Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Crystalline anhydrous alpha,alpha-trehalose (polymorph beta) and crystalline dihydrate alpha,alpha-trehalose: A calorimetric study

Pinto, S. S.[Susana S.], Diogo, H. P.[Herminio P.], Moura Ramos, J. J.[Joaquim J.]
J. Chem. Thermodyn. 2006, 38, 9, 1130-1138
ABSTRACT
The mean values of the standard massic energy of combustion of crystalline anhydrous a,a-trehalose (C12H22O11, polymorph ss) and crystalline dihydrate a,a-trehalose (C12H26O13) measured by static-bomb combustion calorimetry in oxygen, at the temperature T = 298.15 K, are Dcu = -(16434.05 +- 4.50) J * g-1 and Dcu = -(14816.05 +- 3.52) J * g-1, respectively. The values of the standard enthalpies of formation obtained in this work, together with data on enthalpies of solution at infinite dilution (DsolH8) for crystalline dihydrate and amorphous anhydrous trehalose, allow a better insight on the thermodynamic description of the trehalose system which can provide, together with the future research on the subject, a contribution for understanding the metabolism in several organisms, as well as the phase transition between the different polymorphs.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 H2O water
3 O2 oxygen
4 C12H22O11 .alpha.-trehalose
5 C12H26O13 D-(+)-trehalose dihydrate
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 4
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DSC
  • 1
  • POMD
  • 4
  • Triple point temperature, K ; Glass
  • Glass
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 4
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 5
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DSC
  • 1
  • POMD
  • 5
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • RXND
  • 5
  • 1
  • 2
  • 3
  • Specific internal energy of reaction at constant volume, J/g
  • Static bomb calorimetry
  • 1
  • RXND
  • 4
  • 1
  • 2
  • 3
  • Specific internal energy of reaction at constant volume, J/g
  • Static bomb calorimetry
  • 1