Anion dependent self-assembly of sandwich 13-metal Ni–Ln nanoclusters with a long-chain Schiff base ligand
作者:Shiqing Wang、Xiaoping Yang、Jinjie Qian、Qipeng Li、Zhongning Chen、Lijie Zhang、Shaoming Huang、Chengri Wang、Richard A. Jones
DOI:10.1039/c6dt03830a
日期:——
Two classes of Ni–Ln clusters [Ln4Ni3L3(OAc)6(NO3)3(OH)3] (Ln = Gd (1) and Tb (2)) and [Ln6Ni7L6(OAc)12(OH)6](OH)2 (Ln = Gd (3) and Dy (4)) were prepared using a specifically designed Schiff base ligand built around a flexible (CH2)2O(CH2)2O(CH2)2 chain. 1 and 2 exhibit cone-like structures, while 3 and 4 have nanosized sandwich architectures. The structures were studied by single-crystal X-ray diffraction
两类Ni–Ln团簇[Ln 4 Ni 3 L 3(OAc)6(NO 3)3(OH)3 ](Ln = Gd(1)和Tb(2))和[Ln 6 Ni 7 L 6(使用围绕柔性(CH 2)2 O(CH 2)2 O构建的经过特殊设计的席夫碱配体制备OAc)12(OH)6 ](OH)2(Ln = Gd(3)和Dy(4))(CH 2)2链。图1和图2具有圆锥状结构,而图3和图4具有纳米三明治结构。通过单晶X射线衍射和TEM研究了结构,并研究了磁性。
Construction of a crystalline 14-metal Zn–Nd rectangular nanocluster with a dual-emissive response towards metal ions
作者:Jieni Liu、Xiaoping Yang、Ting Zhu、Bichen Yuan、Hongfen Chen、Dongliang Shi、Desmond Schipper、Richard A. Jones
DOI:10.1039/c9ra09409a
日期:——
A crystalline 14-metal Zn–Nd nanocluster was constructed, and it shows ligand-centered and lanthanide fluorescence response towards metal ions.
Three multinuclear Cd-Ln complexes [Er2Cd2L2(OAc)(2)(OH)(2)(OCH3)(2)] (1) and [Ln(2)CdL(2)(NO3)(4)] (Ln = Er (2) and Sm (3)) were prepared using a flexible long-chain Schiff base ligand. Interestingly, 1-3 show nanorectangular-like structures (i.e. 8 x 12 x 12 angstrom for 1 and 7 x 10 x 15 angstrom for 2 and 3). 1 has a tetranuclear structure with two lanthanide ions and two Cd2+ enclosed by two flexible Schiff base ligands (H2L), while 2 and 3 show trinuclear structures with the Cd(II) ion located in the center. Upon excitation of the ligand-centered absorption bands, 1-2 and 3 show typical emission spectra for Er3+ and Sm3+ ions, respectively. Luminescence studies exhibit that I shows higher emission quantum yield than 2. (C) 2018 Elsevier Ltd. All rights reserved.