Thermodynamic Studies of Two Different Inclusion Compounds with the Same Guest: Toward a General Understanding of Melting Behavior in Binary Compounds
Melting behaviors of the hexadecane channel inclusion compounds of urea and of perhydrotriphenylene (PHTP) have been investigated by differential scanning calorimetry and hot-stage microscopy. Urea−hexadecane melts incongruently to give solid urea and liquid hexadecane, whereas PHTP−hexadecane melts...
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Published in | Chemistry of materials Vol. 10; no. 3; pp. 833 - 839 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
16.03.1998
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Subjects | |
Online Access | Get full text |
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Summary: | Melting behaviors of the hexadecane channel inclusion compounds of urea and of perhydrotriphenylene (PHTP) have been investigated by differential scanning calorimetry and hot-stage microscopy. Urea−hexadecane melts incongruently to give solid urea and liquid hexadecane, whereas PHTP−hexadecane melts congruently, i.e., giving liquid directly. Through examination of Gibbs energies, determined from adiabatic calorimetry, it is concluded that both inclusion compounds are stable with respect to their components, and melting behavior can be considered to be dictated by the stability of the host lattice at the melting point. Generalizations concerning factors influencing congruency of melting behavior in binary systems are presented. |
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Bibliography: | istex:2F8AEE9F3966CAA77B44EAE01A165979352CCB50 ark:/67375/TPS-XHKQBMSG-4 |
ISSN: | 0897-4756 1520-5002 |
DOI: | 10.1021/cm970578g |