Vibrational spectra of mono, di and trimethyl ammonium double sulphates of rare earths Pr, Nd, Ho and Eu
作者:R.S. Jayasree、V.U. Nayar、V. Jordanovska
DOI:10.1016/j.saa.2005.10.043
日期:2006.10
four rare earth (Ho, Eu, Nd and Pr) double sulphates have been recorded and analysed based on the vibrations of methyl ammonium cations, sulphate anions and water molecules. Formation of hydrogen bonds of the type N-H...O and O-H...O are identified in all the compounds. Bifurcated hydrogen bonds are present in the compounds with dimethyl ammonium cations. The sulphate anions are distorted and occupy a
根据甲基铵阳离子,硫酸根阴离子和水分子的振动,记录并分析了四种稀土(Ho,Eu,Nd和Pr)双硫酸根的红外和拉曼光谱。在所有化合物中均确定了NH ... O和OH ... O型氢键的形成。具有二甲基铵阳离子的化合物中存在分叉的氢键。硫酸根阴离子被扭曲并在化合物中占据较低的位点对称性。对于(CH(3))(2)NH(2)和SO(4)(2-)离子获得的谱带表明(CH(3))(2)NH(2)Eu(SO( 4))(2).H(2)O和(CH(3))(2)NH(2)Ho(SO(4))(2).4H(2)O是相同的。已经确定并讨论了在这两种化合物的拉曼光谱中观察到的Eu(3+)和Nd(3+)的电子跃迁带。