Spin-Crossover in an Exfoliated 2D Coordination Polymer and Its Implementation in Thermochromic Films
Suárez García, Salvio (Institut Català de Nanociència i Nanotecnologia)
Adarsh, Nayarassery N. (Institut Català de Nanociència i Nanotecnologia)
Molnár, Gábor (Université de Toulouse)
Bousseksou, Azzedine (Université de Toulouse)
Garcia, Yann (Université Catholique de Louvain)
Dîrtu, Marinela M. (Université Catholique de Louvain)
Saiz-Poseu, Javier (Institut Català de Nanociència i Nanotecnologia)
Robles, Roberto (Institut Català de Nanociència i Nanotecnologia)
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
Ruiz-Molina, Daniel (Institut Català de Nanociència i Nanotecnologia)

Data:	2018
Resum:	Development of novel 2D materials with singular and thrilling properties has aroused large interest due to the novel unexpected applications that can be derived from there. In this sense, coordination polymers (CPs) have appeared as matching candidates thanks to their rational chemical design and the added-value properties given by the presence of metal ions. This is the case of switchable spin-crossover systems that have been proposed as excellent candidates for data storage or sensing, among others. Here we report the delamination of crystals of the 2D spin-crossover (SCO) {[Fe(L1)2](ClO4)2}∝ (1) CP by liquid-phase exfoliation (LPE) in water. The application of this top-down technique results in the formation of flakes with controlled thicknesses, down to 1-2 nm thick (mostly mono- and bilayer), that retain the chemical composition and SCO interconversion of the bulk material. Moreover, these flakes can be handled as stable colloidal dispersions for many days. This allows for a controlled transfer to solid substrates and the formation of thermochromic polymeric films as a proof-of-concept of device. These first results will definitely open new venues and opportunities for the investigation and future integration of these original switchable 2D materials in devices.
Ajuts:	Ministerio de Economía y Competitividad MAT2015-70615-R Ministerio de Economía y Competitividad CTQ2015-65439-R Ministerio de Economía y Competitividad FIS2015-64886-C5-3-P Ministerio de Economía y Competitividad BES-2015-071492 Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-301 European Commission 676598
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	2D coordination polymer ; Delamination ; Iron complex ; Liquid-phase exfoliation ; Sonication ; Spin crossover
Publicat a:	ACS applied nano materials, Vol. 1, Núm. 6 (June 2018) , p. 2662-2668, ISSN 2574-0970

DOI: 10.1021/acsanm.8b00341

Post-print 10 p, 2.7 MB

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