Energetic bridged triiodopyrazoles and triiodoimidazoles were designed and synthsized by reacting potassium triiodopyrazolate or triiodoimidazolate with corresponding dichloro compounds. All compounds were fully characterized by H-1 and C-13 NMR spectroscopy, IR spectroscopy, and elemental analyses. The structure of compound 1 was further confirmed by single-crystal X-ray diffraction. All of the compounds exhibit good thermal stability with decomposition temperatures between 199 and 270 degrees C and high densities ranging from 2.804 to 3.358 g/cm(3). The detonation performances and the detonation products were calculated by CHEETAH 7. Compound 3 (D-v = 4765 m s(-1); P = 17.9 GPa) and compound 7 (D-v = 4841 m s(-1); P = 18.5 GPa) show comparable detonation pressure to TNT, and high iodine content makes them promising as energy and biocides storage compounds.