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Thermal and light-induced spin transition in a nanometric film of a new high-vacuum processable spin crossover complex

DOI: 10.1039/C8TC02685H DOI Help

Authors: Matteo Atzori (Università degli Studi di Firenze) , Lorenzo Poggini (Institut de Chimie de la Matière Condensée de Bordeaux) , Lorenzo Squillantini (Università degli Studi di Firenze) , Brunetto Cortigiani (Università degli Studi di Firenze) , Mathieu Gonidec (Institut de Chimie de la Matière Condensée de Bordeaux) , Peter Bencok (Diamond Light Source) , Roberta Sessoli (Università degli Studi di Firenze; ICCOM-CNR) , Matteo Mannini (Università degli Studi di Firenze)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Materials Chemistry C

State: Published (Approved)
Published: July 2018
Diamond Proposal Number(s): 12408

Abstract: Spin crossover complexes are one of the most studied classes of molecular switches and have attracted considerable attention for their potential technological use as active units in new multifunctional devices. A fundamental step towards their practical implementation is their effective processability into thin films. Crucially, the physical property of technological interest shown by these materials in the bulk phase has to be retained once they are deposited on a solid surface. These conditions are not easily satisfied by most of the intrinsically fragile coordination compounds, either because the material processing methods can compromise their molecular structure, or the interaction between the molecule and the surface can induce drastic changes into the resulting properties. Herein, we report the identification of a novel high-vacuum processable spin-crossover complex, [Fe(qnal)2] (qnal = quinoline-naphthaldehyde), and the preparation of a 50 nm sublimated film of this molecular switch on gold. X-ray Photoelectron Spectroscopy (XPS) and X-ray Absorption Spectroscopy (XAS) were used to investigate the composition and the temperature- and light-induced spin-crossover of the deposited material, providing full evidence on the capability of this molecular system to be efficiently processed into nanometric films with retention of its switchable magnetic properties.

Subject Areas: Materials, Chemistry, Physics

Instruments: I10-Beamline for Advanced Dichroism

Added On: 06/08/2018 11:41

Discipline Tags:

Surfaces Physics Physical Chemistry Chemistry Magnetism Materials Science interfaces and thin films

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)