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. Author manuscript; available in PMC: 2016 Jan 7.
Published in final edited form as: Chemistry. 2014 Nov 7;21(2):867–874. doi: 10.1002/chem.201403479

Figure 5.

Figure 5

The absorption spectra of compounds a) 2 and b) 4 at 5 µm each in a 1:1 water/CH3CN mixture at pH 7.3 (HEPES 25 mm, NaCl 25 mm) acquired under irradiation from a handheld UV lamp (365 nm) for 1 min. The spectra were collected at 10 s increments. The changes of absorption spectra of c) 2 and d) 4 under the same conditions in the presence of ZnCl2 (100 µm).