Benzothiadiazole-Based Organic Photonic Materials

Benzothiadiazole-based organic photonic materials represent a versatile class of π-conjugated molecules built around the electron-accepting benzothiadiazole core. When paired with suitable electron-donating units, these donor–acceptor architectures facilitate efficient intramolecular charge transfer, tunable optical band gaps and high fluorescence quantum yields. Synthetic modifications—such as halogenation, heterocycle fusion and incorporation of aryl linkers—have enabled precise control over absorption/emission wavelengths, photostability and charge-transport characteristics. These materials have found broad applications in organic light-emitting diodes (OLEDs), photovoltaic devices, chemical sensors and biological imaging probes. Advances in scalable cross-coupling methodologies and molecular design continue to drive their global significance in sustainable photonic technologies.

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Benzothiadiazole-Based Organic Photonic Materials publication trend

The graph below shows the total number of articles in benzothiadiazole-based organic photonic materials across all publications each year (not limited to Nature Index journals).

Technical terms

Donor–acceptor (D–A) system: A molecular arrangement combining electron-rich and electron-poor moieties to promote intramolecular charge transfer and modulate optical/electronic properties.

Photoluminescence quantum yield (PLQY): The ratio of emitted to absorbed photons in a luminescent material, indicating its efficiency as an emitter.

π-Conjugation: Overlap of p-orbitals across adjacent atoms, enabling delocalisation of electrons and influencing absorption/emission characteristics.

Intramolecular charge transfer (ICT): Movement of electronic charge within a molecule from donor to acceptor segments upon excitation, affecting wavelength and intensity of emission.

Suzuki–Miyaura cross-coupling: A palladium-catalysed reaction that forms carbon–carbon bonds between organoboron compounds and halogenated aromatics, widely used to build π-conjugated frameworks.

Buchwald–Hartwig cross-coupling: A palladium-catalysed amination method enabling the formation of C–N bonds, instrumental in installing donor or heterocyclic units onto benzothiadiazole cores.

References

1. Benzo[1,2-d:4,5-d′]bis([1,2,3]thiadiazole) and Its Bromo Derivatives: Molecular Structure and Reactivity. International Journal of Molecular Sciences (2023).
2. Synthesis of 5-(Aryl)amino-1,2,3-triazole-containing 2,1,3-Benzothiadiazoles via Azide–Nitrile Cycloaddition Followed by Buchwald–Hartwig Reaction. Molecules (2024).
3. Regioselective electrophilic aromatic borylation as a method for synthesising sterically hindered benzothiadiazole fluorophores. RSC Advances (2023).