Enhancing the Solubility of Curcumin Metal Complexes and Investigating Some of Their Biological Activities

Table 1

The frequency of functional groups in curcumin and its complex in the IR spectrum.

Groups	Curcumin (cm^−1)	Cur-Ca(II) (cm^−1)	Cur-Fe(III) (cm^−1)	Cur-Zn(II) (cm^−1)
−OH	3500.67	—	—	3532.40
−C=O	1626.35	1589.17	1619.85	1624.09
−C=C−	1601.87	1557.49	1589.05	1594.06
−C−O−C−	1113.59	1124.27	1121.05	1120.57
	2970.78	2971.65	2988.17	2942.10
	1505.77	1479.60	1486.93	1491.92
	1455.92	1448.65	1447.31	1451.02