Photochemistry of Halogen-Bonded Complexes: Light-Initiated Electron Transfer from Halide Anions to Bromo-Substituted Electrophiles
Md Mahiuddin Sarker, Maison Hardin, Sergiy V. Rosokha · 2026
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Description
Md Mahiuddin Sarker and colleagues published a 2026 photochemistry study measuring how efficiently light triggers electron transfer inside halogen-bonded complexes, partnerships of a bromine molecule and a halide ion. These complexes absorb light through a charge-transfer band that can drive metal-free reactions, yet efficiency numbers were scarce. The team formed complexes from four bromine compounds and three halide donors, irradiated them at three ultraviolet wavelengths, and measured trihalide yields.
Quantum yields, the fraction of absorbed photons producing the reaction, ranged from about 0.2 to 0.8. Wavelength checks showed the reaction starts from the charge-transfer absorption rather than from exciting either partner alone. Stronger acceptors and stronger donors gave the higher yields, and those pairings absorb at lower energies, closer to visible light. The authors frame the results as design rules for greener photochemistry that might one day run on near-visible light.
Catalog record
| CREATOR | Md Mahiuddin Sarker, Maison Hardin, Sergiy V. Rosokha |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 31 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |