Fig. 2: Absorption and normalized fluorescence spectra of the bis-nitro-TAPPs.
From: Deciphering the unusual fluorescence in weakly coupled bis-nitro-pyrrolo[3,2-b]pyrroles
a–f experimentally recorded for solvents with different polarity; g, h experimentally recorded for sucrose octaacetate (SOA) vs. ethyl acetate (EtOAc); and i–k calculated for the gas phase, using TD-DFT. The solid lines represent the absorption spectra; and the dotted lines—the fluorescence spectra. For 1p, λex = 460 nm for C6H12 and CCl4, and λex = 464 nm for the rest of the solvents; for 1m, λex = 347 nm; for 2p, λex = 440 nm; and for 2m and 2o, λex = 373 nm.
