Title: Ultrafast Jahn‐Teller Photoswitching in Cobalt Single‐Ion Magnets

Journal Article · · Advanced Science
ORCiD logo [1];  [2];  [3];  [2];  [4];  [2];  [2];  [2];  [2];  [2];  [5];  [6];  [7];  [2];  [8];  [6];  [9];  [2]
  1. European XFEL Holzkoppel 4 22869 Schenefeld Germany, Department of Chemistry Technical University of Denmark Kongens Lyngby DK‐2800 Denmark
  2. European XFEL Holzkoppel 4 22869 Schenefeld Germany
  3. Department of Chemistry Technical University of Denmark Kongens Lyngby DK‐2800 Denmark, Wigner Research Centre for Physics P.O. Box 49 Budapest H‐1525 Hungary
  4. European XFEL Holzkoppel 4 22869 Schenefeld Germany, XFEL Division Pohang Accelerator Laboratory Jigok‐ro 127‐80 Pohang 37673 Republic of Korea
  5. European XFEL Holzkoppel 4 22869 Schenefeld Germany, Departamento de Química Universidad Autónoma de Madrid Madrid 28049 Spain, IMDEA‐Nanociencia Calle Faraday 9 Madrid 28049 Spain, Faculty of Physics Adam Mickiewicz University Poznan 61‐614 Poland
  6. Department of Chemistry Technical University of Denmark Kongens Lyngby DK‐2800 Denmark, Chemical Physics and NanoLund Lund University Box 124 Lund 22100 Sweden
  7. Department of Chemistry Technical University of Denmark Kongens Lyngby DK‐2800 Denmark
  8. Center for Nanoscale Materials Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
  9. European Synchrotron Radiation Facility 71 Avenue des Martyrs Grenoble 38000 France

Abstract Single‐ion magnets (SIMs) constitute the ultimate size limit in the quest for miniaturizing magnetic materials. Several bottlenecks currently hindering breakthroughs in quantum information and communication technologies could be alleviated by new generations of SIMs displaying multifunctionality. Here, ultrafast optical absorption spectroscopy and X‐ray emission spectroscopy are employed to track the photoinduced spin‐state switching of the prototypical complex [Co(terpy) 2 ] 2+ (terpy = 2,2′:6′,2″‐terpyridine) in solution phase. The combined measurements and their analysis supported by density functional theory (DFT), time‐dependent‐DFT (TD‐DFT) and multireference quantum chemistry calculations reveal that the complex undergoes a spin‐state transition from a tetragonally elongated doublet state to a tetragonally compressed quartet state on the femtosecond timescale, i.e., it sustains ultrafast Jahn‐Teller (JT) photoswitching between two different spin multiplicities. Adding new Co‐based complexes as possible contenders in the search for JT photoswitching SIMs will greatly widen the possibilities for implementing magnetic multifunctionality and eventually controlling ultrafast magnetization with optical photons.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Danish Council for Independent Research; Hungarian National Research, Development and Innovation Fund; MINECO; National Science Centre Poland (NCN); Swedish Research Council; USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1974081
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 21 Vol. 10; ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (69)

Influence of the Ligand Field on Slow Magnetization Relaxation versus Spin Crossover in Mononuclear Cobalt Complexes journal September 2013
Ultrafast Photoswitching in a Copper-Nitroxide-Based Molecular Magnet journal August 2014
Single Ion Magnets from 3d to 5f: Developments and Strategies journal March 2018
Software update: The ORCA program system—Version 5.0 journal March 2022
[Co(terpy)2] [NO3]2ṡ2H2O: Tetragonal Compression with Elongated Equatorial Bonds journal April 1986
Compressed Jahn-Teller octahedra and spin quintet-triplet switching in coordinatively elastic manganese(III) complexes journal November 2021
Structure-property correlation in stabilizing axial magnetic anisotropy in octahedral Co(II) complexes journal April 2021
Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods journal May 2017
Water Molecule-Induced Reversible Magnetic Switching in a Bis-Terpyridine Cobalt(II) Complex Exhibiting Coexistence of Spin Crossover and Orbital Transition Behaviors journal October 2020
Chemical Sensitivity of Kβ and Kα X-ray Emission from a Systematic Investigation of Iron Compounds journal August 2020
Single-Crystal Study of a Low Spin Co(II) Molecular Qubit: Observation of Anisotropic Rabi Cycles journal January 2019
Unified Hamiltonian Formalism of Jahn–Teller and Pseudo-Jahn–Teller Problems in Axial Symmetries journal June 2021
Light-Induced Spin State Switching in Copper(II)-Nitroxide-Based Molecular Magnet at Room Temperature journal November 2017
Toward the Quantum Computer: Magnetic Molecules Back in the Race journal December 2015
A Criterion for the Anisotropy Barrier in Single-Molecule Magnets journal November 2007
Alternating current susceptibility, high field magnetization, and millimeter band EPR evidence for a ground S = 10 state in [Mn12O12(Ch3COO)16(H2O)4].2CH3COOH.4H2O journal July 1991
High-spin molecules: [Mn12O12(O2CR)16(H2O)4] journal March 1993
Lanthanide Double-Decker Complexes Functioning as Magnets at the Single-Molecular Level journal July 2003
Slow Magnetic Relaxation in a Family of Trigonal Pyramidal Iron(II) Pyrrolide Complexes journal December 2010
Reversible On–Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation journal August 2017
Direct Imaging of Isolated Single-Molecule Magnets in Metal–Organic Frameworks journal January 2019
Probing the 3d Spin Momentum with X-ray Emission Spectroscopy:  The Case of Molecular-Spin Transitions journal June 2006
Probing the Anisotropic Distortion of Photoexcited Spin Crossover Complexes with Picosecond X-ray Absorption Spectroscopy journal February 2014
Dynamic Jahn–Teller Effect in the Metastable High-Spin State of Solvated [Fe(terpy) 2 ] 2+ journal January 2015
Mapping the Ultrafast Changes of Continuous Shape Measures in Photoexcited Spin Crossover Complexes without Long-Range Order journal January 2015
Quantum computing in molecular magnets journal April 2001
Magnetic bistability in a metal-ion cluster journal September 1993
Ultrafast magnetic switching journal August 2002
Tracking excited-state charge and spin dynamics in iron coordination complexes journal May 2014
Molecular magnetic hysteresis at 60 kelvin in dysprosocenium journal August 2017
Light-induced spin-crossover magnet journal June 2011
A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier journal February 2016
Visualizing the non-equilibrium dynamics of photoinduced intramolecular electron transfer with femtosecond X-ray pulses journal March 2015
Molecular spintronics using single-molecule magnets journal March 2008
Molecular spins for quantum computation journal March 2019
Vibrational coherences in manganese single-molecule magnets after ultrafast photoexcitation journal March 2020
Molecular magnetism: from chemical design to spin control in molecules, materials and devices journal October 2019
Branching mechanism of photoswitching in an Fe(II) polypyridyl complex explained by full singlet-triplet-quintet dynamics journal January 2023
Can large magnetic anisotropy and high spin really coexist? journal January 2008
3d single-ion magnets journal January 2015
Molecular spin qudits for quantum algorithms journal January 2018
The rise of 3-d single-ion magnets in molecular magnetism: towards materials from molecules? journal January 2016
Guest-dependent single-ion magnet behaviour in a cobalt( ii ) metal–organic framework journal January 2016
Directly probing spin dynamics in a molecular magnet with femtosecond time-resolution journal January 2016
Transformation of the coordination complex [Co(C 3 S 5 ) 2 ] 2− from a molecular magnet to a potential qubit journal January 2016
Reversible solvatomagnetic switching in a single-ion magnet from an entatic state journal January 2017
Slow magnetic relaxation in five-coordinate spin-crossover cobalt( ii ) complexes journal January 2017
Spin states, vibrations and spin relaxation in molecular nanomagnets and spin qubits: a critical perspective journal January 2018
Photo-switched magnetic coupling in spin-crossover complexes journal January 2019
Single molecule magnet behaviour in a square planar S = 1/2 Co(ii) complex and spin-state assignment of multiple relaxation modes journal January 2020
Electroswitching of the single-molecule magnet behaviour in an octahedral spin crossover cobalt( ii ) complex with a redox-active pyridinediimine ligand journal January 2020
Controlling dynamic magnetic properties of coordination clustersviaswitchable electronic configuration journal January 2021
Out-of-equilibrium lattice response to photo-induced charge-transfer in a MnFe Prussian blue analogue journal January 2021
Photoinduced Jahn–Teller switch in Mn(iii) terpyridine complexes journal January 2022
Cobalt(ii) single-molecule magnets journal January 2010
Magnetically ordered molecule-based materials journal January 2011
Molecular spintronics journal January 2011
Cobalt single-molecule magnet journal January 2002
Crystal structure of Bis(2,2':6',2''-terpyridyl)cobalt(II) perchlorate c. 1.3 hydrate journal January 1983
Modulation of Jahn–Teller distortion and electromechanical response in a Mn 3+ spin crossover complex journal July 2020
Quanty for core level spectroscopy - excitons, resonances and band excitations in time and frequency domain journal May 2016
Molecular Nanomagnets as Quantum Simulators journal November 2011
Femtosecond X-Ray Scattering Study of Ultrafast Photoinduced Structural Dynamics in Solvated [ Co ( terpy ) 2 ] 2 + journal June 2016
Preparation, structure, and magnetic properties of a dodecanuclear mixed-valence manganese carboxylate journal September 1980
Scientific instrument Femtosecond X-ray Experiments (FXE): instrumentation and baseline experimental capabilities journal August 2019
Manipulating Magnetism in a Single Molecule journal September 2005
Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet journal October 2018
Single-Molecule Nanomagnets journal August 2010
Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument journal February 2020