Constructing "closed" and "open" {Mn8} clusters

Tziotzi, T. G. ; Mavromagoulos, A. ; Murrie, M. ; Dalgarno, S. J. ; Evangelisti, M. ; Brechin, E. K. ; Milios, C. J.

Resumen: Use of the 1, 3, 5-tri(2-hydroxyethyl)-1, 3, 5-triazacyclohexane ligand, LH3, in manganese chemistry affords access to two structurally related {Mn8} clusters: a "closed" {MnIII6MnII2} puckered square wheel of formula Mn8L2(LH)O3(OH)2(MeO)2Br(imH)(H2O)3](Br)3(1; imH = imidazole) and an "open" {MnIII8} rod of formula MnIII8L2O4(aibH)2(aib)2(MeO)6(MeOH)2](NO3)2(2, aibH = 2-amino-isobutyric acid). In each case the triaza ligands, L/LH, direct the formation of {Mn3} triangles with their N atoms preferentially bonding to the Jahn-Teller axes of the MnIIIions. Subsequent self-assembly is dependent on the anion of the Mn salt and the identity of the organic coligand employed-the terminally bonded imidazole and the chelating/bridging amino acid. The {Mn3} triangles fold up on themselves in 1, forming a wheel. However, the syn, syn-bridging carboxylates in 2 prevent this from happening, instead directing the formation of a linear rod. Magnetic susceptibility and magnetization measurements reveal competing ferro- and antiferromagnetic interactions in both complexes, the exchange being somewhat weaker in 1 due to the presence of MnIIions.

Idioma: Inglés

DOI: 10.1021/acs.cgd.2c00489

Año: 2022

Publicado en: CRYSTAL GROWTH & DESIGN 22, 8 (2022), 4935-4940
ISSN: 1528-7483

Factor impacto JCR: 3.8 (2022)

Categ. JCR: CRYSTALLOGRAPHY rank: 5 / 26 = 0.192 (2022) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 78 / 178 = 0.438 (2022) - Q2 - T2
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 153 / 343 = 0.446 (2022) - Q2 - T2

Factor impacto CITESCORE: 6.7 - Materials Science (Q1) - Chemistry (Q1) - Physics and Astronomy (Q1)

Factor impacto SCIMAGO: 0.705 - Chemistry (miscellaneous) (Q2) - Materials Science (miscellaneous) (Q2) - Condensed Matter Physics (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E11-20R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RTI2018-098537-B-C22

Tipo y forma: Article (Published version)