-
- 中野 元裕
- 大阪大学 大学院工学研究科
書誌事項
- タイトル別名
-
- Phase Transition Behavior of a Manganese(III) Spin-Crossover Complex Examined through Dielectric and Magnetic Responses
- ユウデン オウトウ ト ジバ オウトウ デ ミタ マンガン(Ⅲ)スピンクロスオーバー サクタイ ノ ソウ テンイ キョドウ
この論文をさがす
抄録
The octahedral manganese(III) complex, [MnIII(taa)] (H3taa = tris(1-(2-azolyl)-2-azabuten-4-yl)amine), has long been known as a rare example of (3d)4 spin-crossover system, having a steep spin-crossover phase transition at Tc = 48 K between a high-spin 5Eg and a low-spin 3T2g states. Since the high-spin state is obviously subject to the Jahn-Teller effect, the electronic states are coupled with lower-symmetry deformation modes lifting 5Eg orbital degeneracy in addition to a symmetrical breathing mode responsible for the spin crossover. This simultaneous involvement of two molecular bistabilities may afford a variety of condensed states (phases) due to competitive or cooperative interactions. The phase diagram and the phase transition behavior were thoroughly explored via several probes, including dielectric measurements, magnetization under pulsed high field, HF-EPR, and magnetic susceptibility measurements using high-pressure clamp cell. All the results were successfully interpreted in a unified fashion based on a four-state Ising-Potts model with mean-field approximation.
収録刊行物
-
- Bulletin of Japan Society of Coordination Chemistry
-
Bulletin of Japan Society of Coordination Chemistry 58 6-19, 2011
錯体化学会