Toward Understanding the Origin of Structural Phase Transition in Guanidinium Pyridinium 1,5-Naphthalenedisulfonate
Chao ShiOrdered Matter Science Research
Center, Southeast University, Nanjing 211189, P. R. ChinaBin WeiOrdered Matter Science Research
Center, Southeast University, Nanjing 211189, P. R. ChinaWen ZhangOrdered Matter Science Research
Center, Southeast University, Nanjing 211189, P. R. China
2014en
ABI
Abstract
A phase transition compound 9PY was screened from a series of organic salts (Cat)·G·NDS, where the Cat is protonated amine or N-containing heterocycle (Cat = methylammonium, 1MA; ethylammonium, 2EA; propylammonium, 3PA; dimethylammonium, 4DMA; isopropylammonium, 5iPA; tert-butylammonium, 6tBA; imidazolium, 7IM; pyrazolium, 8PZ; pyridinium, 9PY; 2-methylimidazolium, 10MIM; 2-ethylimidazolium, 11EIM; (R,S)-3-methylpiperidium, 12MP), the G is guanidinium, and the NDS is 1,5-naphthalenedisulfonate. Detailed crystal structural analysis of 9PY shows the competing hydrogen-bonding interactions among the pyridinium and sulfonates are the driving force for the structural phase transition at 211 K.
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