Фазові перетворення в деяких аліфатичних молекулярних кристалах в умовах обмеженого простору
Phase transformations of nanostructured 1-octadecene and 10-undecylenic acid were studied by thermophysical methods, FTIR spectroscopy and X-ray diffraction. It was shown that bulk as well as nanostructured 1-octadecene crystallizes in orthorhombic unit cell. However, the unit cells of 10-undecyleni...
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| Datum: | 2011 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | Ukrainisch |
| Veröffentlicht: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2011
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| Online Zugang: | https://www.cpts.com.ua/index.php/cpts/article/view/82 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Zusammenfassung: | Phase transformations of nanostructured 1-octadecene and 10-undecylenic acid were studied by thermophysical methods, FTIR spectroscopy and X-ray diffraction. It was shown that bulk as well as nanostructured 1-octadecene crystallizes in orthorhombic unit cell. However, the unit cells of 10-undecylenic acid in bulk and inside the porous silicon are differen, but with the same large period of the pattern. The transition between orthorhombic crystalline and orthorhombic rotation-crystalline phases in boundary layer takes place at -60oC for nanostructured 1?octadecene and at -95oC for nanostructured 10-undecylenic acid. At the same time, the melting temperatures decrease in the confined media comparing to bulk for both substances (?Т = 11°C and ?Т = 19°C, respectively). |
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