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Comparative Thermal Research on Energetic Molecular Perovskite Structures.

Authors :: Zhou, Jing
Zhang, Junlin
Chen, Shaoli
Zhao, Fengqi
Qiu, Lili
Meng, Zihui
Ding, Li
Wang, Bozhou
Pan, Qing
Source :: Molecules; Feb2022, Vol. 27 Issue 3, p805, 1p
Publication Year :: 2022
Abstract: Molecular perovskites are promising practicable energetic materials with easy access and outstanding performances. Herein, we reported the first comparative thermal research on energetic molecular perovskite structures of (C<subscript>6</subscript>H<subscript>14</subscript>N<subscript>2</subscript>)[NH<subscript>4</subscript>(ClO<subscript>4</subscript>)<subscript>3</subscript>], (C<subscript>6</subscript>H<subscript>14</subscript>N<subscript>2</subscript>)[Na(ClO<subscript>4</subscript>)<subscript>3</subscript>], and (C<subscript>6</subscript>H<subscript>14</subscript>ON<subscript>2</subscript>)[NH<subscript>4</subscript>(ClO<subscript>4</subscript>)<subscript>3</subscript>] through both calculation and experimental methods with different heating rates such as 2, 5, 10, and 20 °C/min. The peak temperature of thermal decompositions of (C<subscript>6</subscript>H<subscript>14</subscript>ON<subscript>2</subscript>)[NH<subscript>4</subscript>(ClO<subscript>4</subscript>)<subscript>3</subscript>] and (C<subscript>6</subscript>H<subscript>14</subscript>N<subscript>2</subscript>) [Na(ClO<subscript>4</subscript>)<subscript>3</subscript>] were 384 and 354 °C at the heating rate of 10 °C/min, which are lower than that of (C<subscript>6</subscript>H<subscript>14</subscript>N<subscript>2</subscript>)[NH<subscript>4</subscript>(ClO<subscript>4</subscript>)<subscript>3</subscript>] (401 °C). The choice of organic component with larger molecular volume, as well as the replacement of ammonium cation by alkali cation weakened the cubic cage skeletons; meanwhile, corresponding kinetic parameters were calculated with thermokinetics software. The synergistic catalysis thermal decomposition mechanisms of the molecular perovskites were also investigated based on condensed-phase thermolysis/Fourier-transform infrared spectroscopy method and DSC-TG-FTIR-MS quadruple technology at different temperatures. [ABSTRACT FROM AUTHOR]