Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State

Munetaka Iwamura; Airi Fukui; Koichi Nozaki; Hikaru Kuramochi; Satoshi Takeuchi; Tahei Tahara

doi:10.1002/anie.202011813

Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State

Munetaka Iwamura^*, Airi Fukui, Koichi Nozaki, Hikaru Kuramochi, Satoshi Takeuchi, Tahei Tahara^*

^*Corresponding author for this work

Program of Chemistry

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

17 Scopus citations

Abstract

Femtosecond time-resolved absorption and picosecond time-resolved emission measurements were carried out for highly concentrated aqueous solutions of K₂[Pt(CN)₄] to investigate excited-state dynamics of the [Pt(CN)₄²⁻] oligomers formed with metallophilic interactions. Time-resolved absorption spectra exhibit complicated dynamics that are represented with five time constants. Among them, the 90-ps and 400-ps dynamics were assigned to the S₁ → T₁ intersystem crossing of the trimer and tetramer coexisting in the solution by comparison with the fluorescence decays. Clear oscillations of transient absorption were observed in the first few picoseconds, and the frequency-detected-wavelength 2D analysis revealed that the 135-cm⁻¹ and 65-cm⁻¹ oscillations arise from the Pt–Pt stretch motions of the S₁ trimer and S₁ tetramer, respectively. The obtained time-resolved spectroscopic data provide a clear view of the excited-state dynamics of the [Pt(CN)₄²⁻] oligomers in the femto-/picosecond time region.

Original language	English
Pages (from-to)	23154-23161
Number of pages	8
Journal	Angewandte Chemie - International Edition
Volume	59
Issue number	51
DOIs	https://doi.org/10.1002/anie.202011813
State	Published - 2020/12/14

Keywords

Femtochemistry
metal-metal interactions
oligomerization
platinum
time-resolved spectroscopy

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1002/anie.202011813

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title = "Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State",

abstract = "Femtosecond time-resolved absorption and picosecond time-resolved emission measurements were carried out for highly concentrated aqueous solutions of K2[Pt(CN)4] to investigate excited-state dynamics of the [Pt(CN)42−] oligomers formed with metallophilic interactions. Time-resolved absorption spectra exhibit complicated dynamics that are represented with five time constants. Among them, the 90-ps and 400-ps dynamics were assigned to the S1 → T1 intersystem crossing of the trimer and tetramer coexisting in the solution by comparison with the fluorescence decays. Clear oscillations of transient absorption were observed in the first few picoseconds, and the frequency-detected-wavelength 2D analysis revealed that the 135-cm−1 and 65-cm−1 oscillations arise from the Pt–Pt stretch motions of the S1 trimer and S1 tetramer, respectively. The obtained time-resolved spectroscopic data provide a clear view of the excited-state dynamics of the [Pt(CN)42−] oligomers in the femto-/picosecond time region.",

keywords = "Femtochemistry, metal-metal interactions, oligomerization, platinum, time-resolved spectroscopy",

author = "Munetaka Iwamura and Airi Fukui and Koichi Nozaki and Hikaru Kuramochi and Satoshi Takeuchi and Tahei Tahara",

note = "Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",

year = "2020",

month = dec,

day = "14",

doi = "10.1002/anie.202011813",

language = "英語",

volume = "59",

pages = "23154--23161",

journal = "Angewandte Chemie - International Edition",

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T1 - Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State

AU - Iwamura, Munetaka

AU - Fukui, Airi

AU - Nozaki, Koichi

AU - Kuramochi, Hikaru

AU - Takeuchi, Satoshi

AU - Tahara, Tahei

PY - 2020/12/14

Y1 - 2020/12/14

N2 - Femtosecond time-resolved absorption and picosecond time-resolved emission measurements were carried out for highly concentrated aqueous solutions of K2[Pt(CN)4] to investigate excited-state dynamics of the [Pt(CN)42−] oligomers formed with metallophilic interactions. Time-resolved absorption spectra exhibit complicated dynamics that are represented with five time constants. Among them, the 90-ps and 400-ps dynamics were assigned to the S1 → T1 intersystem crossing of the trimer and tetramer coexisting in the solution by comparison with the fluorescence decays. Clear oscillations of transient absorption were observed in the first few picoseconds, and the frequency-detected-wavelength 2D analysis revealed that the 135-cm−1 and 65-cm−1 oscillations arise from the Pt–Pt stretch motions of the S1 trimer and S1 tetramer, respectively. The obtained time-resolved spectroscopic data provide a clear view of the excited-state dynamics of the [Pt(CN)42−] oligomers in the femto-/picosecond time region.

AB - Femtosecond time-resolved absorption and picosecond time-resolved emission measurements were carried out for highly concentrated aqueous solutions of K2[Pt(CN)4] to investigate excited-state dynamics of the [Pt(CN)42−] oligomers formed with metallophilic interactions. Time-resolved absorption spectra exhibit complicated dynamics that are represented with five time constants. Among them, the 90-ps and 400-ps dynamics were assigned to the S1 → T1 intersystem crossing of the trimer and tetramer coexisting in the solution by comparison with the fluorescence decays. Clear oscillations of transient absorption were observed in the first few picoseconds, and the frequency-detected-wavelength 2D analysis revealed that the 135-cm−1 and 65-cm−1 oscillations arise from the Pt–Pt stretch motions of the S1 trimer and S1 tetramer, respectively. The obtained time-resolved spectroscopic data provide a clear view of the excited-state dynamics of the [Pt(CN)42−] oligomers in the femto-/picosecond time region.

KW - Femtochemistry

KW - metal-metal interactions

KW - oligomerization

KW - platinum

KW - time-resolved spectroscopy

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U2 - 10.1002/anie.202011813

DO - 10.1002/anie.202011813

M3 - 学術論文

C2 - 33022885

AN - SCOPUS:85096692781

SN - 1433-7851

VL - 59

SP - 23154

EP - 23161

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 51

ER -

Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State

Abstract

Keywords

ASJC Scopus subject areas

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