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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Supramol Chem. 2013 Mar 12;25(6):315–322. doi: 10.1080/10610278.2013.776170

Figure 4.

Figure 4

(top) Absorption spectra of L3:2•Zn(NO3)2 complex (20 μM) showing complete conversion to L3 upon addition of two molar equivalents of EDTA in water/methanol (4:1 volume ratio). (a) L3:2•Zn(NO3)2 with no EDTA, (b) L3:2•Zn(NO3)2 plus 0.5 equiv. EDTA, (c) L3:2•Zn(NO3)2 plus 1.0 equiv. EDTA, (d) L3:2•Zn(NO3)2 plus 2.0 equiv. EDTA, (e) L3. (bottom) Absorption spectra of L3:2•Zn(NO3)2 complex (20 μM) in the presence of Na4PPi (40 μM) is unchanged by the addition of one hundred molar equivalents of EDTA in water/methanol (4:1 volume ratio). (a) L3:2•Zn(NO3)2 plus Na4PPi, (b) L3:2•Zn(NO3)2 plus Na4PPi and 100 equiv. EDTA, (c) L3.