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. Author manuscript; available in PMC: 2021 May 11.
Published in final edited form as: Inorg Chem. 2020 Mar 27;59(7):5116–5132. doi: 10.1021/acs.inorgchem.0c00372

Table 1.

Protonation Constants of OxyMepa, Oxyaapa, Octapa, OBETA and Stability Constants of their Lanthanide Complexes.a

OxyMepa Oxyaapa Octapa OBETA
log K1 8.72(1) 8.47(4) 8.52b, 8.58c 9.34e
log K2 7.81(2) 7.63(2) 5.40b, 5.43c 8.62e
log K3 3.09(2) 3.66(4) 3.65b, 3.75c 3.19e
log K4 2.35(4) 2.90(1) 2.97b, 3.08c 2.19e
log K5 1.77(12) 1.66b, 2.21c 1.77e
log KLaL 9.93(3) 19.06(5) 20.13b 16.89e
log KCeL 10.74(1) 17.34f
log KPrL 11.25(3)
log KNdL 11.49(1) 19.77(7) 18.39e
log KSmL 12.13(2) 20.20c 19.02f
log KEuL 12.15(2) 19.13f
log KGdL 12.02(1) 20.50(2) 20.23b 19.37f
log KTbL 12.17(3)
log KDyL 12.18(1) 20.35c 18.87f
log KHoL 12.10(4) 18.93e
log KErL 12.00(3) 21.33(7) 18.46f
log KTmL 12.05(1) 18.31f
log KYbL 12.14(2) 20.10c
log KLuL 12.21(1) 21.49(4) 20.49b, 20.08d 17.93e
a

The values in the parentheses are one standard deviation of the last significant figure.

b

0.15 M NaCl, ref 60.

c

0.16 M NaCl, ref 61.

d

0.15 M NaCl, ref 17.

e

0.1 M KCl, ref 28.

f

0.1 M KCl, ref 29.