Phenyl-Linked Anthracene-Based Macrocycles with Geometrically Tunable Optical Properties

Abstract Anthracene has been widely explored because of its intrinsic photophysical and photochemical properties. Here, two novel anthracene-based macrocycles ( 1 and 2 ) were designed and synthesized with para - and meta -phenylene spacers. X-ray crystallographic analysis demonstrates that compound 1 with para -phenylene spacers adopts a nearly planar structure, while compound 2 with meta -phenylene spacers displays a V-shaped geometry. The photophysical properties of the resultant macrocycles, which are structural isomers, are well studied using photoluminescence spectra and time-resolved absorption spectra, which are further corroborated by density functional theory calculations. The optical properties of these two novel macrocycles can be finely tuned via their geometries.