Abstract
In this article, we demonstrate luminescent properties of PLA blended with new 3-[2-(4-methylphenyl)-2-oxoethyl]-5-(thiophen-2-ylmethylidene)-1, 3-thiazolidine-2, 4-dione and 3-[2-(4-chlorophenyl)-2-oxoethyl]-5-(thiophen-2-ylmethylidene)-1, 3-thiazolidine-2, 4-dione (TD). This paper mainly aims at the preparation of intercalated thin films of PLA and TD. The formation of matrix-dopant composite films was confirmed by FTIR, SEM, TGA, DSC and XRD characterizations. This work really stands out from our previous work as TD has been better recognized as drug material in the medical field and less known as an organic fluorophore in luminescent materials. Pure PLA exhibits absorption maximum at 300nm whereas absorption of TD doped composite films resulted in Stoke’s shift to 350nm. These films turned into blue emissive layers showing emission band at 440nm on being shined at 350nm. The quantitative increase in the absolute quantum yield of 0.18-0.42 and 0.16-0.52 for the aforesaid materials was demonstrated which was in accordance with the concentration of the dopant in the film. Thus, the material obtained by PLA-TD combination was found to absorb UVA radiations and emit blue light, which not only might emerge as prospective material for bioplastic scintillation but also as ecofriendly blue emissive layers.
Published Version
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