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Accessing Electron-Deficient π-Extended Pyrenes via Non-K-Region Fusion
Sangram D Dongre1,2, Viksit Kumar1,2, Ravi Kumar2,3
1Organic Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India.
None:
This study presents a new class of pyrene derivatives featuring non-K-region fusion and electron-deficient π-extension. By strategically introducing electron-withdrawing groups at the non-K positions, the optical and redox properties of these compounds were significantly altered. For the first time, we report a non-K-region fused acceptor pyrene with an extended π-skeleton. The detailed characterizations revealed pronounced shifts in both absorption and emission spectra, accompanied by a significant lowering of the LUMO energy levels. Our results highlight non-K region-fused pyrenes as a promising building block for next-generation organic semiconductors with tunable electronic properties.
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