Naphthalene Diimide Electronics and Organic Semiconductors

Naphthalene diimides (NDIs) are a class of rigid, aromatic diimide compounds distinguished by their strong electron-accepting character, thermal stability and structural versatility. Their planar π-conjugated core and tunable imide substituents enable precise control of frontier orbital energies, making them prototypical n-type semiconductors. In thin films and single crystals, NDIs exhibit efficient π-π stacking that supports high electron mobilities, while peripheral functionalisation can be used to direct self-assembly into ordered morphologies for field-effect transistors, organic photovoltaics and sensors. Recent efforts have focused on extending the NDI core, modifying imide side chains and introducing heteroatoms or thionation to optimise charge transport and environmental stability. Advances in supramolecular and polymeric architectures have further demonstrated continuous electron-transport pathways, long-lived charge-separated states and responsive behaviour under external stimuli. The global significance of NDI electronics lies in their potential for low-cost, flexible devices, sustainable energy conversion and adaptive molecular systems.

Research from Nature Portfolio

Recent studies have demonstrated controlled photoswitching of an azo-naphthalened­iimide via fluoride-mediated anion-π interactions. Binding of fluoride ions to the aromatic NDI core stabilises a rare cis configuration through a sandwich complex that generates and preserves radical-anion and dianionic species. The reversible switching between cis and trans forms is achieved by decomplexation of fluoride, while the photogenerated NDI–F–NDI assembly has been shown to degrade organic pollutants under mild conditions. This work establishes anion-π recognition as a powerful tool to modulate electronic states and responsive functions in NDI-based materials.

Naphthalene Diimide Electronics and Organic Semiconductors publication trend

The graph below shows the total number of articles in naphthalene diimide electronics and organic semiconductors across all publications each year (not limited to Nature Index journals).

Technical terms

n-type semiconductor: A material in which electrons are the dominant mobile charge carriers under an applied electric field.

LUMO: Lowest unoccupied molecular orbital; the first orbital to accept an electron during reduction, key to electron affinity.

π-π stacking: Attractive noncovalent interactions between adjacent aromatic planes, promoting ordered molecular packing and charge transport.

Anion-π interaction: A noncovalent attraction between an electron-rich anion and the π-electron cloud of an aromatic acceptor, used to stabilise charged states.

Charge carrier mobility: The measure of how rapidly electrons or holes can move through a semiconductor in response to an electric field.

Supramolecular polymer: A non-covalent network of monomers assembled by reversible secondary interactions, enabling dynamic electronic architectures.

References

1. Long-Lived Charge Carrier Photogeneration in a Cooperative Supramolecular Double-Cable Polymer. Journal of the American Chemical Society (2024).
2. Photomodulation of fluoride ion binding through anion-π interactions using a photoswitchable azobenzene system. Scientific Reports (2016).
3. Synthesis, Solution, and Solid State Properties of Homological Dialkylated Naphthalene Diimides—A Systematic Review of Molecules for Next-Generation Organic Electronics. Molecules (2023).