Soft chemical control to achieve new layered architectures and strongly correlated states.

软化学控制以实现新的分层结构和强相关状态。

• 批准号: EP/P018874/1
• 负责人: Simon Clarke
• 金额: $ 70.89万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP018874%2F1
• 关键词: Soft; chemical; control; achieve; new

Solid state chemistry involves the synthesis of (normally) crystalline solids (compounds resembling minerals) and optimisation of their compositions so as to realise particular physical or chemical properties, such as conductivity or magnetism. Often these compounds are synthesised at high temperatures so that the ionic mobility is high enough for the reactions to proceed. Under this thermodynamic control of the synthesis the range of compositions available for a particular combination of elements may be limited. So complementary low temperature (e.g. at room temperature, or even below) syntheses are another way of changing the chemical composition and this may enable a wider range of chemical compositions to be attained. The low temperature chemistry, normally an intercalation or a deintercalation, is possible if the compound supports high mobility of some of its constituent ions. The work proposed here starts from the demonstration that deintercalation chemistry of a series of layered transition metal compounds is possible and does have profound effects on the electronic properties. The targets are compounds where compositional tuning may be carried out continuously and over a wide compositional range. The transition metals in these compounds and the two-dimensional crystal structures have been chosen so as to yield strongly-correlated-electron systems where the electronic behaviour is not easy to predict due to several competing factors, and where unusual electronic phenomena, such as superconductivity, magnetoresistance, high thermoelectric power and metal-to-insulator transitions are often found. In addition to producing new compositions, we will explore ways in which the chemistry can be applied to large crystals of the compounds in order to give better insight into their microscopic properties.

固态化学涉及(通常)结晶固体(类似矿物的化合物)的合成和其组成的优化，以实现特定的物理或化学性质，如导电性或磁性。通常这些化合物是在高温下合成的，因此离子迁移率足够高，足以使反应继续进行。在这种合成的热力学控制下，可用于特定元素组合的组合物的范围可能是有限的。因此，补充低温(例如，在室温下，甚至更低)合成是改变化学成分的另一种方式，这可能使获得更广泛的化学成分。如果化合物支持其某些组成离子的高流动性，那么低温化学，通常是插层或脱插层是可能的。本文提出的工作从论证一系列层状过渡金属化合物的脱嵌化学是可能的，并且确实对电子性质有深刻的影响开始。这些靶标是可以在很宽的组成范围内连续进行组成调整的化合物。选择这些化合物中的过渡金属和二维晶体结构是为了产生强关联电子系统，其中电子行为由于几个竞争因素而不容易预测，并且经常发现不寻常的电子现象，如超导、磁阻、高热电功率和金属到绝缘体的转变。除了生产新的组合物外，我们还将探索将化学应用于化合物的大晶体的方法，以便更好地了解它们的微观性质。

项目成果

Topochemical intercalation reactions of ZrSe3

• DOI: 10.1016/j.jssc.2022.123436
• 发表时间: 2022-07
• 期刊: Journal of Solid State Chemistry
• 影响因子: 3.3
• 作者: M. Elgaml;S. Cassidy;S. Clarke

Muon spin rotation study of the layered oxyselenide Sr 2 CoO 2 Ag 2 Se 2

层状氧硒化物Sr 2 CoO 2 Ag 2 Se 2 的μ子自旋旋转研究

• DOI: 10.1103/physrevb.106.224410
• 发表时间: 2022
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Gill G

Structural Evolution of Layered Manganese Oxysulfides during Reversible Electrochemical Lithium Insertion and Copper Extrusion.

• DOI: 10.1021/acs.chemmater.1c00375
• 发表时间: 2021-06-08
• 期刊: Chemistry of materials : a publication of the American Chemical Society
• 作者: Dey S;Zeng D;Adamson P;Cabana J;Indris S;Lu J;Clarke SJ;Grey CP
• 通讯作者: Grey CP

Complex Magnetic Ordering in the Oxide Selenide Sr2Fe3Se2O3.

• DOI: 10.1021/acs.inorgchem.8b01542
• 发表时间: 2018-07
• 期刊: Inorganic chemistry
• 影响因子: 4.6
• 作者: S. Cassidy;F. Orlandi;P. Manuel;J. Hadermann;A. Scrimshire;P. Bingham;S. Clarke