Table 2.

Excited state lifetime (τ, ms), hydration number (q), spin-lattice (r₁, mM⁻¹s⁻¹), and spin-spin (r_2, mM⁻¹s⁻¹) relaxivity values of PSS-[Gd(Eu)(TTA)₃·1], PSS-Na[Gd(Tb)·2] colloids.

	τ H2O, ms	τ D2O, ms	q (±0.5)	r1, mM−1s−1	r2, mM−1s−1
PSS-[Gd(Eu)(TTA)3·1]	0.398 ± 0.001	0.545 ± 0.001	0.71	2.82 ± 0.11	3.95 ± 0.13
PSS-Na[Gd(Tb)·2]	0.331 ± 0.001	0.419 ± 0.003	2.65	12.41 ± 0.16	14.36 ± 0.15