Structural and magnetic characterisation of Ce@C82

被引：15

作者：

Nuttall, CJ ^{[1
]}

Inada, Y

Watanabe, Y

Nagai, K

Muro, T

Chi, DH

Takenobu, T

Iwasa, Y

Kikuchi, K

机构：

[1] Japan Adv Inst Sci & Text, Tatsunokuchi, Ishikawa 9231292, Japan

[2] Tokyo Metropolitan Univ, Tokyo 1920397, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2000年 / 340卷

关键词：

endohedral metallofullerene; Ce@C-82; polymorphism; magnetism;

D O I：

10.1080/10587250008025538

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the structural and magnetic properties of the endohedral metallofullerene Ce@C-82. A hexagonal close packing phase [P6(3)/mmc [a = 11.1544 Angstrom, c = 18.2256 Angstrom] is formed exclusively after vacuum annealing of the solvent precipitated compound. In contrast, sublimed Ce@C82 was found to be dominantly face-centred cubic close packed [Fm-3m; a = 15.7668 Angstrom]. X-ray powder profile calculations revealed that the endohedral cerium atom lies close to 1.8 Angstrom, from the C-82 cage centre in both phases. Hexagonal Ce@C-82 has been investigated by magnetic susceptibility measurements. Paramagnetic behaviour is maintained down to 2K attributable to Ce3+ ions. Towards lower temperatures, the observed paramagnetic moment falls from the free ion Ce3+(mu(eff) = 2.54 mu B) value, monotonically approaching 1 mu B at 2K.

引用

页码：635 / 638

页数：4

共 4 条

[1]

IWASA Y, 1999, UNPUB

[2] ISOLATION AND CHARACTERIZATION OF THE METALLOFULLERENE LAC82 [J].

KIKUCHI, K ;

SUZUKI, S ;

NAKAO, Y ;

NAKAHARA, N ;

WAKABAYASHI, T ;

SHIROMARU, H ;

SAITO, K ;

IKEMOTO, I ;

ACHIBA, Y .

CHEMICAL PHYSICS LETTERS, 1993, 216 (1-2) :67-71

[3] MASS SPECTROSCOPIC AND ESR CHARACTERIZATION OF SOLUBLE YTTRIUM-CONTAINING METALLOFULLERENES YC82 AND Y2C82 [J].

SHINOHARA, H ;

SATO, H ;

SAITO, Y ;

OHKOHCHI, M ;

ANDO, Y .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (09) :3571-3573

[4]

YVON K, UNPUB

← 1 →