Baso-chromic spiropyrrolizine: The spiromerocyanine isomerization and alkaline detection

摘要

A novel baso-chromic spiropyrrolizine displaying isomerization between the spiro and the merocyanine isomer have been designed. The baso-chromic behavior shows that the baso-cyclization is induced by organic/inorgainc base, affording the ring-closed isomer. In this process, base condition not only controls the formation of spiroisomer, but also it induces dramatic changes in both absorption and emission. It was evidenced by H-1 NMR and DFT calculation to show the present of pyrrolizine.

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