Observation of excited state absorption in the V-Cr Prussian blue analogue

Luke Hedley; Mitchel Horbury; Florian Liedy; Johan Olof Johansson

doi:10.1016/j.cplett.2017.08.070

Observation of excited state absorption in the V-Cr Prussian blue analogue

Luke Hedley, Mitchel Horbury, Florian Liedy, Johan Olof Johansson

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

Abstract / Description of output

We present femtosecond transient transmission measurements of thin films of the VII/III-CrIII Prussian blue analogue (V-Cr PBA) in the spectral range 330−675nm after exciting the ligand-to-metal charge-transfer transition (LMCT) at 400nm. A global analysis including three decay-times of τ1=230fs, τ2=1.38ps and τ3>>2ns could satisfactory describe the data. We observed an excited state absorption (ESA) at 345nm, which was attributed to a charge-transfer transition from the 2E state on the Cr ions after fast intersystem crossing from the quartet manifold. An additional weak and short-lived ESA at 455nm was also observed and was tentatively attributed to the initially populated 4LMCT state.

Original language	English
Journal	Chemical Physics Letters
Early online date	8 Sept 2017
DOIs	https://doi.org/10.1016/j.cplett.2017.08.070
Publication status	E-pub ahead of print - 8 Sept 2017

Keywords / Materials (for Non-textual outputs)

Ultrafast spectroscopy
Prussian blue analogues
Charge-transfer transitions
Functional materials
Thin films
Spectroelectrochemistry

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10.1016/j.cplett.2017.08.070

20170914 Johansson ESA in VCr PBAAccepted author manuscript, 729 KBLicence: Creative Commons: Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND)

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@article{6ddf096242e44885991c8a86abae2be6,

title = "Observation of excited state absorption in the V-Cr Prussian blue analogue",

abstract = "We present femtosecond transient transmission measurements of thin films of the VII/III-CrIII Prussian blue analogue (V-Cr PBA) in the spectral range 330−675nm after exciting the ligand-to-metal charge-transfer transition (LMCT) at 400nm. A global analysis including three decay-times of τ1=230fs, τ2=1.38ps and τ3>>2ns could satisfactory describe the data. We observed an excited state absorption (ESA) at 345nm, which was attributed to a charge-transfer transition from the 2E state on the Cr ions after fast intersystem crossing from the quartet manifold. An additional weak and short-lived ESA at 455nm was also observed and was tentatively attributed to the initially populated 4LMCT state.",

keywords = "Ultrafast spectroscopy, Prussian blue analogues, Charge-transfer transitions, Functional materials, Thin films, Spectroelectrochemistry",

author = "Luke Hedley and Mitchel Horbury and Florian Liedy and Johansson, {Johan Olof}",

year = "2017",

month = sep,

day = "8",

doi = "10.1016/j.cplett.2017.08.070",

language = "English",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier",

}

TY - JOUR

T1 - Observation of excited state absorption in the V-Cr Prussian blue analogue

AU - Hedley, Luke

AU - Horbury, Mitchel

AU - Liedy, Florian

AU - Johansson, Johan Olof

PY - 2017/9/8

Y1 - 2017/9/8

N2 - We present femtosecond transient transmission measurements of thin films of the VII/III-CrIII Prussian blue analogue (V-Cr PBA) in the spectral range 330−675nm after exciting the ligand-to-metal charge-transfer transition (LMCT) at 400nm. A global analysis including three decay-times of τ1=230fs, τ2=1.38ps and τ3>>2ns could satisfactory describe the data. We observed an excited state absorption (ESA) at 345nm, which was attributed to a charge-transfer transition from the 2E state on the Cr ions after fast intersystem crossing from the quartet manifold. An additional weak and short-lived ESA at 455nm was also observed and was tentatively attributed to the initially populated 4LMCT state.

AB - We present femtosecond transient transmission measurements of thin films of the VII/III-CrIII Prussian blue analogue (V-Cr PBA) in the spectral range 330−675nm after exciting the ligand-to-metal charge-transfer transition (LMCT) at 400nm. A global analysis including three decay-times of τ1=230fs, τ2=1.38ps and τ3>>2ns could satisfactory describe the data. We observed an excited state absorption (ESA) at 345nm, which was attributed to a charge-transfer transition from the 2E state on the Cr ions after fast intersystem crossing from the quartet manifold. An additional weak and short-lived ESA at 455nm was also observed and was tentatively attributed to the initially populated 4LMCT state.

KW - Ultrafast spectroscopy

KW - Prussian blue analogues

KW - Charge-transfer transitions

KW - Functional materials

KW - Thin films

KW - Spectroelectrochemistry

UR - http://www.sciencedirect.com/science/article/pii/S0009261417308382

U2 - 10.1016/j.cplett.2017.08.070

DO - 10.1016/j.cplett.2017.08.070

M3 - Article

SN - 0009-2614

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Observation of excited state absorption in the V-Cr Prussian blue analogue

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Ultrafast Laser Control of Spin Motion in High-Tc Molecule-Based Magnets

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Observation of excited state absorption in the V-Cr Prussian blue analogue

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Keywords / Materials (for Non-textual outputs)

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Ultrafast Laser Control of Spin Motion in High-Tc Molecule-Based Magnets

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