Progressive acylation of pyrene engineers solid state packing and colour via C–H⋯H–C, C–H⋯O and π–π interactions

Abstract

Quantum theory of atoms-in-molecules and Hirshfeld surface analyses indicated an increase in the extent of (i) C–H⋯H–C; (ii) C–H⋯O, (iii) π–π interactions and a decrease in the extent of (i) σ–π interaction, (ii) an interplanar angle between the vicinal pyrene units in a series of acetylpyrene derivatives offering blue–green–orange emissive crystals.