Jiang Hai-Long, Ma En, Mao Jiang-Gao
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China.
Inorg Chem. 2007 Aug 20;46(17):7012-23. doi: 10.1021/ic700793n. Epub 2007 Jul 11.
Solid-state reactions of lanthanide(III) oxide (and/or lanthanide(III) oxychloride), MoO3 (or WO3), and TeO2 at high temperature lead to eight new luminescent compounds with four different types of structures, namely, Ln2(MoO4)(Te4O10) (Ln = Pr, Nd), La2(WO4)(Te3O7)2, Nd2W2Te2O13, and Ln5(MO4)(Te5O13)(TeO3)2Cl3 (Ln = Pr, Nd; M = Mo, W). The structures of Ln2(MoO4)(Te4O10) (Ln = Pr, Nd) feature a 3D network in which the MoO4 tetrahedra serve as bridges between two lanthanide(III) tellurite layers. La2(WO4)(Te3O7)2 features a triple-layer structure built of a [La2WO4]4+ layer sandwiched between two Te3O72- anionic layers. The structure of Nd2W2Te2O13 is a 3D network in which the W2O108- dimers were inserted in the large tunnels of the neodymium(III) tellurites. The structures of Ln5(MO4)(Te5O13)(TeO3)2Cl3 (Ln = Pr, Nd; M = Mo, W) feature a 3D network structure built of lanthanide(III) ions interconnected by bridging TeO32-, Te5O136-, and Cl- anions with the MO4 (M = Mo, W) tetrahedra capping on both sides of the Ln4 (Ln = Pr, Nd) clusters and the isolated Cl- anions occupying the large apertures of the structure. Luminescent studies indicate that Pr2(MoO4)(Te4O10) and Pr5(MO4)(Te5O13)(TeO3)2Cl3 (M = Mo, W) are able to emit blue, green, and red light, whereas Nd2(MoO4)(Te4O10), Nd2W2Te2O13, and Nd5(MO4)(Te5O13)(TeO3)2Cl3 (M = Mo, W) exhibit strong emission bands in the near-IR region.
镧系元素（III）氧化物（和/或镧系元素（III）氯氧化物）、MoO3（或WO3）与TeO2在高温下发生固态反应，生成了八种具有四种不同结构类型的新型发光化合物，即Ln2(MoO4)(Te4O10)（Ln = Pr、Nd）、La2(WO4)(Te3O7)2、Nd2W2Te2O13以及Ln5(MO4)(Te5O13)(TeO3)2Cl3（Ln = Pr、Nd；M = Mo、W）。Ln2(MoO4)(Te4O10)（Ln = Pr、Nd）的结构具有三维网络，其中MoO4四面体充当两个镧系元素（III）亚碲酸盐层之间的桥梁。La2(WO4)(Te3O7)2具有由夹在两个Te3O72-阴离子层之间的[La2WO4]4+层构成的三层结构。Nd2W2Te2O13的结构是一个三维网络，其中W2O108-二聚体插入到钕（III）亚碲酸盐的大隧道中。Ln5(MO4)(Te5O13)(TeO3)2Cl3（Ln = Pr、Nd；M = Mo、W）的结构具有三维网络结构，由通过桥连的TeO32-、Te5O136-和Cl-阴离子相互连接的镧系元素（III）离子构成，MO4（M = Mo、W）四面体覆盖在Ln4（Ln = Pr、Nd）簇的两侧，孤立的Cl-阴离子占据结构的大孔径。发光研究表明，Pr2(MoO4)(Te4O10)和Pr5(MO4)(Te5O13)(TeO3)2Cl3（M = Mo、W）能够发出蓝色、绿色和红色光，而Nd(2MoO4)(Te4O10)、Nd2W2Te2O13和Nd5(MO4)(Te5O13)(TeO3)2Cl3（M = Mo、W）在近红外区域表现出强发射带。
