Linear Alternating Supramolecular Photosensitizer for Enhanced Photodynamic Therapy.

Supramolecular polymers with facile and versatile architectures via noncovalent connection present great potential in biological fields. Herein, a linear alternating supramolecular polymer is constructed via host-guest inclusion interaction between cyclodextrin dimer (CD) and bifunctional adamantane-conjugated porphyrin (TPP-Ad). The supramolecular alternating structure of CD/TPP could not only suppress the aggregation of PSs to improve the photophysical properties because of the steric hindrance but also enhance the water solubility of PSs induced from cyclodextrin moieties. The nanoplatform obtained by this linear alternating supramolecular polymer (TPP-Ad/CD) presents significantly enhanced photodynamic therapy (PDT) efficacy, providing a promising path for PDT.