Two POM-based lanthanide derivatives, namely triaqua[2,6-diacetylpyridine bis(semicarbazone)-κ5
O,N,N′,N′′,O′]terbium(III)}-μ-oxido-[tricosa-μ2-oxido-dodecaoxido-μ12-phosphato-dodecamolybdenum(VI)] pentahydrate (1), [Tb(C11H15N7O2)(H2O)3][PMo12O40]·5H2O, and the dysprosium(III) analogue (2), have been isolated successfully by the reaction of Keggin–POM [PMo12O40]3− (abbreviated as PMo12
), the Ln3+ ion and the Schiff base 2,6-diacetylpyridine bis(semicarbazone) (DAPSC) ligand under hydrothermal conditions. [Ln(DAPSC)(H2O)3][PMo12O40]·5H2O is a PMo12
-supported cluster featuring a lanthanide–Schiff base complex [denoted Ln–
L
(Schiff base)]. Single-crystal X-ray diffraction analysis reveals that the LnIII ion is in a distorted tricapped trigonal prismatic arrangement, coordinated by six O atoms and three N atoms. Two O atoms and three N atoms are provided by one DAPSC ligand, while the additional O atoms originate from a PMo12
cluster and three water molecules. Hydrogen-bonding interactions between adjacent clusters form an interesting three-dimensional supramolecular structure. The identities of 1 and 2 were characterized by IR spectroscopy, thermogravimetric analysis and powder X-ray diffraction. Interestingly, both compounds possess excellent two-photon absorption (TPA) responses to the third-order nonlinear optics (NLO) (2264 GM for 1 and 941 GM for 2), suggesting that they have potential applications in the field of nonlinear optics (NLO). To our knowledge, 1 and 2 are the first POM-based Ln–
L
(Schiff base) complexes showing excellent two-photon responses. Meanwhile, the electrochemical properties of both compounds were studied in detail.
两种以 POM 为基础的镧系元素衍生物,即 triaqua[2,6-diacetylpyridine bis(semicarbazone)-κ5
O,N,N′,N′′,O′]铽(III)}-μ-氧化-[三萨-μ2-氧代-十二氧代-μ12-磷代-十二钼(VI)]五水合物 (1),[Tb(C11H15N7O2)(H2O)3][PMo12O40]-5H2O、和镝(III)类似物(2)已通过 Keggin-POM [PMo12O40]3-(缩写为 PMo12
)、Ln3+ 离子和希夫碱 2,6-二乙酰基吡啶双(半咔唑酮)(DAPSC)配体在水热条件下发生反应,成功分离出了镝(III)类似物 (2)。[Ln(DAPSC)(H2O)3][PMo12O40]-5H2O 是一种 PMo12
-支持的团簇,其特征是镧系元素-希夫碱配合物[表示为 Ln-
L
(希夫碱)]。单晶 X 射线衍射分析表明,LnIII 离子呈扭曲的三顶三棱柱排列,由六个 O 原子和三个 N 原子配位。两个 O 原子和三个 N 原子由一个 DAPSC 配体提供,而其他 O 原子则来自一个 PMo12
簇和三个水分子。相邻团簇之间的氢键相互作用形成了有趣的三维超分子结构。红外光谱、热重分析和粉末 X 射线衍射表征了 1 和 2 的特性。有趣的是,这两种化合物都对三阶非线性光学(NLO)具有极好的双光子吸收(TPA)响应(1 为 2264 GM,2 为 941 GM),这表明它们在非线性光学(NLO)领域具有潜在的应用前景。据我们所知,1 和 2 是第一个基于 POM 的 Ln-
L
(希夫碱)复合物表现出优异的双光子响应。同时,我们还详细研究了这两种化合物的电化学特性。