Rare-earth (RE) coordination polymers are infinitely tailorable to yield luminescent materials for various applications. Here we described the synthesis of a heterometallic rare-earth coordination compound ((CH₃)₂SO)₃(RE)NbO(C₂O₄)₃ ((CH₃)₂SO) = dimethylsulfoxide, DMSO, (C₂O₂ = oxalate), (RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb). The structure was obtained from single crystal X-ray diffraction of the La analogue. The Nb˭O and DMSO terminal-bonding character guides assembly of an open framework structure with noncentrosymmetric RE-coordination geometry, and large spacing between the RE centers. A second structure was observed by PXRD for the smaller rare earths (Dy, Ho, Er, Yb); this structure has not yet been determined. The materials were further characterized using FTIR, and photoluminescence measurements. Characteristic excitation and emission transitions were observed for RE = Nd, Sm, Eu, and Tb. Quantum yield (QY) measurements were performed by exciting Eu and Tb analoges at 394 nm (QY 66%) and 464 nm (QY 71%) for Eu; and 370 nm (QY=40%) for Tb. We attribute the high QY and bright luminescence to two main structure-function properties of the system; namely the absence of water in the structure, and absence of concentration quenching.

稀土（RE）配位聚合物可无限调整以生产用于各种应用的发光材料。在这里我们描述了杂金属稀土配位化合物（（CH ₃）₂ SO）₃（RE）NbO（C ₂ O ₄）₃ （（CH ₃）₂ SO）=二甲基亚砜，DMSO，（C ₂ O ₂ =草酸盐）（RE = La，Ce，Pr，Nd，Sm，Eu，Gd，Tb）。该结构由La类似物的单晶X射线衍射获得。Nb˭O和DMSO末端键合字符可指导具有非中心对称RE配位几何构型且RE中心之间的间距较大的开放框架结构的组装。PXRD观察到第二种结构是较小的稀土元素（Dy，Ho，Er和Yb）；该结构尚未确定。使用FTIR和光致发光测量对材料进行进一步表征。观察到RE = Nd，Sm，Eu和Tb的特征激发和发射跃迁。量子产率（QY）的测量是通过激发Eu和Tb类似物在394  nm（QY 66％）和464  nm（QY 71％）下激发Eu来进行的；和370 Tb的nm（QY = 40％）。我们将高QY和明亮的发光归因于系统的两个主要结构功能特性。即在结构中没有水，并且没有浓度猝灭。