Propeller-like [Fe(L)(dk)] complexes, in which Hdk is a beta-diketone and HL is a tripodal alcohol, R-C(CHOH), exhibit tunable magnetic anisotropy barriers and retain their magnetic memory effect when chemically anchored on metal surfaces. Heteronuclear analogues of these M complexes have been sought to afford a library of compounds with different total spin (S) values, but synthetic efforts described so far gave solid solutions containing M in addition to the desired MM' species. We now present a novel synthetic route to MM' complexes featuring a central chromium(iii) ion. The three-step preparation goes through coordination of Cr by two equivalents of tripodal alkoxide (R = Et and Ph), followed by reaction of this complex "core" with the peripheral +III metal ions. Products have been characterised by chemical analyses together with H-NMR, FTIR, W-band EPR, DC/AC magnetic susceptibility measurements and single crystal X-ray diffractometry. Due to the chemical inertness of Cr, this route yields 100% pure FeCr complexes without metal scrambling; what is more, it is suitable for designing novel heteronuclear single molecule magnets (SMMs) with a variety of d- and f-metals and R groups.

A new approach to the synthesis of heteronuclear propeller-like single molecule magnets / Pasquale Totaro;Kátia Cristina M. Westrup;Marie-Emmanuelle Boulon;Giovana G. Nunes;Davi F. Back;Andersson Barison;Samuele Ciattini;Matteo Mannini;Lorenzo Sorace;Jaísa F. Soares;Andrea Cornia;Roberta Sessoli. - In: DALTON TRANSACTIONS. - ISSN 1477-9226. - STAMPA. - 42:(2013), pp. 4416-4426. [10.1039/c2dt32618c]

A new approach to the synthesis of heteronuclear propeller-like single molecule magnets

TOTARO, PASQUALE;CIATTINI, SAMUELE;MANNINI, MATTEO;SORACE, LORENZO;SESSOLI, ROBERTA
2013

Abstract

Propeller-like [Fe(L)(dk)] complexes, in which Hdk is a beta-diketone and HL is a tripodal alcohol, R-C(CHOH), exhibit tunable magnetic anisotropy barriers and retain their magnetic memory effect when chemically anchored on metal surfaces. Heteronuclear analogues of these M complexes have been sought to afford a library of compounds with different total spin (S) values, but synthetic efforts described so far gave solid solutions containing M in addition to the desired MM' species. We now present a novel synthetic route to MM' complexes featuring a central chromium(iii) ion. The three-step preparation goes through coordination of Cr by two equivalents of tripodal alkoxide (R = Et and Ph), followed by reaction of this complex "core" with the peripheral +III metal ions. Products have been characterised by chemical analyses together with H-NMR, FTIR, W-band EPR, DC/AC magnetic susceptibility measurements and single crystal X-ray diffractometry. Due to the chemical inertness of Cr, this route yields 100% pure FeCr complexes without metal scrambling; what is more, it is suitable for designing novel heteronuclear single molecule magnets (SMMs) with a variety of d- and f-metals and R groups.
42
4416
4426
Pasquale Totaro;Kátia Cristina M. Westrup;Marie-Emmanuelle Boulon;Giovana G. Nunes;Davi F. Back;Andersson Barison;Samuele Ciattini;Matteo Mannini;Lorenzo Sorace;Jaísa F. Soares;Andrea Cornia;Roberta Sessoli
File in questo prodotto:
File Dimensione Formato  
DT_2013.pdf

Accesso chiuso

Tipologia: Versione finale referata (Postprint, Accepted manuscript)
Licenza: DRM non definito
Dimensione 1.15 MB
Formato Adobe PDF
1.15 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/796456
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 23
social impact