Metastable indium oxyhydroxide (InOOH) and corundum-type indium oxide (In2O3): controllable synthesis, growth of single crystals and in-situ characterization of transformation paths and transient intermediates

与Al2O3和Ga2O3（其他已知的13 （IIIA）族金属氧化物）类似，In2O3直到最近才被认为具有很好的结构化学，没有新发现的空间。在过去的几年里，这种观点已经完全改变了。新的氧化铟晶型的计算和合成以及立方In2O3单晶的生长为无机化学和材料科学开辟了新的前景。尽管近年来取得了一些进展，但人们对in - o和In2O3- h2o体系还没有完全了解，特别是在亚稳氧化铟（InOOH）和In2O3多晶物的可调合成、晶体学关系和性质方面。该项目侧重于(i)亚稳o-InOOH和刚玉型（rh-） In2O3的可控合成路线，（ii）亚稳o-InOOH和rh-In2O3单晶的生长，（iii）从氢氧化铟和氢氧化氧到亚稳In2O3多晶的晶体学转变路径的理解，（iv） in- o和In2O3- h2o体系相变的原位表征，以及(v)瞬态中间体的鉴定。

Similar to Al2O3 and Ga2O3 - other well-known oxides of the group 13 (IIIA) metals - In2O3 has been considered until recently to possess the well understood structural chemistry with no space for new discoveries. In the past few years this point of view has changed completely. Computation and synthesis of new indium oxide polymorphs and growth of single crystals of cubic In2O3 have opened new perspectives for inorganic chemistry and materials science. Despite the progress achieved in the last years, the In-O and In2O3-H2O systems are not fully understood, especially in respect to the tunable synthesis, crystallographic relationship and properties of metastable indium oxyhydroxide (InOOH) and In2O3 polymorphs. The project focuses on (i) controllable synthesis routes towards metastable o-InOOH and corundum-type (rh-) In2O3, (ii) growth of single crystals of metastable o-InOOH and rh-In2O3, (iii) understanding of crystallographic transformation path from indium hydroxide and oxyhydroxide to metastable In2O3 polymorphs, (iv) in-situ characterization of the phase transformations in the In-O and In2O3-H2O systems and (v) identification of transient intermediates.