Optical switching between bistable phases in rubidium manganese hexacyanoferrate at room temperature
Optical switching between bistable phases in rubidium manganese hexacyanoferrate at room temperature
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DOI：
10.1063/1.1850831
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发表时间：
2005-05
影响因子：
3.2
通讯作者：
H. Tokoro;Tomoyuki Matsuda;K. Hashimoto;S. Ohkoshi
中科院分区：
文献类型：
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作者：
H. Tokoro;Tomoyuki Matsuda;K. Hashimoto;S. Ohkoshi
在室温下，用单脉冲激光（λ= 532 nm，脉宽6 ns）辐照Rb_（0.98）Mn_（1.01）[Fe（CN）_6]·0.2H_2O，观察到Fe（II）（S=0）-CN-Mn（III）（S=2）到Fe（III）（S= 1scin_2）-CN-Mn（II）（S= 5scin_2）的相变。量子产率（Φ）取决于激光功率密度（P），在24 mJcm − 2脉冲−1的情况下，Φ=38。在这种光化学反应中，只有当P值高于6 mJcm − 2 pulse −1（Pth）时，低温相才转变为高温相。采用包含协同作用的平均场模型，对激光功率密度阈值和大Φ值进行了解析分析。
The phase transition from Fe(II)(S=0)–CN–Mn(III)(S=2) to Fe(III)(S=1∕2)–CN–Mn(II)(S=5∕2) in Rb0.98Mn1.01[Fe(CN)6]∙0.2H2O was observed at room temperature with a one-shot-laser-pulse (λ=532nm; pulse width: 6ns) irradiation. The quantum yield (Φ) depended on the laser power density (P) and Φ=38 was achieved with a 24mJcm−2pulse−1. In this photochemical reaction, only when the P value was above 6mJcm−2pulse−1 (Pth), the low-temperature phase was converted to the high-temperature phase. The threshold in laser power density and large Φ value were thermodynamically considered using a mean field model that contains cooperative interaction.