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Imidazolium-benzene derived multivalent di-, tri-, tetra-, and hexa- imidazolium bistriflimide fillers. (i) K2CO3, CuSO4 ·5 H2O, NMP [150 °C, 24 h]; (ii) NaH, THF/DMF [65 °C, N2, 2 h]; (iii) MeI, DMF [80 °C, 16 h]; (iv) LiTf2N, H2O (RT, 2 h).
