Table 7.
Thermogravimetric results of the complexes.
| Complexes | Hygroscopic water | Coordinated water | ||||||
|---|---|---|---|---|---|---|---|---|
| T/°C | % Weight loss | No. of water molecule | T/°C | % Weight loss | No. of water molecule | |||
| found | calc | found | calc | |||||
| Sc[L1(NO3)3 (H2O)] | — | — | — | — | 130–235 | 2.62 | 2.78 | 1 |
| Ce[L1(NO3)3 (H2O)2] | — | — | — | — | Up to 220 | 4.89 | 4.72 | 2 |
| Sc[L2(NO3)2 (NH3)2]NO3 | — | — | — | — | — | — | — | — |
| Y[L4(H2O)5](NO3)3·3H2O | 92 | 6.18 | 6.49 | 3 | 130–210 | 9.20 | 10.82 | 5 |
| Ce[L4(H2O)5](NO3)3·8H2O | 90 | 14.20 | 12.80 | 8 | 130–210 | 10.20 | 9.25 | 5 |
| Y[L5(NO3)3 (H2O)2] | — | — | — | — | 160–210 | 3.99 | 4.78 | 2 |
| Sc[L7(NO3)(H2O)3](NO3)2 | — | — | — | — | 170–220 | 6.42 | 7.38 | 3 |
| La[L7(NO3)(H2O)3](NO3)2 | — | — | — | — | 180–240 | 6.49 | 6.08 | 3 |
| Y[L8(NO3)3 (NH3)]·0.5H2O | 98 | 1.13 | 1.16 | 0.5 | — | — | — | — |
| La[L8(H2O)5](NO3)3 | — | — | — | — | 190–250 | 11.63 | 10.11 | 5 |
| Sc[L9(H2O)4](NO3)3·7H2O | 90 | 14.60 | 13.42 | 7 | 140–210 | 6.22 | 7.67 | 4 |
| Y[L9(NO3)3 (C2H5OH)2] | — | — | — | — | — | — | — | — |
| La[L9(NO3)2 (H2O)3](NO3)·4H2O | 85 | 7.00 | 7.49 | 4 | 130–160 | 5.58 | 5.62 | 3 |
| Ce[L9(H2O)5](NO3)3·H2O | 105 | 2.47 | 1.95 | 1 | 160–220 | 8.95 | 9.73 | 5 |
| Sc[L12(H2O)4](NO3)3·H2O | 100 | 2.05 | 2.10 | 1 | 160–260 | 9.19 | 8.39 | 4 |
| Y[L12(NO3)3 (C2H5OH)2] | — | — | — | — | — | — | — | — |
| La[L12(H2O)5](NO3)3·3H2O | 95 | 4.00 | 5.37 | 3 | 130–160 | 11.70 | 10.95 | 5 |
| Ce[L12(NO3)2(H2O)3](NO3)·H2O | 100 | 2.17 | 1.95 | 1 | 130–220 | 5.20 | 5.86 | 3 |