Fig. 1. In situ FT-IR studies. Irradiation of a solution containing NBu4PA (5) (75 mM), 2a (75 mM) and 4CzBnBN (3.75 mM) in dry DMA lead to the formation of CO2 (2338 cm–1) and the depletion of 2a (1722 cm–1).
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