One-Dimensional End-To-End Azide-Bridged Mn-III Complexes Incorporating Alkali Metal Ions: Slow Magnetic Relaxations and Metamagnetism
- Authors
- Yoon, Jung Hee; Lee, Jin Wuk; Ryu, Dae Won; Yoon, Sung Won; Suh, Byoung Jin; Kim, Hyoung Chan; Hong, Chang Seop
- Issue Date
- 3월-2011
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- azides; crystal engineering; magnetic properties; manganese; single-chain magnets
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.17, no.10, pp.3028 - 3034
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 17
- Number
- 10
- Start Page
- 3028
- End Page
- 3034
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112972
- DOI
- 10.1002/chem.201002269
- ISSN
- 0947-6539
- Abstract
- 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.
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