International Journal of Photoenergy / 2009 / Article / Fig 3

Research Article

Synthesis of Novel Iono- and Photochromic Spiropyrans Derived from 6,7-Dihydroxy-8-Formyl-4-Methyl-2H-Chromene-2-One

Figure 3

(a) NMR spectra of (4a) in dark conditions in C CN-nitrobenzene- ( v/v) and (b) in presence of Mg(Cl after 10 minutes; (c) 1 hour ( ).
238615.fig.003a
(a)
238615.fig.003b
(b)
238615.fig.003c
(c)

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