Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy

NaClO 4 -based molecular perovskite (H 2 dabco)[Na(ClO 4 ) 3 ] combined with the inorganic oxidizer and organic fuel was prepared by molecular assembly strategy. The high-yield samples were obtained by the one-pot reaction of NaClO 4 , HClO 4 , and triethylenediamine (dabco). The thermal analysis results showed molecular perovskite (H 2 dabco)[Na(ClO 4 ) 3 ] with ABX 3 -type closely ternary molecular stacking structure had a lower decomposition temperature (381.7 °C) and a higher heat release (2770 J/g) than NaClO 4 (569.2 °C and 353 J/g). The apparent activation energy of thermal decomposition process was reduced by 25 kJ/mol from 184.8 kJ/mol of NaClO 4 to 159.8 kJ/mol of (H 2 dabco)[Na(ClO 4 ) 3 ]. A synergistic catalysis thermal decomposition mechanism was proposed. The H 2 dabco 2+ from the unique ternary molecular perovskite structure can be favorable for proton excitation under thermal stimuli, and promote the formation of HClO 4 and superoxide radical anions ·O 2 − further, resulted in the redox thermal decomposition reaction between oxidizer ClO 4 − and fuel dabco more completely.