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Bilayer Thin Films That Combine Luminescent and Spin Crossover Properties for an Efficient and Reversible Fluorescence Switching

1
LCC-CNRS, Université de Toulouse, CNRS, 31077 Toulouse, France
2
LAAS-CNRS, Université de Toulouse, CNRS, 31077 Toulouse, France
3
Department of Chemistry, Moldova State University, Chisinau, MD-2009, Moldova
4
Polivalent-95 SRL, Chisinau, MD-2028, Moldova
*
Authors to whom correspondence should be addressed.
Magnetochemistry 2019, 5(2), 28; https://doi.org/10.3390/magnetochemistry5020028
Received: 12 March 2019 / Revised: 6 April 2019 / Accepted: 9 April 2019 / Published: 1 May 2019
(This article belongs to the Special Issue Spin-Crossover Beyond the Immediate Tribute)
PDF [778 KB, uploaded 1 May 2019]

Abstract

We report on the vacuum thermal deposition of bilayer thin films of the luminescent complex Ir(ppy)3, tris[2-phenylpyridinato-C2,N]iridium(III), and the spin crossover complex [Fe(HB(tz)3)2], bis[hydrotris(1,2,4-triazol-1-yl)borate]iron(II). Switching the spin state of iron ions from the low spin to the high spin state around 337 K leads to a reversible jump of the luminescence intensity, while the spectrum shape and the luminescence lifetime remain unchanged. The luminescence modulation occurs due to the different UV light absorption properties of the iron complex in the two spin states and its magnitude can therefore be precisely adjusted by varying the film thickness. These multilayer luminescence switches hold potential for micro- and nanoscale thermal sensing and imaging applications.
Keywords: spin crossover, luminescence, thin films spin crossover, luminescence, thin films
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bas, A.-C.; Thompson, X.; Salmon, L.; Thibault, C.; Molnár, G.; Palamarciuc, O.; Routaboul, L.; Bousseksou, A. Bilayer Thin Films That Combine Luminescent and Spin Crossover Properties for an Efficient and Reversible Fluorescence Switching. Magnetochemistry 2019, 5, 28.

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