高压下卤素化合物的反常物性

Abnormal Properties of Halogen Compounds under High Pressure

凝聚态物质的基本性质强烈依赖其微观构型及电子结构,而高压可以有效地减小原子间距离,引起物质电子构型的重新排布并改变键合模式,从而使物质以有违传统的物理、化学状态存在,形成常压下无法获得的新结构、新现象和新性质。以第七主族卤素为例,简要介绍卤素化合物在高压下所呈现的反常物理性质。相关研究表明:在高压下卤素化合物呈现出异于常压的价态、配位以及成键方式。这些研究不仅提升了对卤素的基本认识,同时也拓宽了高压物理研究的新视野。

The fundamental properties of condensed matter strongly depend on its microscopic configuration and electronic structure.High pressure can effectively reduce the distance between atoms,result in the rearrangement of electronic configuration and change the bonding mode,so that enabling the matter to exist in unconventional physical and chemical state,forming new structures,new phenomena and new properties that cannot be obtained under ambient pressure.In this paper,taking the main-group halogens as example,the abnormal physical properties of halogen compounds under high pressure are briefly introduced.Related studies have shown that the valence states,coordination,and bonding modes of halogen compounds under high pressure are different from those under ambient pressure.These studies not only enhance the basic understanding of halogen,but also broaden the view of high-pressure physics.