Table 2.

Water-exchange rates of complexes 12–42 discussed in section 2.2, determined from ¹⁷O-NMR spectroscopy and CEST spectra for Gd^III- and Eu^III-containing complexes, respectively.

Complex	kex (×106 s−1)	LnIII ion	Reference
12	1.9	GdIII	[39]
13	1.3	GdIII	[39]
14	0.85 (37 °C)	GdIII	[38]
15	0.77	GdIII	[40]
16	0.16	GdIII	[40]
17	0.038	GdIII	[40]
18	80	GdIII	[41]
19	20	GdIII	[41]
20	4.4	GdIII	[41]
21	78.7	GdIII	[42]
22	0.457	GdIII	[42]
23	0.98	GdIII	[43]
24	0.60	GdIII	[43]
25	14.1	GdIII	[44]
26	6.29	GdIII	[44]
27	17.6	GdIII	[45]
28	7.4	GdIII	[45]
29	1.7	GdIII	[46]
30	0.66	GdIII	[46]
31	0.0069	EuIII	[47]
32	0.0051	EuIII	[47]
33	0.0037	EuIII	[47]
34	0.0033	EuIII	[47]
35	0.0031	EuIII	[47]
36	0.0028	EuIII	[47]
37	0.018	EuIII	[48]
38	0.012	EuIII	[48]
39	0.005	EuIII	[48]
40	0.00290	EuIII	[49]
41	0.00253	EuIII	[49]
42	0.00211	EuIII	[49]