A series of 6 multisubstituted pyridine salts are disclosed, which are iodized N-methyl-2,4,6-tri[(CE)-2-(4-ferrocenylphenyl)vinyl] pyridine salt, iodized N-methyl-2,6-bis[(E)-2-(4-ferrocenylhenyl) vinyl] pyridine salt, iodized N-methyl-2,4,6-tri[(1E,3E)-4-ferrocenyl- 1,3-butadienyl] pyridine salt, iodized N-methyl-2,6-bis[(1E,3E) -4-ferrocenyl-1,3-butadienyl] pyridine salt, iodized N-methyl-2,4,6-tri[(1E,3E)-4-chloro-4-ferrocenyl-1,3-butadienyl] pyridine salt, and iodized N-methyl-2,6-bis[(1E,3E)-4-chloro-4-ferrocenyl-1,3-butadienyl] pyridine salt. Their preparing process are also disclosed.