Design, Synthesis, Antibacterial Activity, and Printing Performance of a Novel Class of Neocryptolpine Azo Disperse Dyes

Our team created and produced an innovative range of bioactive disperse dyes, depending on the functionalizing neocryptolepines connected to an azo-benzene sulfonyl moiety using various diaminoalkyl linker chains. These types of dyes are successfully applied to the creation of pastes for silkscreen printing of polyester fabric. To ascertain the dye strength, polyester printed samples underwent testing for washing, rubbing, perspiration, sublimation, and light fastness. In addition, L^*, a^*, and b^* were used to evaluate the hue of the color dyes. Using the colony forming unit (CFU) method, the antibacterial activity of the printed polyester fabrics was assessed. The anti-gram positive actions of fabric samples treated with 6c and 6f against S. aureus were encouraging. In contrast, fabrics treated with 6b, 6d, and 6e showed only mild anti-gram negative activity against the test bacterium L. monocytogenes.