Synthesis and investigation of mono- and multinuclear molecular coordination compounds with physical and chemical induced electronic multistability

具有物理和化学诱导电子多稳定性的单核和多核分子配位化合物的合成和研究

• 批准号: 5369704
• 负责人: Professor Dr. Franz Renz
• 金额: --
• 依托单位: Institut für Anorganische Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5369704?language=en
• 关键词: Synthesis; investigation; mono; multinuclear; molecular

Synthesis and investigation of mono and multinuclear molecular coordination compounds, which can be trapped in various electronic states (accessing unprecedented high-spin transitions, e.g. S = 6 to S größer gleich 8, or S = 5/2 to S = 10/2). This electronic multistability is physically (light, p, T) or chemically (solvates, etc.) induced and physically investigated (4 - 400 K; excited in UV-VIS and IR region via T and lasers: diodes, Ar+-ion, Ti-sapphir) monitored microscopically by Mössbauer spectroscopy and UV/VIS/NIR electron spectra and macroscopically by SQUID magnetometer. Molecular switches (synthons) are combined to molecular coordination compounds expecting synergistic interplays between molecular effects with magnetic responses. Used types of synthons compounds: (1) nitro-metal complex (metal-to-ligand charge transfer; e.g. nitroprussiat, Na2[Fe(CN)5NO]2H2O, light interconverts between ground state and two long lived metastable exited states), (2) metal complex with light induced isomerism (ligand isomerisation with change of spin state; e.g. cis-trans), (3) metal-to-metal charge transfer (e.g. cobalt-iron cyanides), and (4) metal-centered excitation (e.g. iron(II) compounds). Such multistable compounds are under consideration for technical application as high density storage, as adaptive materials, in displays, towards nanoscopic machines and serve as model to explore biological processes.

单核和多核分子配位化合物的合成和研究，它们可以被捕获在各种电子态(经历前所未有的高自旋跃迁，例如S=6到S Gröer gleich 8，或S=5/2到S=10/2)。这种电子多稳定性是物理的(光、p、T)或化学的(溶剂等)。通过穆斯堡尔谱、UV/VIS/NIR电子光谱和SQUID磁强计进行微观监测和物理研究(4-400K；通过T和激光：二极管、Ar+离子、钛蓝宝石在UV-Vis和IR区激发)。分子开关(合成子)被结合到分子配位化合物中，期望在分子效应和磁响应之间产生协同作用。使用的合成子化合物类型：(1)硝基金属络合物(金属到配体的电荷转移，例如亚硝基，Na2[Fe(CN)5NO]2H2O，光在基态和两个长寿命的亚稳激发态之间的相互转换)，(2)具有光诱导异构化的金属络合物(随着自旋态的变化，配体异构化，例如顺-反)，(3)金属到金属的电荷转移(例如钴-铁氰化物)，以及(4)以金属为中心的激发(例如铁(II)化合物)。这种多稳定化合物正在考虑作为高密度存储的技术应用，作为适应性材料，在显示器中，向纳米机器发展，并作为探索生物过程的模型。

项目成果

Molecular switching in iron complexes bridged via tin-cyanides observed by Mössbauer and ESR spectroscopy

通过穆斯堡尔和 ESR 光谱观察到通过锡氰化物桥接的铁配合物中的分子转换

• DOI: 10.1088/1742-6596/217/1/012027
• 发表时间: 2010
• 期刊: Journal of Physics: Conference Series
• 作者: Stefan Jung;Franz Renz;Michael Klein;Michael Menzel;Roman Boča;R Stößer
• 通讯作者: R Stößer

Competing redox reactions in Fe-containing AlO(OH) and Al2O3 matrices: A combined investigation by Mössbauer, ESR spectroscopy and thermal analysis

含 Fe AlO(OH) 和 Al2O3 基质中的竞争氧化还原反应：穆斯堡尔、ESR 光谱和热分析的联合研究

• DOI: 10.1088/1742-6596/217/1/012028
• 发表时间: 2010
• 期刊: Journal of Physics: Conference Series
• 作者: R. Stößer;M. Menzel;M. Feist;M. Nofz;F. Renz
• 通讯作者: F. Renz

Metallosupramolecular coordination polyelectrolytes investigated by Mössbauer spectroscopy

穆斯堡尔光谱研究金属超分子配位聚电解质

• DOI: 10.1007/s10751-006-9309-2
• 发表时间: 2005
• 期刊: Hyperfine Interactions
• 作者: A. Lindner;M. Mentzel;F. Renz;D.G. Kurth;A. Thünemann
• 通讯作者: A. Thünemann

Unconventional Spin Crossover in Dinuclear and Trinuclear Iron(III) Complexes with Cyanido and Metallacyanido Bridges

• DOI: 10.1002/ejic.200900169
• 发表时间: 2009-07
• 期刊: European Journal of Inorganic Chemistry
• 影响因子: 2.3
• 作者: Ivan Šalitroš;R. Boča;L. Dlháň;M. Gembicky;J. Kožíšek;J. Linares;J. Moncol’;Ivan Nemec;L. Perašínová;F. Renz;I. Svoboda,;H. Fuess,

High-spin Schiff-base dinuclear iron(III) complexes bridged by N-oxide ligands

• DOI: 10.1016/j.ica.2009.06.057
• 发表时间: 2009-10
• 期刊: Inorganica Chimica Acta
• 影响因子: 2.8
• 作者: Ivan Nemec;R. Boča;M. Gembicky;L. Dlháň;R. Herchel;F. Renz