TABLE 1.

Chemical structures of ferrocene core and derivatives

	R1	R2
F	-H	-H
F1	-CH2OH	-H
F2	$-{\mathrm{CH}}_2\mathrm{NH}{\left({\mathrm{CH}}_3\right)}_2^{+}$	-H
F3	$-{\mathrm{CH}}_2\mathrm{N}{\left({\mathrm{CH}}_3\right)}_3^{+}$	-H
F4	-CH2N(CH3)2(CH2)3Br+	-H
F5	-COO-	-H
F6	$-{\mathrm{CH}}_2\mathrm{N}{\left({\mathrm{CH}}_3\right)}_3^{+}$	$-{\mathrm{CH}}_2\mathrm{N}{\left({\mathrm{CH}}_3\right)}_3^{+}$