Abstract:2‐Methyl‐6‐arylimidazo[1,2‐a]pyrazin‐3(7H)‐ones with a substituent such as phenyl, 4‐methoxyphenyl or 4‐trifluoromethoxyphenyl at the 6‐position of the imidazo[1,2‐a]pyrazin‐3(7H)‐one ring system, produced chemiluminescence emission in mixtures of water and DMF and in several mixtures of MeOH and DMF under neutral conditions. Under these protic luminescence conditions, the respective light emissions were generated from neutral singlet excited‐state molecules. The electron‐donating effect of the 4‐methoxy subst… Show more
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