europium(III) methacrylate;
lanthanum(III) methacrylate;
binuclear complex;
density functional theory;
quantum chemistry;
IR spectra;
ELECTRONIC-STRUCTURE;
CRYSTAL-STRUCTURE;
UNSATURATED-ACIDS;
LUMINESCENCE;
COMPLEXES;
D O I:
10.1134/S0022476618020105
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
DFT-D3/PBE0 and IR spectroscopy are employed to study the vibrational structure of europium(III) and lanthanum(III) methacrylates Ln(Macr)(3) (Ln = Eu, La; Macr is the methacrylate anion, CH2CH(CH3)COO-). The calculated geometric and vibrational characteristics are consistent with the experimental data. By means of the calculation of the Eu-2(Macr)(6)center dot(H2O)(4) complex the experimental IR spectrum is interpreted. The effect of isomorphic lanthanum substitution for the europium ion in the Eu-2(Macr)(6)center dot(H2O)(4) complex is studied theoretically. A mechanism is proposed for the effect of the vibrational structure on the optical properties (at the isomorphic replacement of the europium ion and temperature elevation).