Eu(α-NMA)_3(α-HNMA)Phen的晶体结构及光谱研究

Eu(α-NMLA)_3（α-HNMA）Phen（NMA=萘甲酸根；HNMA＝萘甲酸；Phen＝群， 晶胞参数α=l.2401（3）nm，b=1．3056（3）nm，C=1．6500（3）nm，α=2． 2572（8）nm~3，Z=2，D_c＝l ．496g/cm，F（000）=1026，R=0．0517．该配合物 是双酸根的竣基桥联．中心离子分别与五个竣基桥氧原子、一个鳌合配位梭基的2 个氧原子和一个邻菲咯啉的2个N原子配位，形成九配位的扭曲三帽三棱柱体，双核 分子中萘环与邻菲咯啉平面之间存在着π-π相互作用，有利于该配位构型的稳光 光谱测定结果显示，标题配合物发光性能良好．

Crystal Structure and Spectra of Eu(

The crystal of complex Eu(a-NMA)_3(a-HNMA)Phen (NMA = naphthoate; HNMA = naphthoic acid and phen= 1,10-phenanthroline) belongs to triclinic, PI space group, with cell parameters a = 1.2401(3) nm, b = 1.3056(3) nm, c = l.6500(3) nm, a =73.01(3)°, β= 82.44(3)°, 3w; w, w, w = 62.07(3)°, V = 2.2572(8) nm3, Z =2, D_c= 1.496 g/cm~3, F(000) = 1026, R = 0.0517. The complex is a binuclear molecule with the four bridged carboxylate groups of the naphthoate bonded to the two europium ions. Each ion is linked to five oxygen atoms from the bridging carboxylates, two oxygen atoms from a chelating carboxylate group and two nitrogen atoms of a phenanthroline, forming a nine coordinated distorted tricapped trigonal prism. The intramolecular it- it interaction between naphthoate and phenantnroline planes may stabilize the coordination geometry. The result of fluorescence spectra indicates that the title complex has excellent luminescence properties.