Abstract
Bacterial pathogens remain major contributors to illnesses as they have developed several resistance mechanisms against standard treatments. Innovative porphyrin-quantum dots conjugated materials have great potential in addressing the limitations in the current disinfection methods. The antimicrobial activity of metal-free and In(III) derivative of 4-(15-(4-boronophenyl)-10,20-diphenylporphyrin-5-yl)benzoic acid conjugated to CuInS2/ZnS quantum dots is investigated in this study at laboratory-scale experiments under controllable conditions. The conjugate was also immobilized on mesoporous silica for recovery and reusability purposes. Findings of the study were driven by antimicrobial photodynamic inactivation (aPDI) in the presence of a porphyrin and quantum dots. POR(In)-CIS/ZnS QDs-Silica was the best performing conjugate with a singlet quantum yield (ΦΔ) of 0.72 and a log reduction of 9.38 and 9.76 against Escherichia coli and S. aureus, respectively.
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