Control of Luminescence Properties in Naphthalene Diimide-Based Gel with Azodibenzoic Acid by Charge Transfer Interaction

In recent years, the self-assembly of various organic π-systems, mediated by non-covalent bonding, have been topics of considerable interest.1 These compounds that can undergo gelation hold great promise as building blocks for materials that can be applied in the construction of opto-electronic devices.2,3 The self-sorting between aromatic compounds that can serve as electron donors and electron acceptors allows the formation of distinct p- and n-type bundles of fibers that further intermix and generate multiple junction points for efficient electron transfer and transport of the charge carriers. However, a difficulty associated with simple mixing of such compounds is the possibility of a different mode of assembly, i.e., charge-transfer interaction mediated by alternate donor–acceptor stacking. Thus, ex-amples related to self-sorting among donor–acceptor chromo