Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the -Diketonates Biscatecholamide Ligand

Table 2

The FTIR spectral frequencies (cm⁻¹) and tentative assignments for the free ligands and uranyl complexes.

	Complex 1		Complex 2		Complex 3	Assignment of vibration
3398	3379	3397	3367	3400	3390	ν(OH)
3104, 2957	3103, 2961	3094, 2956	3101, 2958	3083, 2927	3102, 2954	ν(C-H)
1750	1746	1747	1742	1746	1742	ν(C=O) (β-diketonate)
1643	1588	1641	1587	1640	1587	ν(C=O)
1547	1546	1547	1546	1546	1546	δ(C-N-H)
1488	1461	1487	1461	1487	1461	δ(CH2) s
1460	1439	1460	1444	1460	1444	δ(CH2) s
1364	1367	1361	1384	1361	1384	δ(O-H)
1337	1350	1337	1346	1334	1342	ν(C-N)
—	1309	—	1307	—	1309	ν(C-N) and δ(N-H)
1266	1260	1266	1256	1266	1256	ν(C-O)
—	1217	—	1217	—	1218	ν(C-O-U)
1178	1174	1177	1173	1171	1171	(C-O-C)
1156	1157	1158	—	1157	—	δ(C-O)
1073	1091	1072	1090	1069	1089	(C-O-C)
1038	1039	1038	1052	1045	1053	δ(C-H)
—	927	—	929	—	927	ν(U=O) as
845	856	834	847	842	853	δ(C-H)
767, 743	783, 740	786, 743	793, 742	775, 742	788, 743	δ(C-H) (benzene ring)
—	550	—	550	—	550	ν(U=O)s