Avaliação química e aplicação de curcuminas derivadas de Cinamaldeído como potenciais reveladores de impressões digitais

Abstract

Curcumine analogues comprehend a class of substances that can be applied in several areas including Papiloscopy which studies human identification through fingerprints. Fingerprints are important trace evidences in criminal investigations since it enables human identification in civil and criminal instances. Usually, fingerprints are found in their latent form (invisible to the naked eye) so that an appropriate developing technique is necessary for fingerprint visualization. In this sense, the aim of this work was to synthesize, characterize and study the chemical properties of cinnamaldehyde-derived curcumins by evaluating them as a novel fingerprinting development material. Results showed that the products (2a, 2b and 2c) had a yield above 52% showing that the methodology used was efficient. It was also possible to identify by Infrared Spectroscopy the C=H, C-H, C=O, C=C and C-C bonds which are present in the synthesized curcumins. Likewise, it was possible to identify the molecules by Gas Chromatography-Mass Spectrometry through their respective molecular masses (m/z), and by Nuclear Magnetic Resonance through the location of the 1H and 13C in the structures. In the fingerprint development experiments, powder 1b allowed the visualization of dermal features and their minutiae and, thus, human identification. Therefore, curcumin derivatives were synthesized and characterized adequately and the powder 1b was able to develop latent fingerprints being a potential alternative to commercial powders.