TỔNG HỢP, TÍNH CHẤT PHỨC CHẤT HỖN HỢP PHỐI TỬ AXETYLSALIXYLIC VÀ 2,2’-DIPYRIDYL N,N’ -DIOXIT CỦA MỘT SỐ NGUYÊN TỐ ĐẤT HIẾM NẶNG
Some complexes of Ln (III) (Ln: Dy, Tm, Yb) with mixed ligands acetylsalicylic and 2,2’-dipyridyl N,N’-dioxide have been synthesised. They have general formula is Ln(Bez)3(DipyO2) (Ln: Dy, Tm, Yb; AcSa-:acetylsalicylate, DipyO2: 2,2’-dipyridyl N,N’-dioxide). The characterization of these complexes have been investigated by IR, thermal analysis and mass-spectroscopy methods. The coordination modes of the ligands to Ln(III) centres have been investigated by IR spectra. Massspectroscopy showed that the complexes are monomes. TG- curves indicate that the complexes are unstable temperature and anhydrous state.