Research Article

Influence of Molecular Mobility on Contrast Efficiency of Branched Polyethylene Glycol Contrast Agent

Table 1

Summary of the synthesized PEG-Gd with different structures.

ProductMW (data sheet)Gd introduction ratio (Gd/PEG (mol/mol)) (ICP-MS)Zeta potential (mV)Hydrodynamic radius (nm)Yield (%)

8-arm (4.1)150004.07−0.222.9090.7
8-arm (3.7)150003.70−0.023.0574.9
8-arm (2.6)150002.64−0.022.2494.8
8-arm (1.8)150001.790.082.7097.2
4-arm (2.0)150001.970.044.0442.6
Dendron (0.7)400000.69−0.0811.7299.2
Linear (0.7)100000.70−1.734.0054.2
Magnescope559−0.110.99
ProHance5590.181.07