A carboxylatopillar[5]arene-based pH-triggering supramolecular photosensitizer for enhanced photodynamic antibacterial efficacy

A pH-triggering supramolecular antibacterial photosensitizer, constructed by host-guest interaction between porphyrin photosensitizer and carboxylatopillar[5]arene, not only improves the biocompatibility of the photosensitizer, but also enhances antibacterial efficacy under the low pH bacterial microenvironment.