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. 2012 May 8;12(5):5940–5950. doi: 10.3390/s120505940

Figure 3.

Figure 3.

Surfactant-mediated responses of solutions containing 4-CTAB towards various thiols at pH 7.4. (a) Absorption spectra of 4 (2.5 μM) upon addition of thiols (2 equiv) in 2.0 mM CTAB media buffered at pH 7.4 (phosphate buffer, 50 mM). The inset shows color changes of the solution of 4 (10 μM) upon addition of thiols (2 equiv) in 2.0 mM CTAB media buffered at pH 7.4 (phosphate buffer, 50 mM). The picture was taken immediately upon addition of CTAB; (b) Fluorescence spectra (λex = 565 nm) of 4 (2.5 μM) upon addition of thiols (2 equiv) in 2.0 mM CTAB media buffered at pH 7.4 (phosphate buffer, 50 mM). Spectra were taken immediately upon addition of CTAB. The inset shows time-dependent fluorescence changes (λem = 587 nm) of the same system. The legends in (a) correspond to (b) as well.