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Structural Investigation of the High Spin - Low Spin Relaxation Dynamics of the Porous Coordination Network [Fe(pz)Pt(CN)(4)]center dot 2.6H(2)O

机译:[Fe(pz)Pt(CN)(4)]中心点2.6H(2)O的高自旋->低自旋弛豫动力学的结构研究

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摘要

The Hoffman-type coordination compound [Fe(pz)Pt(CN)(4)]2.6H(2)O (pz=pyrazine) shows a cooperative thermal spin transition at around 270K. Synchrotron powder X-Ray diffraction studies reveal that a quantitative photoinduced conversion from the low-spin (LS) state into the high-spin (HS) state, based on the light-induced excited spin-state trapping effect, can be achieved at 10K in a microcrystalline powder. Time-resolved measurements evidence that the HSLS relaxation proceeds by a two-step mechanism: a random HSLS conversion at the beginning of the relaxation is followed by a nucleation and growth process, which proceeds until a quantitative HSLS transformation has been reached.
机译:霍夫曼型配位化合物[Fe(pz)Pt(CN)(4)] 2.6H(2)O(pz =吡嗪)在270K左右表现出协同的热自旋转变。同步加速器粉末X射线衍射研究表明,基于光诱导的激发自旋态俘获效应,可以实现从低自旋(LS)态到高自旋(HS)态的定量光诱导转化。在微晶粉末中。时间分辨的测量结果表明,HSLS松弛是通过两步机制进行的:在松弛开始时随机进行HSLS转换,然后进行成核和生长过程,直到达到定量HSLS转换为止。

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