Krzton-Maziopa Anna, Pesko Edyta, Puzniak Roman
Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, PL-00-664 Warsaw, Poland.
J Phys Condens Matter. 2018 Jun 20;30(24):243001. doi: 10.1088/1361-648X/aabeb5. Epub 2018 Apr 17.
Layered iron-based superconducting chalcogenides intercalated with molecular species are the subject of intensive studies, especially in the field of solid state chemistry and condensed matter physics, because of their intriguing chemistry and tunable electric and magnetic properties. Considerable progress in the research, revealing superconducting inorganic-organic hybrid materials with transition temperatures to superconducting state, T , up to 46 K, has been brought in recent years. These novel materials are synthesized by low-temperature intercalation of molecular species, such as solvates of alkali metals and nitrogen-containing donor compounds, into layered FeSe-type structure. Both the chemical nature as well as orientation of organic molecules between the layers of inorganic host, play an important role in structural modifications and may be used for fine tuning of superconducting properties. Furthermore, a variety of donor species compatible with alkali metals, as well as the possibility of doping also in the host structure (either on Fe or Se sites), makes this system quite flexible and gives a vast array of new materials with tunable electric and magnetic properties. In this review, the main aspects of intercalation chemistry are discussed with a particular attention paid to the influence of the unique nature of intercalating species on the crystal structure and physical properties of the hybrid inorganic-organic materials. To get a full picture of these materials, a comprehensive description of the most effective chemical and electrochemical methods, utilized for synthesis of intercalated species, with critical evaluation of their strong and weak points, related to feasibility of synthesis, phase purity, crystal size and morphology of final products, is included as well.
插入分子物种的层状铁基超导硫族化合物是深入研究的对象，特别是在固态化学和凝聚态物理领域，因为它们具有引人入胜的化学性质以及可调节的电学和磁学性质。近年来，该研究取得了显著进展，揭示了转变温度高达46K的超导无机 - 有机杂化材料。这些新型材料是通过将分子物种（如碱金属的溶剂化物和含氮给体化合物）低温插入层状FeSe型结构中合成的。无机主体层间有机分子的化学性质和取向在结构修饰中都起着重要作用，并且可用于微调超导性质。此外，与碱金属兼容的各种给体物种以及在主体结构（Fe或Se位点上）进行掺杂的可能性，使得该体系相当灵活，并产生了大量具有可调节电学和磁学性质的新材料。在这篇综述中，讨论了插入化学的主要方面，特别关注插入物种的独特性质对无机 - 有机杂化材料晶体结构和物理性质的影响。为了全面了解这些材料，还包括了对用于合成插入物种的最有效化学和电化学方法的全面描述，并对其优缺点进行了批判性评估，这些优缺点与合成的可行性、相纯度、最终产物的晶体尺寸和形态有关。
