Research Article
Synthesis, Characterization of La(III), Nd(III), and Er(III) Complexes with Schiff Bases Derived from Benzopyran-4-one and Thier Fluorescence Study
Table 4
Thermogravimetric analysis data of some metal complexes.
| | Complexes | M : L | Dehydration stage | Decoordination stage | Metal oxide (Ln2O3) residue % | | | Temp. | % Weight loss | Temp. | % Weight loss | Temp. °C | Calc. | Found | | | range | Calc. | Found | range | Calc. | Found | | |
| | La L1.OH.4H2O.NO3.2H2O | 1 : 1 | 50–120 | 5.80 | 5.78 | 120–250 | 11.60 | 11.56 | 700 | 26.22 | 26.00 | | Nd L1.OH.4H2O.NO3.4H2O | 1 : 1 | 30–140 | 10. 87 | 10.79 | 140–250 | 10.87 | 10.82 | 700 | 25.38 | 25.40 | | Er2 L2.2NO3.OH.2C2H5OH.3H2O. NO3.3H2O | 2 : 1 | 50–110 | 4.33 | 4.52 | 175–250 | 4.33 | 4.20 | 550 | 30.64 | 30.76 | | Er2 L3.2NO3.4H2O.2OH.H2O | 2 : 1 | 36–61 | 1.65 | 1.66 | 61–267 | 6.59 | 6.38 | 900 | 34.99 | 34.38 |
|
|
