Table 2. The effective magnetic moment (μ_eff) [9] of the four lanthanide ion complexes and the measured T₁ (sec) ± s.d. of bulk water in 20 mM samples of LnDOTA-(gly)₄ ⁻.

Ln	μeff	Bulk water T1 (sec) of Ln-1	CEST (%)1-(Mon/Moff)
Yb	4.5	1.86±0.01	49
Tm	7.6	0.53±0.01	25
Dy	10.6	0.24±0.01	15
Tb	9.7	0.25±0.01	17

All data were collected at 9.4 T, 310 K on samples adjusted to pH 7.5.