Table 3: The FT-IR spectra of H2L (A1) and its metal complexes.


(H2O/OH) N-H Ar C-H C=N C−O M−O M−N

H2L (A1) 3403–3305 3287 2922 1637 1374, 1244

Mn(L)2 3446–3440 3286 2923 1604 1249 648 563

Fe(C8H9N2O)3 2925 1608 1246 637 498
Fe(L)3

Co(L)2 3287 2925 1605 1244 661 579

Ni(L)22H2O 33465–3433 2924 1607 1245 662 497

Cu(L)2·2H2O 3448–3440 2924 1623 1200 608 548

Zn(L)2 3231 2924 1605 1245 661 575

Hg(L)2 3209 2926 1605 1244 662 601

Ce(C8H9N2O)2 2929 1608 1247 662 566
Ce(L)3

UO2(L)2H2O 3445–3435 2926 1605 1247 662 576