Thermodynamic phase transition triggered by distinct distortion and ordering of dipropylammonium picrate.
Chem Asian J
; 10(1): 247-51, 2015 Jan.
Article
in En
| MEDLINE
| ID: mdl-25339132
ABSTRACT
Dipropylammonium picrate (compoundâ
1) undergoes a first-order phase transition at 185.0â
K. Differential scanning calorimetry (DSC) measurements show reversible anomaly peaks with a thermal hysteresis of 10.2â
K. Dielectric responses with distinct anisotropy and striking anomaly further confirm the phase transition. Detailed structural analyses demonstrate that the phase transition in 1 is dominated by order-disorder transformations of the dipropylammonium (DPA) cations and the picrate anions. Moreover, the unique distortions of the terminal propyl moieties in the flexible chain-like DPA cation also play an important role in this structural phase transition. All these results indicate that 1 is a potential phase-transition material.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Chem Asian J
Year:
2015
Document type:
Article