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. 2007 Dec 6;7(12):3166–3178. doi: 10.3390/s7123166

Figure 5.

Figure 5.

Absorbance changes at 539 nm for spiropyran (1.0 × 10−5 mol/L, 298 K MeCN/H2O = 6:4, V/V) with irradiation for 10 min at 365 nm light in the presence of different concentrations of Al3+.