Theoretical and Experimental Study of New Photochromic Bis-Spiropyrans with Hydroxyethyl and Carboxyethyl Substituents

<table>Structural properties of merocyanine isomer (<b>2a</b>)TTC-SP, oxazolidine form (<b>2a</b>)TTC-SP-ox, (<b>2a</b>)TTC-TTC, and oxazolidine form (<b>2a</b>)TTC-TTC-ox calculated at the CPCM/PBE0/6-311G** level of theory (toluene solutions).</table>

International Journal of Photoenergy

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Figure 4

Figure 4: Theoretical and Experimental Study of New Photochromic Bis-Spiropyrans with Hydroxyethyl and Carboxyethyl Substituents 