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. Author manuscript; available in PMC: 2011 Apr 21.
Published in final edited form as: Bioconjug Chem. 2010 Apr 21;21(4):610–615. doi: 10.1021/bc900375n

TABLE 1.

Relaxivity data of Gd3N@C80[DiPEG(OH)x] series. The relaxivities were measured at room temperature in water.

Mol. Weight of PEG Conc. Range (μM) r1 (0.35T) (mM−1s−1) r2 (0.35T) (mM−1s−1) r1 (2.4T) (mM−1s−1) r2 (2.4T) (mM−1s−1) r1 (9.4T) (mM−1s−1) r2 (9.4T) (mM−1s−1)
5000 0.4–6.5 107±8 127±36 139±6 221±11 52.5±2.4 186±12
5000(7) 1.6–12.6 102 144 143 222 32 137
2000 1.0–15.2 130±4 148±8 158±6 249±12 41.9±3.0 218±11
750 1.1–17.4 152±5 169±20 232±10 398±22 63.3±1.8 274±9
350 1.5–23.5 227±31 268±19 237±9 460±23 68.2±3.3 438±5