One-Dimensional End-To-End Azide-Bridged MnIII Complexes Incorporating Alkali Metal Ions: Slow Magnetic Relaxations and Metamagnetism

被引：53

作者：

Yoon, Jung Hee ^{[1
]}

Lee, Jin Wuk ^{[1
]}

Ryu, Dae Won ^{[1
]}

Yoon, Sung Won ^{[2
]}

Suh, Byoung Jin ^{[2
]}

Kim, Hyoung Chan ^{[3
]}

Hong, Chang Seop ^{[1
]}

机构：

[1] Korea Univ, Dept Chem, Seoul 136713, South Korea

[2] Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea

[3] Natl Fus Res Inst, Taejon 305333, South Korea

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2011年 / 17卷 / 10期

关键词：

azides; crystal engineering; magnetic properties; manganese; single-chain magnets; SINGLE-CHAIN MAGNETS; CRYSTAL-STRUCTURES; CO(II) CHAIN; CO; BEHAVIOR; FE; 1D; NI; TRANSITION; POLYMERS;

D O I：

10.1002/chem.201002269

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Three azide-bridged Mn-III chains [Mn(3-MeOsalpn)(N-3)]center dot 0.5AClO(4) (A = Na (1), K (2), Rb (3); 3-MeOsalpn = N,N'-propylenebis(3-methoxysalicylideneiminato) dianion) incorporating alkali metal ions and perchlorate anions were systematically synthesized. The overall structure can be described as a one-dimensional chain bridged by end-to-end azide ligands, although spatial arrangements of Jahn-Teller axes of Mn in 1 and 2 are different from that in 3. Relying on the alkali metal ions, magnetic properties are varied from a two-step phase transition (1) to metamagnetic transitions (2 and 3). In this system, spin canting definitely plays a central role in giving rise to the apparent slow magnetic relaxations in 1 and 2 because application of a high external magnetic field tends to destroy single-chain magnet (SCM) properties. Despite the existence of a long-range antiferromagnetic order at T-N, slow magnetic relaxation is notably observed in 2, which likely emanates from the operative spin canting below T-N.

引用

页码：3028 / 3034

页数：7

共 64 条

[1] 1D and 2D end-to-end azide-bridged cobalt(II) complexes: Syntheses, crystal structures, and magnetic properties [J].