Synthesis and Properties of 2-(2-Pyridyl)-1-azaazulene
نویسندگان
چکیده
The title azaazulene 3 was synthesized either by reaction of tropone with N-{(2-pyridyl)acetyl}pyridinium iodide in the presence of ammonium acetate or by palladium-catalyzed cross-couplings between 2-halo-1-azaazulene and 2-substituted pyridine. The compound shows relatively stronger basicity compared with 2,2’-bipyridyl. While 3 showed no emission from the S1 state but from the S2 state like azulene does, the diprotonated species of 3, generated in 50% H2SO4, exhibited emission from the S1 state. Cationic metal-dependent absorption and emission were also studied.
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