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

<table>Electronic absorption spectra of bis-spiropyran (<b>2b</b>) (acetonitrile solution) at the presence of different cations (<svg height="11.875" id="M43" style="vertical-align:-0.20474pt" version="1.1" viewbox="0 0 55.349998 11.875" width="55.349998" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> M.</table>

International Journal of Photoenergy

fig12

Figure 12

Figure 12: Theoretical and Experimental Study of New Photochromic Bis-Spiropyrans with Hydroxyethyl and Carboxyethyl Substituents 