Impurities in Commercial Phytantriol Significantly Alter Its Lyotropic Liquid-Crystalline Phase Behavior
The lyotropic liquid-crystalline phase behavior of phytantriol is receiving increasing interest in the literature as a result of similarities with glyceryl monooleate, despite its very different molecular structure. Some differences in the phase-transition temperature for the bicontinuous cubic to r...
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| Veröffentlicht in: | Langmuir 2008-07, Vol.24 (13), p.6998-7003 |
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| creator | Dong, Yao-Da Dong, Aurelia W Larson, Ian Rappolt, Michael Amenitsch, Heinz Hanley, Tracey Boyd, Ben J |
| description | The lyotropic liquid-crystalline phase behavior of phytantriol is receiving increasing interest in the literature as a result of similarities with glyceryl monooleate, despite its very different molecular structure. Some differences in the phase-transition temperature for the bicontinuous cubic to reverse hexagonal phase have been reported in the literature. In this study, we have investigated the influence that the commercial source and hence the purity has on the lyotropic phase behavior of phytantriol. Suppression of the phase-transition temperatures (by up to 15 °C for the bicontinuous cubic to reverse hexagonal phase transition) is apparent with lower-purity phytantriol. In addition, the composition boundaries were also found to depend significantly on the source and purity of phytantriol, with the bicontinuous cubic phase + excess water boundary occurring at a water content above that reported previously (i.e., >5% higher). Both the temperature and compositional changes in phase boundaries have significant implications on the use of these materials and highlight the impact that subtle levels of impurities can play in the phase behavior of these types of materials. |
| doi_str_mv | 10.1021/la8005579 |
| format | Article |
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Some differences in the phase-transition temperature for the bicontinuous cubic to reverse hexagonal phase have been reported in the literature. In this study, we have investigated the influence that the commercial source and hence the purity has on the lyotropic phase behavior of phytantriol. Suppression of the phase-transition temperatures (by up to 15 °C for the bicontinuous cubic to reverse hexagonal phase transition) is apparent with lower-purity phytantriol. In addition, the composition boundaries were also found to depend significantly on the source and purity of phytantriol, with the bicontinuous cubic phase + excess water boundary occurring at a water content above that reported previously (i.e., >5% higher). 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Dong, Aurelia W ; Larson, Ian ; Rappolt, Michael ; Amenitsch, Heinz ; Hanley, Tracey ; Boyd, Ben J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a447t-c52ca39890524f573d6e8bc07f649bfe9added041fd032c691f1952b31320e443</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Calorimetry, Differential Scanning</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Exact sciences and technology</topic><topic>Fatty Alcohols - chemistry</topic><topic>General and physical chemistry</topic><topic>Liquid Crystals - chemistry</topic><topic>Mass Spectrometry</topic><topic>Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites</topic><topic>Molecular Structure</topic><topic>Phase Transition</topic><topic>Surface physical chemistry</topic><topic>Temperature</topic><topic>Water - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dong, Yao-Da</creatorcontrib><creatorcontrib>Dong, Aurelia W</creatorcontrib><creatorcontrib>Larson, Ian</creatorcontrib><creatorcontrib>Rappolt, Michael</creatorcontrib><creatorcontrib>Amenitsch, Heinz</creatorcontrib><creatorcontrib>Hanley, Tracey</creatorcontrib><creatorcontrib>Boyd, Ben J</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dong, Yao-Da</au><au>Dong, Aurelia W</au><au>Larson, Ian</au><au>Rappolt, Michael</au><au>Amenitsch, Heinz</au><au>Hanley, Tracey</au><au>Boyd, Ben J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Impurities in Commercial Phytantriol Significantly Alter Its Lyotropic Liquid-Crystalline Phase Behavior</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2008-07-01</date><risdate>2008</risdate><volume>24</volume><issue>13</issue><spage>6998</spage><epage>7003</epage><pages>6998-7003</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>The lyotropic liquid-crystalline phase behavior of phytantriol is receiving increasing interest in the literature as a result of similarities with glyceryl monooleate, despite its very different molecular structure. Some differences in the phase-transition temperature for the bicontinuous cubic to reverse hexagonal phase have been reported in the literature. In this study, we have investigated the influence that the commercial source and hence the purity has on the lyotropic phase behavior of phytantriol. Suppression of the phase-transition temperatures (by up to 15 °C for the bicontinuous cubic to reverse hexagonal phase transition) is apparent with lower-purity phytantriol. In addition, the composition boundaries were also found to depend significantly on the source and purity of phytantriol, with the bicontinuous cubic phase + excess water boundary occurring at a water content above that reported previously (i.e., >5% higher). Both the temperature and compositional changes in phase boundaries have significant implications on the use of these materials and highlight the impact that subtle levels of impurities can play in the phase behavior of these types of materials.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>18522450</pmid><doi>10.1021/la8005579</doi><tpages>6</tpages></addata></record> |
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| subjects | Calorimetry, Differential Scanning Chemistry Colloidal state and disperse state Exact sciences and technology Fatty Alcohols - chemistry General and physical chemistry Liquid Crystals - chemistry Mass Spectrometry Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites Molecular Structure Phase Transition Surface physical chemistry Temperature Water - chemistry |
| title | Impurities in Commercial Phytantriol Significantly Alter Its Lyotropic Liquid-Crystalline Phase Behavior |
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