. Author manuscript; available in PMC: 2012 Dec 21.

Published in final edited form as: Inorg Chem. 2011 May 6;50(11):4857–4867. doi: 10.1021/ic200075w

Table 2.

Dissociation constants of Eu(S-THP) and Eu(THPC) anion complexes.

Complex	Anions	K_d (mM) emission	K_d (mM) excitation
	Phosphate^a	0.3, 3.0	0.3
Eu(S-THP)	MMP^a	0.7, 9.8	1.8
	Carbonate^b	33	38
	Acetate^b	14	33
	L-lactate^b	13	19
	Citrate^c	0.016	0.017
Eu(THPC)	Phosphate^a	-	4.2
	Citrate^a	-	0.21

Solutions contained 100 mM NaCl, 20 mM HEPES, pH 7.2. Eu(S-THP) concentrations were: (a) 0.100 mM, (b) 1.00 mM, (c) 25 μM. Eu(THPC) was 100 μM.