Structural studies of a manganese(III) complex with spin-crossover and thermochromic properties - Université de Rennes Accéder directement au contenu
Article Dans Une Revue CrystEngComm Année : 2020

Structural studies of a manganese(III) complex with spin-crossover and thermochromic properties

Résumé

Thermochromism and gradual spin crossover (SCO) were observed in the [Mn-III(5-MeO-sal-N-1-5-8-12)]Cl complex. The transition temperature (T-1/2) was determined to be 281 K by the drastic changes in the unit cell. This T-1/2 value is the highest observed for this type of system using the 5-MeO-H(2)sal-N-(1-5-8-12) ligand. The gradual transition was monitored by single crystal X-ray diffraction at four temperatures (100 K, 290 K, 350 K and 400 K), and the octahedral deviation parameters were obtained to classify the spin state. Moreover, the unit cell parameters were determined at 12 different temperatures from 90 K to 400 K, and significant changes were observed in the unit cell from 250 K to 310 K, corresponding to the low-spin (LS) state to high-spin (HS) state transition or vice versa. Thermochromism in the solid state was observed at cryogenic temperatures, starting at 250 K on a single-crystal sample, representing clear evidence of the electronic transition. This work opens further opportunities to design and synthesize new SCO profiles for Mn-III complexes using Schiff base derivatives.

Domaines

Chimie
Fichier non déposé

Dates et versions

hal-02886460 , version 1 (01-07-2020)

Identifiants

Citer

David Villaman, Charles J. Mcmonagle, Michael R. Probert, Octavio Peña, Yanko Moreno, et al.. Structural studies of a manganese(III) complex with spin-crossover and thermochromic properties. CrystEngComm, 2020, 22 (18), pp.3221-3233. ⟨10.1039/c9ce01962f⟩. ⟨hal-02886460⟩
22 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More