Functionalization of PAMAM dedrimers with curcumin: Synthesis, characterization, fluorescent improvement and application on PET polymer

Abstract

<p style="text-align: left;">Environmentally friendly and healthier demands of people lead to grow the application of the natural dyes,<br /> although some difficulties limit their usages. This means that overcoming these issues will suggest the exchange<br /> of synthetic dyes having many environmental problems with natural dyes. In the current study, to develop the<br /> natural dyes, we have enhanced the fluorescence intensity of yellow-emitting curcumin dye, by its covalently<br /> bonding to PAMAM dendrimer from G0, G1, G2 generations. The chemical structures of modified materials have<br /> been confirmed by FTIR, 1HNMR, 13CNMR, UV&ndash;Vis, DSC and Elemental Analysis techniques. The synthesized<br /> compounds have been used for polyethylene terephthalate (PET) fabrics dyeing at high temperature to study<br /> their color characteristics. On the other hand, the spectral characteristics of dendrimers have been evaluated in<br /> organic solvents with different polarity. The influence of dendrimer generation on the fluorescence intensity and<br /> quantum yield has also been described. The results showed that the new dendrimers can be used for PET fabrics<br /> coloration.</p>