Table 1. Experimental Relaxivities, r₁, and Calculated Parameters Characterizing the Water Exchange and the Rotational Dynamics of Gd-1 in an Aggregated State and the Small Molecular Weight Reference Compound GdDOTA.

	Gd-1a	GdDOTAb
r1 (20 MHz, 37 °C) [mM–1 s–1]	15.46	3.83
kex298 [s–1]	(8.1 ± 0.5) × 106	4.1 × 106
ΔH‡ [kJ/mol]	27.5 ± 0.5	49.8
τR [ps]	850 ± 35 (from NMRD)	77
	930 ± 28 (from 17O NMR)
ER/kJ/mol	28.1 ± 0.5	16.1

^aThis work.

^bRef (38).