Synthesis of Novel Oxazolidines and Study of Its Naked Eye CO₂ Detecting Properties.

Herewith, we synthesized the new oxazolidines (SP-1, SP-2 and SP-3) by without using any withdrawing or donating substitution, and for these molecules we demonstrated CO₂ sensing properties in naked eye condition with different colors (yellow and magenta). All the dyes showed different colors in the presence and absence of CO₂ in ethanol solution with the concept of ring closing and opening. In UV-visible absorption spectrum all the compounds showed visible light absorptions after purging of CO₂. To confirm this mechanism for SP-1 molecule case, we approached the