A comparative study on the deposition of Mn<sub>12</sub>single molecule magnets on the Au(111) surface

Voss, Sönke; Burgert, Michael; Fonin, Mikhail; Groth, Ulrich; Rüdiger, Ulrich

doi:10.1039/b712371j

Cited by 35 publications

(21 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To our knowledge, polynuclear macrocyclic complexes have not been anchored to gold via ambidentate mercaptobenzoate ligands. However, polynuclear Mn 12 complexes have been fixed to gold via perfluorinated mercaptobenzoate linkers [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

Börner¹,

Blömer²,

Kischel³

et al. 2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

The chemisorption of magnetically bistable transition metal complexes on planar surfaces has recently attracted increased scientific interest due to its potential application in various fields, including molecular spintronics. In this work, the synthesis of mixed-ligand complexes of the type [NiII 2L(L’)](ClO4), where L represents a 24-membered macrocyclic hexaazadithiophenolate ligand and L’ is a ω-mercapto-carboxylato ligand (L’ = HS(CH2)5CO2 − (6), HS(CH2)10CO2 − (7), or HS(C6H4)2CO2 − (8)), and their ability to adsorb on gold surfaces is reported. Besides elemental analysis, IR spectroscopy, electrospray ionization mass spectrometry (ESIMS), UV–vis spectroscopy, and X-ray crystallography (for 6 and 7), the compounds were also studied by temperature-dependent magnetic susceptibility measurements (for 7 and 8) and (broken symmetry) density functional theory (DFT) calculations. An S = 2 ground state is demonstrated by temperature-dependent susceptibility and magnetization measurements, achieved by ferromagnetic coupling between the spins of the Ni(II) ions in 7 (J = +22.3 cm−1) and 8 (J = +20.8 cm−1; H = −2JS1S2). The reactivity of complexes 6–8 is reminiscent of that of pure thiolato ligands, which readily chemisorb on Au surfaces as verified by contact angle, atomic force microscopy (AFM) and spectroscopic ellipsometry measurements. The large [Ni2L] tail groups, however, prevent the packing and self-assembly of the hydrocarbon chains. The smaller film thickness of 7 is attributed to the specific coordination mode of the coligand. Results of preliminary transport measurements utilizing rolled-up devices are also reported.

show abstract

Section: Introductionmentioning

confidence: 99%

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

Börner¹,

Blömer²,

Kischel³

et al. 2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…[8,9] The basic structure of [Mn 12 O 12 A C H T U N G T R E N N U N G (O 2 CR) 16 4 ] complexes is sketched in Figure 1. Three main strategies of deposition have been devised to graft Mn 12 -type complexes on gold substrates: [10] direct deposition of suitably-functionalised molecules on native metal surfaces, [11][12][13] deposition of native clusters on pre-functionalised metals, [13][14][15] and pre-functionalization of both partners with Abstract: The deposition of Mn 12 single molecule magnets on gold surfaces was studied for the first time using combined X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) methods at low temperature. The ability of the proposed approach to probe the electronic structure and magnetism of Mn 12 complexes without significant sample damage was successfully checked on bulk samples.…”

Section: Introductionmentioning

confidence: 99%

XAS and XMCD Investigation of Mn₁₂ Monolayers on Gold

Mannini

Sainctavit

Sessoli

et al. 2008

Chemistry A European J

128

133

View full text Add to dashboard Cite

The deposition of Mn(12) single molecule magnets on gold surfaces was studied for the first time using combined X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) methods at low temperature. The ability of the proposed approach to probe the electronic structure and magnetism of Mn(12) complexes without significant sample damage was successfully checked on bulk samples. Detailed information on the oxidation state and magnetic polarization of manganese ions in the adsorbates was obtained from XAS and XMCD spectra, respectively. Partial reduction of metal ions to Mn(II) was clearly observed upon deposition on Au(111) of two different Mn(12) derivatives bearing 16-acetylthio-hexadecanoate and 4-(methylthio)benzoate ligands. The average oxidation state, as well as the relative proportions of Mn(II), Mn(III) and Mn(IV) species, are strongly influenced by the deposition protocol. Furthermore, the local magnetic polarizations are significantly decreased as compared with bulk Mn(12) samples. The results highlight an utmost redox instability of Mn(12) complexes at gold surfaces, presumably accompanied by structural rearrangements, which cannot be easily revealed by standard surface analysis based on X-ray photoelectron spectroscopy and scanning tunnelling microscopy.

show abstract

“…As shown in Fig. 6.6, one approach is to pre-functionalize the Au surface using the ligands with both thiol and carboxylic groups which allows the substitution with the peripheral moieties of Mn 12 on the surface, while the other one is to tailor the Mn 12 peripheral groups to thiol or thioether groups which will [8,23]. Therefore, the subsequent STM investigations demonstrate the formation of a submonolayer of SMMs, indicating the validity of the above approaches.…”

Section: Transition Metal Smms On Au Surfacementioning

confidence: 84%

Conclusion and Perspective

Tang

Zhang

2015

Lanthanide Single Molecule Magnets

View full text Add to dashboard Cite

As a new type of lanthanide SMMs, the novel endohedral metallofullerene (EMF) SMMs are introduced in the first part of this chapter. Furthermore, a survey of the organization of SMMs on surfaces and molecular spintronics is provided with an emphasis focusing on the applications of double-decker phthalocyanine lanthanide SMMs in spintronics. Herein, [LnPc 2 ] SMMs were not only used to fabricate three-terminal spin transistor, but its combination with carbon-based nanostructures leaded to the successful design of supramolecular spin valve. Remarkably, the nuclear spin of Tb atom embedded in [TbPc 2 ] SMM can be read out electronically through detecting the conductance jump, indicating the great promise of lanthanide SMMs in future applications.Keywords Endohedral metallofullerene · Au surface · Molecular spintronics · Spin transistor · Spin valve · Nuclear spin Naturally, the ultimate goal of SMM research is to develop future devices for possible applications in information storage and quantum computing. Therefore, now considerable efforts in some research groups have been devoted to the anchoring and organization of SMMs on surfaces as well as the design of molecular spintronics using SMMs. In contrast to traditional magnetic nanoparticles, the magnetic molecular clusters possess a well-defined structure and behave like perfectly monodisperse nanomagnets, which allow us to design a target molecule-based device. Nevertheless, one critical problem is the poor stability against water and temperature for most reported SMMs, especially lanthanide SMMs, and thus developing new type of SMM family is still necessary to obtain feasible SMMs with structural and magnetic stability when anchoring them on surfaces. Undoubtedly, a new era of collaborative research has been starting among synthetic chemists, physicists, and theorists [1]. This chapter will be devoted to this aspect.

show abstract

A comparative study on the deposition of Mn₁₂single molecule magnets on the Au(111) surface

Cited by 35 publications

References 29 publications

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

XAS and XMCD Investigation of Mn₁₂ Monolayers on Gold

Conclusion and Perspective

Contact Info

Product

Resources

About

A comparative study on the deposition of Mn12single molecule magnets on the Au(111) surface

Cited by 35 publications

References 29 publications

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

XAS and XMCD Investigation of Mn12 Monolayers on Gold

Conclusion and Perspective

Contact Info

Product

Resources

About

A comparative study on the deposition of Mn₁₂single molecule magnets on the Au(111) surface

XAS and XMCD Investigation of Mn₁₂ Monolayers on Gold