Three salts constructed by 5-amino-2,4,6-triiodoisophthalic acid(ATIPA) with N-heterocycles aromatic coformers such as pyridine tetrazolium,tetramethylpyrazine and cyanuric acid were synthesized by slowing evaporation of solvent.X-Ray single crystal analysis shows that hydrogen protons of the carboxyl groups transfer to nitrogen atoms of the N-heterocyclic coformers to form N —H… O hydrogen bonds in all the three compounds.A huge amount of H-bonds play significant role in the construction of these compounds and all of them generate 3D structures through strong O—H… N,O— H… O,N— H …O and weak C--H… O hydrogen bonds.Moreover,solvent water molecules are indispensable in the formation of compounds 1 and 3,which constitutes different supramolecular synthons to bridge individual molecules and chains to form stable structures.In addition,these crystal structures were further characterized by thermogravimetric analysis and infrared spectroscopy.