Anchoring of Rare-Earth-Based Single-Molecule Magnets on Single-Walled Carbon Nanotubes

被引：149

作者：

Kyatskaya, Svetlana ^{[3
]}

Ramon Galan-Mascaros, Jose ^{[4
]}

Bogani, Lapo ^{[1
,2
,5
]}

Hennrich, Frank ^{[3
]}

Kappes, Manfred ^{[3
]}

Wernsdorfer, Wolfgang ^{[1
,2
]}

Ruben, Mario ^{[3
]}

机构：

[1] Inst Neel, F-38042 Grenoble, France

[2] Univ Grenoble 1, CNRS, F-38042 Grenoble, France

[3] KIT, Inst Nanotechnol, D-76021 Karlsruhe, Germany

[4] Inst Chem Res Catalonia ICIQ, E-43007 Tarragona, Spain

[5] Univ Stuttgart, Inst Phys 1, D-70550 Stuttgart, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 42期

关键词：

ELECTRONIC-STRUCTURE; MAGNETIZATION; BIS(PHTHALOCYANINATO)TERBIUM; SPINTRONICS; RELAXATION; COMPLEXES; PYRENE;

D O I：

10.1021/ja906165e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new heteroleptic bis(phthalocyaninato)terbium(III) complex 1, bearing a pyrenyl group, exhibits temperature and frequency dependence of ac magnetic susceptibility, typical of single-molecule magnets. The complex was successfully attached to single-walled carbon nanotubes (SWNTs) using pi-pi interactions, yielding a 1-SWNT conjugate. The supramolecular grafting of 1 to SWNTs was proven qualitatively and quantitatively by high-resolution transmission electron microscopy, emission spectroscopy, and atomic force spectroscopy. Giving a clear magnetic fingerprint, the anisotropy energy barrier and the magnetic relaxation time of the 1-SWNT conjugate are both increased in comparison with the pure crystalline compound 1, likely due to the suppression of intermolecular interactions. The obtained results propose the 1-SWNT conjugate as a promising constituent unit in magnetic single-molecule measurements using molecular spintronics devices.

引用

页码：15143 / 15151

页数：9

共 58 条

[51] Significant increase of the barrier energy for magnetization reversal of a single-4f-ionic single-molecule magnet by a longitudinal contraction of the coordination space [J].