Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12458/345
Title: Control of the Speed of a Light-Induced Spin Transition through Mesoscale Core-Shell Architecture
Authors: Ahmed Slimani 
Felts, A.C. 
Talham, D.R. 
Abboud, K.A. 
Cain, J.M. 
Ahir, A.R. 
Andrus, M.J. 
Boukheddaden, K. 
Meisel, M.W. 
Issue Date: 2018
Publisher: American Chemical Society
Journal: Journal of the American Chemical Society 
Abstract: The rate of the light-induced spin transition in a coordination polymer network solid dramatically increases when included as the core in mesoscale core-shell particles. A series of photomagnetic coordination polymer core-shell heterostructures, based on the light-switchable RbaCob[Fe(CN)6]c·mH2O (RbCoFe-PBA) as core with the isostructural KjNik[Cr(CN)6]l·nH2O (KNiCr-PBA) as shell, are studied using temperature-dependent powder X-ray diffraction and SQUID magnetometry. The core RbCoFe-PBA exhibits a charge transfer-induced spin transition (CTIST), which can be thermally and optically induced. When coupled to the shell, the rate of the optically induced transition from low spin to high spin increases. Isothermal relaxation from the optically induced high spin state of the core back to the low spin state and activation energies associated with the transition between these states were measured. The presence of a shell decreases the activation energy, which is associated with the elastic properties of the core. Numerical simulations using an electro-elastic model for the spin transition in core-shell particles supports the findings, demonstrating how coupling of the core to the shell changes the elastic properties of the system. The ability to tune the rate of optically induced magnetic and structural phase transitions through control of mesoscale architecture presents a new approach to the development of photoswitchable materials with tailored properties. © 2018 American Chemical Society.
URI: http://hdl.handle.net/20.500.12458/345
ISSN: 0002-7863
DOI: 10.1021/jacs.8b02148
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046429738&doi=10.1021%2fjacs.8b02148&partnerID=40&md5=94b54035567adc947fd09f0a1bcc6b50
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