Oliveira Neto, João G.Cavalcante, Lincoln A.Gomes, Eduardo S.Dos Santos, Adenilson O.Sousa, Francisco FMendes, Fernando 1973-Macêdo, Ana Angélica M2020-04-172020-04-172019-10-01Oliveira Neto, J. G. et al. Crystalline Films of L‐Threonine Complexed with Copper (II) Dispersed in a Galactomannan Solution: A Structural, Vibrational, and Thermal Study. Polym. Eng. Sci. pen.25260 (2019). doi:10.1002/pen.252601548-2634http://hdl.handle.net/10400.26/32016The study’s aim was to synthesize a crystalline film formed by L-threonine crystals complexed with Cu2+ ions (LTCu) dispersed in a galactomannan (Gal) solution as well as to characterize its structural, vibrational, and thermal properties. Gal(LTCu) films were prepared by the addition of copper II L-threoninate crystals in concentrations of 0.25, 0.50, and 0.75 in 2%Gal solution. To characterize the Gal(LTCu) properties, we used X-ray diffraction (XRD), UV–Vis and Raman spectroscopy, thermogravimetry, and thermal analyses (TG- DTA). XRD showed that the Gal(LTCu) films are crystalline and have acquired coloration similar to the one of LTCu crystal. The UV–Vis spectra revealed that the films tend to assume a square planar conformation due to Jahn Teller effect. Bands related to the interaction between the metal ion with the organic compounds were observed through the Raman spectra. TG-DTA showed that the films exhibit low thermal stability due to the dehydration processengCrystalline filmsThreonineCopperGalactomannan solutionjournal article10.1002/pen.25260