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Lookup NU author(s): Dr Julien Eng,
Dr Thomas Penfold
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Nature Publishing Group, 2020.
For re-use rights please refer to the publisher's terms and conditions.
Magnetic recording using femtosecond laser pulses has recently been achieved in some dielectric media, showing potential for ultrafast data storage applications. Single-molecule magnets (SMMs) are metal complexes with two degenerate magnetic ground states and are promising for increasing storage density, but remain unexplored using ultrafast techniques. Here we have explored the dynamics occurring after photoexcitation of a trinuclear µ3-oxo-bridged Mn(III)-based SMM, whose magnetic anisotropy is closely related to the Jahn–Teller distortion. Ultrafast transient absorption spectroscopy in solution reveals oscillations superimposed on the decay traces due to a vibrational wavepacket. Based on complementary measurements and calculations on the monomer Mn(acac)3, we conclude that the wavepacket motion in the trinuclear SMM is constrained along the Jahn–Teller axis due to the µ3-oxo and µ-oxime bridges. Our results provide new possibilities for optical control of the magnetization in SMMs on femtosecond timescales and open up new molecular-design challenges to control the wavepacket motion in the excited state of polynuclear transition-metal complexes.
Author(s): Liedy F, Eng J, McNab R, Inglis R, Penfold TJ, Brechin EK, Johansson JO
Publication type: Article
Publication status: Published
Journal: Nature Chemistry
Issue: ePub ahead of Print
Online publication date: 02/03/2020
Acceptance date: 27/01/2020
Date deposited: 05/03/2020
ISSN (print): 1755-4330
ISSN (electronic): 1755-4349
Publisher: Nature Publishing Group
Data Source Location: https://doi.org/10.7488/ds/2751
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