Spectral, NLO, Fluorescence, and Biological Activity of Knoevenagel Condensate of 𝛽-Diketone Ligands and Their Metal(II) Complexes

Table 2

IR spectral data (cm⁻¹) of ligands L1 and L2 and their metal(II) complexes.

Compound	ν(C=O)	ν(C=C)	ν(OH) of H2O
L1	1695	1600	—
L1a	1676	1548	3448
L1b	1629	1540	3427
L1c	1683	1563	3419
L2	1699	1629	—
L2a	1651	1597	—
L2b	1687	1614	—
L2c	1685	1620	—