“…Eosin Y exhibits its main peaks at 1554, 1456, and 1350 cm −1 assigned to the COO − anti-symmetric, quinone-like C=O, and COO − symmetric stretching vibrations, respectively [20,49]. The acetate ion of zinc acetate exhibited peaks at 1560, 1450−1390, and 680 cm −1 assigned to the COO − anti-symmetric stretching, symmetric stretching, and out-of-plane bending vibrations, respectively [50][51][52][53].…”