[Nd(H_2O)_4(NO_3)_3]·(4,4'-bipy)_2·H_2O的合成、晶体结构和荧光(英文)

通过水热反应合成了一种稀土化合物Nd(H2O)4(NO3)3]·(4,4'-bipy)2·H2O(bipy=4,4’-联吡啶)(1),并对该化合物进行了X-射线单晶结构表征。该化合物属于正交晶系,空间群为P212121,晶胞参数如下:a=7.1190(5),b=16.098(1),c=24.734(1),C20H26N7NdO14,Mr=732.72,V=2834.6(3)3,Z=4,Dc=1.717g/cm3,S=1.201,μ(MoKα)=1.910mm–1,F(000)=1468,R=0.0449和wR=0.0722。该化合物具有孤立结构特征,其中稀土原子具有扭曲的双帽四方反棱柱构型。该化合物分子之间通过氢键形成二维波浪层状结构。光致发光研究发现该化合物发射强的紫色光。

MAGNETO IMPEDANCE EFFECT OF FESIB AMORPHOUS ALLOY RIBBONS

Nd（H2O）4（NO3）3].（4,4＇-bipy）2.H2O（1） （bipy = bipyridine） has been synthesized via hydrothermal reaction and characterized by X-ray diffraction. The crystal belongs to orthorhombic, space group P212121 with a = 7.119 0（5）, b = 16.098（1）, c = 24.734（1）A, C20H26NTNdO14, Mr = 732.72, V = 2 834.6（3） A3, Z = 4, Dc = 1.717 g/cm^3, S = 1.201, μ（MoKa） = 1.910 mm^-1, F（000） = 1 468, R = 0.044 9 and wR = 0.072 2. The crystal structure analysis of 1 reveals that the title complex features an isolated structure, based on two discrete 4,4＇-bipy moieties, one lattice water molecule and one neodymium atom in a distorted bicapped square antiprism environment. The 4,4＇-bipy moieties and water molecules are held together via hydrogen bonding to form a two-dimensional wavy layer. Photoluminescent investigation reveals that the title complex displays a strong violet-light emission, which maybe originate from ：π→π＊ charge-transfer interaction of 4,4＇-bipy. IR and elemental analyses are also reported.