稀土(Ⅲ)(4′,5′-二溴苯并-15-冠-5)配合物的制备及表征

Preparation and Characterization of Complexes of 4′,5′-Dibromobenzo-15-Crown-5 with Rare Earth(Ⅲ)

合成了 6种稀土硝酸盐与 4′,5′-二溴苯并 - 1 5-冠 - 5(L)的新固体配合物 .经元素分析确定其组成为 RE(NO3 ) 3 · L(RE=La～ Nd)和 RE(NO3 ) 3 · L· CH3 CN· 2 H2 O(RE=Sm,Eu) ,并进行了 IR,UV,TG- DTA,摩尔电导及 X-射线粉末衍射物相分析等性质表征 。

Six new solid complexes of 4′,5′ dibromobenzo 15 crown 5(L) with rare earth (Ⅲ) nitrates have been synthesized and characterized by elemental analysis, IR, UV, TG DTA, molar conductance and X ray powder diffraction analyses. The complexes are composed of RE(NO 3) 3·L( RE [ZJLX,Y] La～Nd ) and RE(NO 3) 3·L·CH 3CN·2H 2O( RE [ZJLX,Y] Sm,Eu ) respectively. The coordination number of the rare earth cation in the complexes is 11 for La, Ce, Pr and Nd and 8 for Sm, Eu. In the complexes of samarium and europium, the crown ether is coordinated with Sm 3+ or Eu 3+ via water molecules.