Zhao Wenli, Li Lili, Han Tao, Jiao Jinmiao, She Yuheng, Ye Ning, Hu Zhanggui, Wu Yicheng, Li Conggang
Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.
Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Inorg Chem. 2022 Jun 6;61(22):8550-8557. doi: 10.1021/acs.inorgchem.2c00967. Epub 2022 May 23.
Molybdate oxide materials have attracted considerable academic interest owing to their multifunctional optoelectronic properties and applications. However, to date, studies on the intrinsic properties of multiple molybdates have rarely been implemented. Herein, a prospective triple molybdate crystal, RbLiZn(MoO), with high crystalline quality was successfully grown using top-seeded solution growth (TSSG) approaches. Intriguingly, it affords a cage-like structure with the 4̅3 space group, analogous to that of CaAlO (C12A7). The RbLiZn(MoO) crystal exhibits excellent thermal stability up to 603 °C, accompanied by a congruent melting nature. Simultaneously, it preserves the optical merits of a large band gap of 4.10 eV and a wide transmission window of 0.29-5.4 μm, which are superior to those of most molybdate crystals. More importantly, Raman spectroscopic measurements demonstrated that the title compound possesses an intense Raman shift located at 925 cm and narrow line width, facilitating a stimulated Raman laser. In addition, first-principles calculations were also implemented to elucidate the structure-property relationships of RbLiZn(MoO). These observations provide an empirical platform for intuitively comprehending the underlying properties of multiple molybdates and pave the way for exploiting Raman crystals.
钼酸盐氧化物材料因其多功能光电特性及应用而吸引了大量学术关注。然而，迄今为止，对多种钼酸盐本征性质的研究却鲜有开展。在此，采用顶部籽晶溶液生长（TSSG）方法成功生长出了具有高质量晶体的前瞻性三元钼酸盐晶体RbLiZn(MoO)。有趣的是，它具有类似于CaAlO（C12A7）的笼状结构及4̅3空间群。RbLiZn(MoO)晶体在高达603°C时表现出优异的热稳定性，且具有一致熔融特性。同时，它保留了4.10 eV的大带隙和0.29 - 5.4 μm的宽透射窗口等光学优点，优于大多数钼酸盐晶体。更重要的是，拉曼光谱测量表明，该标题化合物具有位于925 cm处的强烈拉曼位移和窄线宽，有利于实现受激拉曼激光。此外，还进行了第一性原理计算以阐明RbLiZn(MoO)的结构 - 性质关系。这些观察结果为直观理解多种钼酸盐的潜在性质提供了一个经验平台，并为开发拉曼晶体铺平了道路。
