TY - JOUR
T1 - The melting behavior of organic materials confined in porous solids
AU - Jackson, Catheryn L.
AU - McKenna, Gregory B.
PY - 1990
Y1 - 1990
N2 - The solid-liquid phase transition temperatures and heats of fusion ΔHf of nonpolar organic solids confined in the pores of controlled pore glasses were measured by differential scanning calorimetry. The pore diameters d were in the range of 40-730 Å and the organics studied were cis-decalin, trans-decalin, cyclohexane, benzene, chlorobenzene, naphthalene, and heptane. In accordance with previous reports on studies of primarily inorganic materials, the melting point of the pore solid T(d) decreased with decreasing pore diameter. In addition, a large reduction in the bulk enthalpy of fusion ΔHf of the pore solid was measured, which apparently has not been studied in detail by other workers. A linear correlation was found between the melting point depression (ΔT m) and the reciprocal diameter, as predicted by theories of solidification in a capillary. The calculated values of the solid-liquid interfacial energy σsl were in reasonable agreement with values reported in the literature based on other methods of measurement.
AB - The solid-liquid phase transition temperatures and heats of fusion ΔHf of nonpolar organic solids confined in the pores of controlled pore glasses were measured by differential scanning calorimetry. The pore diameters d were in the range of 40-730 Å and the organics studied were cis-decalin, trans-decalin, cyclohexane, benzene, chlorobenzene, naphthalene, and heptane. In accordance with previous reports on studies of primarily inorganic materials, the melting point of the pore solid T(d) decreased with decreasing pore diameter. In addition, a large reduction in the bulk enthalpy of fusion ΔHf of the pore solid was measured, which apparently has not been studied in detail by other workers. A linear correlation was found between the melting point depression (ΔT m) and the reciprocal diameter, as predicted by theories of solidification in a capillary. The calculated values of the solid-liquid interfacial energy σsl were in reasonable agreement with values reported in the literature based on other methods of measurement.
UR - http://www.scopus.com/inward/record.url?scp=36549101605&partnerID=8YFLogxK
U2 - 10.1063/1.459240
DO - 10.1063/1.459240
M3 - Article
AN - SCOPUS:36549101605
SN - 0021-9606
VL - 93
SP - 9002
EP - 9011
JO - The Journal of Chemical Physics
JF - The Journal of Chemical Physics
IS - 12
ER -