COMPLEXO LUMINESCENTE DE TÉRBIO APLICADO Á SISTEMAS DE ANTI FALSIFICAÇÃO DE SUPERFÍCIES
DOI :
https://doi.org/10.22409/engevista.v21i2.27184Résumé
Os meios de falsificação de superfícies de papel decrescem com a eficiência dos agentes reveladores de lisura empregados. Sistemas luminescentes despontam na atuação de anti falsificação pela dificuldade de se manipular o grau de luminescência usado na superfície e a possibilidade de serem conferidos imediatamente sob forte luz solar ou ultravioleta. O térbio trivalente foi utilizado coordenado por dois sistemas orgânicos, onde o primeiro atuou como agente cromóforo (zwitteríon-Z) e o segundo atuou com agente aderente do sistema à superfícies de papel (ácido tereftálico-BDC). O sistema luminescente foi devidamente caracterizado tanto para elucidação da estrutura obtida por técnicas de FTIR, RMN e TGA, quanto para averiguar sua capacidade luminescente. Os resultados apontam para um eficiente composto, capaz de revelar por meio da emissão de luz verde a veracidade na superfície de documentos de papel.Téléchargements
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