Crystal Growth & Design · 2009 · 45 citations · 12 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsPhysical ChemistrySolid State PhysicsCrystal ChemistryPhase ChangePhase EquilibriaPhase TransitionsSolid-state Phase TransitionsX-ray CrystallographyCo-crystal CharacterizationDeuteration ChemistryHigh-temperature Phase RelationsHydrogen Bonding EffectsHydrogen Bonding In CrystalsIsotopic Substitution EffectsPhase Transitions In Dielectric CeramicsTemperature Effects On Phase Behavior
Variable-temperature single-crystal X-ray diffraction, DSC (differential scanning calorimetry), and dielectric measurements show that the co-crystal system (D-HMTA)(DNBA)(0.5D 2 O) ( 1 ) (HMTA = hexamethylenetetramine, H-DNBA = 3,5-dinitrobenzoic acid) easily undergoes phase transitions because the H-bonds (or D-bonds) in the high-temperature phase are on the average weaker than those in the low-temperature phase; the high-temperature phase also exhibits striking isotopic effects.
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