Structure and formation dynamics of the photo-induced phase transition in Fe spincrossover complexes
Fe自旋交叉配合物中光致相变的结构和形成动力学
基本信息
- 批准号:14340092
- 负责人:
- 金额:$ 8.9万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Photo-induced phase transition(PIPT) is quite attractive phenomenon for non-equilibrium physics. Novel self-organized structure is expected in a system far from thermal equilibrium. In this project, we focued on the photo-induced spin-crossover transition and explored the structure of the photo-induced macroscopic phase using Raman scattering, infrared absorption, EXAFS, and X-ray diffraction techniques. In Fe-pic. complexes, large difference was found between thermally and light-induced high-spin states only in the Raman scattering experiments, whereas the EXAFS and X-ray diffraction revealed that the bond-lengths and long range order in the photo-induced phase are quite similar to those in the high temperature high spin phase. Possibility of the symmetry lowering was discussed. In addition, we measured photo-induced phenomena and found a spin-selective PIPT in binuclear spin-crossover complex, [Fe(bt)(NCS)_2]_2(bpym) that shows two step thermal phase transition via an intermediate state. The Raman scattering and infrared absorption are measured and discussed with a phenomenological model. A Terahertz spectrometer that is combined with ATR technique was developed to measure a hydrogen bonging in the spin-crossover complexes.
光致相变(PIPT)是非平衡物理中一个非常引人注目的现象。在远离热平衡的体系中,人们期待着新的自组织结构。在本计画中,我们以光致自旋交叉跃迁为研究对象,利用拉曼散射、红外吸收、EXAFS及X光绕射等技术,探讨光致宏观相的结构。在菲皮克。配合物中,只有在拉曼散射实验中发现热诱导态和光诱导态的高自旋态有较大的差异,而EXAFS和X射线衍射表明光诱导态的键长和长程有序度与高温高自旋态的键长和长程有序度非常相似。讨论了对称性降低的可能性。此外,我们还测量了双核自旋交叉配合物[Fe(bt)(NCS)_2]_2(bpym)的光诱导PIPT现象,发现了一个自旋选择性PIPT,它通过一个中间态发生两步热相变。测量了样品的拉曼散射和红外吸收,并用唯象模型进行了讨论。开发了与ATR技术相结合的太赫兹光谱仪来测量自旋交叉复合物中的氢键合。
项目成果
期刊论文数量(65)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Selective photoswitching of the binuclear spin crossover compound [Fe(bt)(NCS) 2]2(bpm) into two distinct macroscopic phases
双核自旋交叉化合物 [Fe(bt)(NCS) 2]2(bpm) 选择性光转换为两个不同的宏观相
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:N.Ould Moussa;S.Mouri;K.Tanaka;et al.
- 通讯作者:et al.
K.Takahashi, M.Kamada, Y.Fukui, K.Fukui, T.Tayagaki, K.Tanaka: "Photoindueced phase transition of a spin-crossover complex studied with the combination of SR and laser"Surface Review and Letters 319(2002). 9. 319-322 (2002)
K.Takahashi、M.Kamada、Y.Fukui、K.Fukui、T.Tayagaki、K.Tanaka:“结合 SR 和激光研究的自旋交叉复合物的光诱导相变”Surface Review and Letters 319(2002 年)
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Hirouiki Ohyanagi, Takeshi Tayagaki, Koichiro Tanaka: "Photo-induced phase transitions probed by X-ray absorption spectroscopy : Fe(II) spin crossover complex"Journal of Physics and Chemistry of Solids. (in press). (2004)
Hirouiki Ohyanagi、Takeshi Tayagaki、Koichiro Tanaka:“通过 X 射线吸收光谱探测光诱导相变:Fe(II) 自旋交叉复合物”固体物理与化学杂志。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Pulsedd-SR study of spin-solitons as a probe of Neutral-Ionic phase transition of TTF-CA single crystal
自旋孤子的 Pulsedd-SR 研究作为 TTF-CA 单晶中性离子相变的探针
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:C.Itoh;M.Shirai;K.Tanaka;K.Kan'no
- 通讯作者:K.Kan'no
Modification of vibrational selection rules in the photoinduced spin-crossover phase
光诱导自旋交叉阶段振动选择规则的修改
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Takeshi Tayagaki;Koichiro Tanaka;Hidekazu Okamura
- 通讯作者:Hidekazu Okamura
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TANAKA Koichiro其他文献
TANAKA Koichiro的其他文献
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{{ truncateString('TANAKA Koichiro', 18)}}的其他基金
Study on the pathogenesis of functional dyspepsia caused by stress and development of imaging biomarkers
应激所致功能性消化不良发病机制及影像生物标志物的研究
- 批准号:
17K09362 - 财政年份:2017
- 资助金额:
$ 8.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
A Study of Canon of Solidarity with the Inclusion of Severe Learning Disabilities
纳入严重学习障碍的团结准则研究
- 批准号:
22653065 - 财政年份:2010
- 资助金额:
$ 8.9万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Exploitation of Organic Electronic Materials of Potential Dynamic Switches for Non-equilibrium Condensed Matter Sciences
非平衡凝聚态科学潜在动态开关有机电子材料的开发
- 批准号:
18GS0208 - 财政年份:2006
- 资助金额:
$ 8.9万 - 项目类别:
Grant-in-Aid for Creative Scientific Research
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