http://www.cnr.it/ontology/cnr/individuo/prodotto/ID2851

Grafting derivatives of Mn-6 single-molecule magnets with high anisotropy energy barrier on Au(111) surface (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Grafting derivatives of Mn-6 single-molecule magnets with high anisotropy energy barrier on Au(111) surface (Articolo in rivista) (literal)

Anno

2008-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1021/jp802195x (literal)

Alternative label

Moro, F; Corradini, V; Evangelisti, M; De Renzi, V; Biagi, R; del Pennino, U; Milios, CJ; Jones, LF; Brechin, EK (2008)
Grafting derivatives of Mn-6 single-molecule magnets with high anisotropy energy barrier on Au(111) surface
in The journal of physical chemistry. B; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Moro, F; Corradini, V; Evangelisti, M; De Renzi, V; Biagi, R; del Pennino, U; Milios, CJ; Jones, LF; Brechin, EK (literal)

Pagina inizio

9729 (literal)

Pagina fine

9735 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://pubs.acs.org/doi/full/10.1021/jp802195x (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

112 (literal)

Rivista

?The ?journal of physical chemistry. B (Rivista)

Note

ISI Web of Science (WOS) (literal)
Scopus (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

[Moro, F.; De Renzi, V.; Biagi, R.; del Pennino, U.] Univ Modena & Reggio Emilia, Dipartimento Fis, Modena, Italy; [Moro, F.; Corradini, V.; Evangelisti, M.; De Renzi, V.; Biagi, R.; del Pennino, U.] CNR INFM Natl Ctr NanoStruct & BioSyst Surfaces S, Modena, Italy; [Milios, C. J.; Jones, L. F.; Brechin, E. K.] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland (literal)

Titolo

Grafting derivatives of Mn-6 single-molecule magnets with high anisotropy energy barrier on Au(111) surface (literal)

Abstract

We study the magnetic proper-ties of two new functionalized single-molecule magnets belonging to the Mn-6 family (general formula [(Mn6O2)-O-III(R-sao)(6)(O2C-th)(2)L-4-(6)], where R = H (1) or Et (2), HO2C-th = 3-thiophene carboxylic acid, L = EtOH, H2O and saoH(2) is salicylaldoxime) and their grafting on the Au(111) surface. Complex 1 exhibits spin ground-state S = 4, as the result of ferromagnetic coupling between the two antiferromagnetic Mn-3(III) triangles, while slight structural changes in complex 2, switch the dominant magnetic exchange interactions from anti- to ferromagnetic, enhancing the spin ground-state to S = 12 and, consequently, the effective energy barrier for the relaxation of magnetization. Direct-current and alternating-current magnetic susceptibility measurements show that the functionalized complexes preserve the main magnetic properties of the cot-responding not-functionalized Mn-6 clusters (i.e., total spin value and magnetic behavior as a function of temperature), though a reduction of the anisotropy barrier is observed in complex 2. For both complexes, the -O2C-th functionalization allows the direct grafting on Au(111) surface by liquid-phase deposition. X-ray photoemission spectroscopy demonstrates that the stoichiometry of the molecular cores is preserved after grafting. Scanning tunneling microscopy (STM) reveals a sub-monolayer distribution of isolated clusters with a slightly higher coverage for complex 1. The cluster stability in the STM images and the S-2p energy positions demonstrate, for both derivatives, the strength of the grafting with the gold surface. (literal)

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