A new strategy to prepare high luminescent films containing polypropylene and polyamide doped with Eu3+β-diketonate complex

Author(s)

Parra, D. F. ; Marchini, L. G. ; Felinto, M. C. F. C. ; Brito, H. F.

• Document type: Journal article
• Source: Optical Materials; v. 152, p. 8-pg., 2024-04-29.

Abstract

A new strategy for obtaining stable luminescent polypropylene (PP) one polymer among the most consumed plastic materials is reported. PP is a polymer of nonpolar olefinic macrochains, preventing direct doping with rare earth complexes. The synthesis of the polyamide (PA) polymer doped with hydrated complex [Eu (tta)3(H2O)2] and its encapsulation in PP polymer produced a luminescent material stable under processing conditions of the plastic films as never been seen before. The preparation of the Eu3+ beta-diketonate complex and polyamide solution produced a high luminescent material. The processed polymeric films doped in different concentration fo the europium complex were characterized by infrared spectroscopy (FTIR), X-ray diffractometry (XRD), emission spectroscopy, and thermogravimetry (TG). The emission spectra of the luminescent doped polymeric films exhibited the characteristic narrow bands arising from the 5D0 -> 7FJ transitions (J = 0-4) of the Eu3+ ion. The values of the Omega 2 and Omega 4 experimental intensity parameters were calculated and discussed. The high values of the intrinsic emission quantum yields (QEuEu) of the PA:[Eu(tta)3(H2O)2] systems suggest that these films can be applied as optical markers as well as the encapsulated systems of the (PP) as PP/PA:(x%)Eu(tta)3 films (x = 1, 5, and 10 %). The stability was promoted via PP encapsulation resulting in a luminescent plastic film with high stability under processing. (AU)

• FAPESP's process: 21/08111-2 - Development of rare earth based light converters: luminescent markers, optical sensors, and amplifiers
• Grantee: Hermi Felinto de Brito
• Support Opportunities: Research Projects - Thematic Grants