journal article·2023-05-03

Reversible Single-Crystal-to-Single-Crystal Transformations in a salEen Fe(III) Spin Crossover Sponge

Rafaela T. Marques, Liliana P. Ferreira, Clara S. B. Gomes, Cátia S. D. Lopes, Carlos E. S. Bernardes, Nirod Kumar Sarangi, Tia E. Keyes, Paulo N. Martinho

Crystal Growth & Design· Volume 23· Issue 5
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Abstract

The storage of guest molecules in nonporous single crystals is an important development in the field of smart materials. We describe the synthesis and characterization of the new spin crossover Fe(III) compound [Fe(3-Br,5-Cl-salEen) 2 ]BPh 4 ·CH 3 CN·H 2 O (salEen = N -ethyl- N -(2-aminoethyl)salicylaldiminate) and its reversible single-crystal-to-single-crystal transformation upon desolvation and resolvation of the crystals. This process affects the magnetic behavior of the compound while the desolvation of single crystals is made in several steps. The magnetic profiles of the cooling/heating routines are never coincident until the compound reaches the high-spin state after complete desolvation of the single crystals. This is further reflected in temperature-dependent Raman profiles where desolvated and high spin state spectra match after the temperature cycle. Kinetic studies gave insights on the desolvation/resolvation dynamics with the new Fe(III) compound behaving as a spin crossover sponge.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Magnetism in coordination complexes · Lanthanide and Transition Metal Complexes · Metal-Catalyzed Oxygenation Mechanisms

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal

Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal

BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal

LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal

UCIBIO-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal

Associate Laboratory i4HB, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal

School of Chemical Science and National Center for Sensor Research, Dublin City University, Dublin 9, Ireland

Funding

Science Foundation Ireland · Funda??o para a Ci?ncia e a Tecnologia

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