Controlling the Photophysics of Aromatic Guests Using a Cyclic Porphyrin Dimer: Synthesis, Structure, and Encapsulation‐Mediated “ON‐OFF” Switch

A cyclic zinc(II) porphyrin dimer with flexible linkers has been employed as an artificial molecular container that can efficiently encapsulate aromatic guests (pyrene/anthracene) through π–π interactions. Such molecular entrapment inside the container completely alters the photophysical pathways of the encapsulated guests that are normally favored in solution. As a consequence, the exciplex emission (in case of pyrene), and photodimerization...