Abstract
An organic salt composed of 4,4′-dinitro-2,2′,6,6′-tetracarboxybiphenyl and acridine has been shown to act as host to accommodate large polyaromatic guest molecules. Carboxylate–pyridinium hydrogen bonds, π–π and cation···π interactions are found to play a pivotal role in these host–guest complexes. All the complexes are found to exhibit distinct colors and photoluminescence which correlate with the charge-transfer interactions between acridinium ion and guest molecules, and ionization potential or donor ability of the guest molecules.
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