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. Author manuscript; available in PMC: 2012 Sep 5.
Published in final edited form as: Inorg Chem. 2011 Aug 5;50(17):7966–7979. doi: 10.1021/ic2012843

Table 7.

Stability Constants (log KML) of the Ce3+, Gd3+, Yb3+, and Lu3+ Chelates of S-RRRR-NB-DOTMA (SAP), S-SSS-1 (TSAP), DOTA, and NB-DOTA (I = 1.0 M KCl, 25 °C)

Ln3+ S-RRRR-NB-DOTMA S-SSS-1 DOTAa NB-DOTAb
Ce3+ 19.79 (0.06) 24.04 (0.07) 23.4
Gd3+ 23.86 (0.07) 21.53 (0.11) 24.7 24.2
Yb3+ 24.12 (0.09) 21.91 (0.08) 25.0
Lu3+ 24.5
pGd 19.51 16.02 19.01 19.88
a

From ref 25.

b

From ref 21, data recorded with I = 1.0 M NMe4Cl.