International Journal of Photoenergy / 2009 / Article / Tab 2

Research Article

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

Table 2

Spectral characteristics of isomers A, B for (4a–f) and lifetimes for photoinduced absorption in toluene at 293 K.

Comp. , (nm) , (nm) , s

4a295, 354, 370458, 614161
4b298, 355, 371459, 617205.7
4c294, 354sh, 370456, 619170.9
4d295, 354, 370461, 61744.1
4e299, 356, 370459, 614257.7
4f299, 355sh, 371471, 6536.5

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