Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy

NaClO4-based molecular perovskite (H(2)dabco)[Na(ClO4)(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 NaClO4, HClO4, and triethylenediamine (dabco). The thermal analysis results showed molecular perovskite (H(2)dabco)[Na(ClO4)(3)] with ABX(3)-type closely ternary molecular stacking structure had a lower decomposition temperature (381.7 degrees C) and a higher heat release (2770 J/g) than NaClO4 (569.2 degrees 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 NaClO4 to 159.8 kJ/mol of (H(2)dabco)[Na(ClO4)(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 HClO4 and superoxide radical anions center dot O-2(-) further, resulted in the redox thermal decomposition reaction between oxidizer ClO4- and fuel dabco more completely.