Site-specific anchoring of tetrairon(III) single molecule magnets on functionalized Si(100) surfaces

被引：42

作者：

Condorelli, Guglielmo G. ^{[1
]}

Motta, Alessandro ^{[1
]}

Pellegrino, Giovanna ^{[1
]}

Cornia, Andrea ^{[2
,3
]}

Gorini, Lapo ^{[4
,5
]}

Fragala, Lnazio L. ^{[1
]}

Sangregorio, Claudio ^{[4
,5
]}

Sorace, Lorenzo ^{[4
,5
]}

机构：

[1] INSTM UdR Catania, I-95125 Catania, Italy

[2] Univ Modena & Reggio Emilia, Dept Chem, I-41100 Modena, Italy

[3] INSTM UdR Modena, I-41100 Modena, Italy

[4] Univ Florence, Dept Chem, I-50019 Sesto Fiorentino, Italy

[5] INSTM UdR Florence, I-50019 Sesto Fiorentino, Italy

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 06期

关键词：

D O I：

10.1021/cm703561c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The site-specific reaction of tetrairon(III) propeller-like clusters,with tripodal ligands derived from 2-hydroxymethyl-propane-1,3-diol was investigated as a route to graft these single molecule magnets (SMMs) on Si(100). A silicon surface prefunctionalized with a long-chain trimethylol derivative was reacted with [Fe-4(OMe)(6)(tmhd)(6)] (1) and [Fe-4(L)(2)(tmhd)(6)] (2), and the reaction course was followed by X-ray photoelectron spectroscopy (XPS), attenuated total reflection-infrared spectroscopy, and atomic force microscopy (Htmhd = 2,2,6,6-tetramethylheptane-3,5-dione, H3L = 2-(4-chloro-phenyl)-2-hydroxymethyl-propane-1,3-diol). Chlorine-marked complex 2 was specifically designed to monitor the ligand-exchange reaction by XPS. This technique showed that the amount of Fe at the surface closely parallels the surface concentration of tripodal receptors. For low receptor concentrations the Cl/Fe atomic ratio is halved as compared with solid 2, as expected for intact molecules linked to the surface via one receptor only. For high receptor concentrations, the Cl/Fe ratio drops to zero, as expected for a complete replacement of L3- ligands by surface-bound receptors.

引用

页码：2405 / 2411

页数：7

共 30 条

[1] Tuning anisotropy barriers in a family of tetrairon(III) single-molecule magnets with an S=5 ground state [J].