Liu Jinglin, Wang Dan, Xu Xin, Li Hailou, Zhao Junwei, Chen Lijuan
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Inorg Chem. 2021 Feb 15;60(4):2533-2541. doi: 10.1021/acs.inorgchem.0c03443. Epub 2021 Jan 25.
A family of multinuclear rare-earth (RE)-implanted Htart-functionalized selenotungstates (STs) [HN(CH)]H{WO(OH)(Htart){[WORE(HO)][SeWO]}}·31HO [RE = Eu (), Tb (), Dy (), Ho (), Y (); Htart = d-tartaric acid] have been afforded by a simple one-pot aqueous reaction and were structurally characterized. Intriguingly, their isomorphous organic-inorganic hybrid anion {WO(OH)(Htart){[WORE(HO)][SeWO]}} includes two sandwich-type {[WO[RE(HO)][SeWO]} dimeric units with a W-O-RE heterometal core, which are further joined by two Htart-decorated dinuclear tungsten-oxo {WO(OH)(Htart)} clusters and a bridging Htart ligand, contributing to a surprising Mobius band-like configuration. It is worth emphasizing that three Htart ligands coordinate with tungsten centers rather than RE cations. For all we know, - delegate the infrequent RE-implanted STs functionalized by triplicate Htart bridges. Furthermore, fluorescent performances of - as well as magnetic properties of - have been surveyed. The solid-state fluorescence emission spectra prove that each of them undoubtedly shows the characteristic emission peaks of RE cores, while alternating-current susceptibility measurements suggest field-induced single-molecule magnetic behavior in .
通过简单的一锅水相反应制备了一系列多核稀土（RE）植入的酒石酸官能化硒钨酸盐（STs）[HN(CH)]H{WO(OH)(酒石酸){[WORE(HO)][SeWO]}}·31HO [RE = Eu (), Tb (), Dy (), Ho (), Y (); 酒石酸 = d - 酒石酸]，并对其结构进行了表征。有趣的是，它们同构的有机 - 无机杂化阴离子{WO(OH)(酒石酸){[WORE(HO)][SeWO]}}包含两个具有W - O - RE异金属核心的三明治型{[WO[RE(HO)][SeWO]}二聚体单元，这些单元通过两个酒石酸修饰的双核钨氧{WO(OH)(酒石酸)}簇和一个桥连的酒石酸配体进一步连接，形成了令人惊讶的莫比乌斯带状构型。值得强调的是，三个酒石酸配体与钨中心配位而非RE阳离子。据我们所知， - 代表了由三重酒石酸桥官能化的罕见的RE植入STs。此外，还研究了 - 的荧光性能以及 - 的磁性。固态荧光发射光谱证明它们每一个都无疑显示出RE核心的特征发射峰，而交流磁化率测量表明在 - 中存在场诱导的单分子磁行为。
