can provide only indirect structural information for short-lived excited species in solution at room temperature. Time-resolved X-ray diffraction1 has the potential to give more direct information, but no excited-state structures have yet been reported; picosecond gas-phase electron diffraction has been proposed recently2, but not yet demonstrated. Here we report a technique that combines the X-ray absorption fine-structure (XAFS) method3 with rapid-flow laser spectroscopy 4 to measure structural changes in a solution-phase excited-state transition-metal complex with microsecond resolution. We find that the triplet excited state of Pt2(P2O5H2) 4-4, with a lifetime of about 4 μs undergoes a contraction in the Pt-Pt distance of 0.52 ±0.13 Å relative to the ground state. We anticipate that time-resolved XAFS will have broad applications in chemistry and biology.

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AN - SCOPUS:0027908461

SN - 0028-0836

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SP - 40

EP - 43

JO - Nature

JF - Nature

IS - 6415

ER -

Microsecond-resolved XAFS of the triplet excited state of Pt ₂(P₂O₅H₂)^4-₄

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