Next Article in Journal
Effect of Magnetic Field and Aggregation on Electrical Characteristics of Magnetically Responsive Suspensions for Novel Hybrid Liquid Capacitor
Next Article in Special Issue
The Role of Vibrational Anharmonicity in the Computational Study of Thermal Spin Crossover
Previous Article in Journal
Recent Advances of Cellulase Immobilization onto Magnetic Nanoparticles: An Update Review
Previous Article in Special Issue
Bilayer Thin Films That Combine Luminescent and Spin Crossover Properties for an Efficient and Reversible Fluorescence Switching
Open AccessFeature PaperArticle

Iron(III) Azadiphenolate Compounds in a New Family of Spin Crossover Iron(II)–Iron(III) Mixed-Valent Complexes

1
School of Chemistry, 17 Rainforest Walk, Monash University, Clayton, VIC 3800, Australia
2
Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
*
Author to whom correspondence should be addressed.
Magnetochemistry 2019, 5(2), 37; https://doi.org/10.3390/magnetochemistry5020037
Received: 21 May 2019 / Revised: 4 June 2019 / Accepted: 6 June 2019 / Published: 12 June 2019
(This article belongs to the Special Issue Spin-Crossover Beyond the Immediate Tribute)
A new family of mixed valent, double salt spin crossover compounds containing anionic FeIII and cationic FeII compounds i.e., [FeII{(pz)3CH}2][FeIII(azp)2]2·2H2O (4), [FeII(TPPZ)2][FeIII(azp)2]2]·H2O (5) and [FeII(TPPZ)2][FeIII(azp)2]2]·H2O·3MeCN (6) (where (pz)3CH = tris-pyrazolylmethane, TPPZ = 2,3,5,6, tetrapyridylpyrazine and azp2− = azadiphenolato) has been synthesized and characterised. This is the first time that the rare anionic spin crossover species, [FeIII(azp)2], has been used as an anionic component in double salts complexes. Single crystal structures and magnetic studies showed that compound 6 exhibits a spin transition relating to one of the FeIII centres of the constituent FeII and FeIII sites. Crystal structures of the anionic and cationic precursor complexes were also analysed and compared to the double salt products thus providing a clearer picture for future crystal design in double spin crossover materials. We discuss the effects that the solvent and counterion had on the crystal packing and spin crossover properties. View Full-Text
Keywords: spin crossover; mixed valent; double salts; mixed FeII–FeIII; magnetic properties; crystal structures spin crossover; mixed valent; double salts; mixed FeII–FeIII; magnetic properties; crystal structures
Show Figures

Graphical abstract

MDPI and ACS Style

Phonsri, W.; Macedo, D.S.; Lewis, B.A.I.; Wain, D.F.; Murray, K.S. Iron(III) Azadiphenolate Compounds in a New Family of Spin Crossover Iron(II)–Iron(III) Mixed-Valent Complexes. Magnetochemistry 2019, 5, 37.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop