10.1002/cplu.201900317
The research aims to design, synthesize, and characterize a new acceptor-donor-acceptor (AD-A) semiconductor, BDY-Ph-2T-Ph-BDY, which features a central phenyl-bithiophene-phenyl p-donor and BODIPY p-acceptor end-units. The purpose is to develop a solution-processable n-channel semiconductor with enhanced fluorescence emission for next-generation optoelectronics. The study concludes that BDY-Ph-2T-Ph-BDY exhibits an optical band gap of 2.32 eV, highly stabilized HOMO/LUMO energies (-5.74 eV/-3.42 eV), and a D-A dihedral angle of ~66°. It shows good fluorescence efficiency (FF = 0.30) and n-channel OFET transport characteristics (μe = 0.005 cm2/V·s; Ion/Ioff = 104-105), representing a significant improvement in fluorescence quantum yield compared to previous BODIPY semiconductors. This work demonstrates the potential of BDY-Ph-2T-Ph-BDY for high-performance optoelectronic applications. 4-Bromobenzaldehyde is used as a starting material to introduce the phenyl group into the BODIPY structure. N-Ethylpyrrole acts as a building block for the BODIPY core. P-Chloranil (2,3,5,6-Tetrachloro-1,4-benzoquinone) is used as an oxidizing agent in the synthesis process.
10.1039/c0ob00644k
The study presents an efficient one-pot synthesis method for highly functional alkenes through a phosphine-catalyzed tandem three-component reaction involving aldehydes, alkyl vinyl ketones, and amides. The process utilizes either EtPPh2 or PPh3 as catalysts and achieves high yields (68–99%) with excellent stereoselectivity (E/Z ratios up to 98:2) within a total reaction time of 3 to 29.5 hours. The study also explores the scope of the reaction with various aryl- and heteroaryl-substituted aldehydes, amides, and alkyl vinyl ketones, demonstrating the versatility and practicality of the method. The reaction mechanism is proposed to involve a Morita–Baylis–Hillman reaction followed by a Michael addition, leading to the formation of the desired alkenes. The mild reaction conditions and the high atom economy of the process make it a valuable addition to organic synthesis.
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