Solid-state phase transitions of 4-methylanilinium perchlorate (4-CH3C6H4NH3·ClO4, 1) and tetrafluoroborate (4-CH3C6H4-NH3·BF4, 2) were investigated with variable-temperature X-ray single-crystal structure analysis and thermal studies. Both 1 and 2 undergo first-order phase transitions and exhibit distinct dielectric anomalies at 385 and 247 K, respectively.
Keywords organic-inorganic hybrid compounds – dielectricity – phase transition – crystal structure – switchable molecular dielectrics