Pulsed-laser switching in the bistability domain of a cooperative spin crossover compound: A critical study through calorimetry
Resumen: The photoswitching from the low spin (LS) to high spin (HS) state and the reverse process in the bistability domain of spin crossover (SCO) compounds is a promising function to be used in molecular electronic devices, and evidenced mainly through spectroscopy. The phenomenon, and in particular its mechanism, is however still under debate since some controversial experimental results have been reported. Here we present a calorimetric experimental study of the photoswitching of the [Fe(pyrazine)Pt(CN)4] SCO material by a nanosecond-pulsed green laser. Our results confirm that the single laser pulse of varying energies results in significant LS to HS transformations and show that calorimetry provides an accurate quantification of the overall conversion. Successive pulses allow increasing the conversion, achieving a maximum of 60% under our experimental conditions. The HS to LS transformation is on the other hand not induced at any laser fluences contrary to previous reports. The results are compared with those reported with Raman spectroscopy and critically discussed in terms of efficiency of the transformation and potential thermal effects.
Idioma: Inglés
DOI: 10.1021/acs.jpcc.5b05864
Año: 2015
Publicado en: Journal of Physical Chemistry C 119, 30 (2015), 17334-17343
ISSN: 1932-7447

Factor impacto: 4.509 (2015)
Categ. JCR: CHEMISTRY, PHYSICAL rank: 30 / 144 = 0.208 (2015) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 39 / 270 = 0.144 (2015) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 22 / 82 = 0.268 (2015) - Q2 - T1

Financiación: info:eu-repo/grantAgreement/ES/DGA/E100
Financiación: info:eu-repo/grantAgreement/ES/DGA/E98-MOLCHIP
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2011-24284
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2011-27233-C02-02
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CSD2007-00010
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2011-23862-C02-01
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2013-46275-P
Tipo y forma: Article (PostPrint)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)

Exportado de SIDERAL (2018-03-09-14:55:21)

Este artículo se encuentra en las siguientes colecciones:
articulos > articulos-por-area > ciencia_de_los_materiales_e_ingenieria_metalurgica
articulos > articulos-por-area > fisica_de_la_materia_condensada

 Notice créée le 2018-03-09, modifiée le 2018-03-10

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