Induced vibrational circular dichroism and polymorphism of syndiotactic polystyrene
The intense circular dichroism (CD) phenomena, as induced in amorphous samples of syndiotactic polystyrene (s‐PS) by cocrystallization with nonracemic volatile guest molecules (carvone and limonene), have been investigated by Vibrational Circular Dichroism (VCD) measurements and X‐ray diffraction ch...
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Veröffentlicht in: | Chirality (New York, N.Y.) N.Y.), 2010, Vol.22 (Suppl. 1E), p.E67-E73 |
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creator | Rizzo, Paola Beltrani, Michela Guerra, Gaetano |
description | The intense circular dichroism (CD) phenomena, as induced in amorphous samples of syndiotactic polystyrene (s‐PS) by cocrystallization with nonracemic volatile guest molecules (carvone and limonene), have been investigated by Vibrational Circular Dichroism (VCD) measurements and X‐ray diffraction characterizations. Moreover, the stability of these CD phenomena after thermal and solvent treatments, leading to different polymorphic crystalline phases of s‐PS, has been studied. The CD phenomena remain stable not only after guest extraction but also after thermal annealing procedures leading to the helical γ phase or to the transplanar α phase. The CD phenomena are instead reduced for the solvent treatments involving at least partial dissolution and crystallization that lead to the helical ϵ phases and even lost for thermal treatments involving melting and crystallization that lead to the β phase. The reported results indicate that the intense CD phenomena observed for s‐PS films are due to a supramolecular chirality associated with the native cocrystal morphology. Chirality, 2010. © 2010 Wiley‐Liss, Inc. |
doi_str_mv | 10.1002/chir.20871 |
format | Article |
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Moreover, the stability of these CD phenomena after thermal and solvent treatments, leading to different polymorphic crystalline phases of s‐PS, has been studied. The CD phenomena remain stable not only after guest extraction but also after thermal annealing procedures leading to the helical γ phase or to the transplanar α phase. The CD phenomena are instead reduced for the solvent treatments involving at least partial dissolution and crystallization that lead to the helical ϵ phases and even lost for thermal treatments involving melting and crystallization that lead to the β phase. The reported results indicate that the intense CD phenomena observed for s‐PS films are due to a supramolecular chirality associated with the native cocrystal morphology. Chirality, 2010. © 2010 Wiley‐Liss, Inc.</description><identifier>ISSN: 0899-0042</identifier><identifier>ISSN: 1520-636X</identifier><identifier>EISSN: 1520-636X</identifier><identifier>DOI: 10.1002/chir.20871</identifier><identifier>PMID: 21038398</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Chirality ; Circularity ; cocrystalline phases ; Dichroism ; Heat treatment ; Helical ; nonracemic guest molecules ; Phases ; polymorphism ; Polystyrene resins ; Solvents ; syndiotactic polystyrene ; Syndiotacticity ; vibrational circular dichroism</subject><ispartof>Chirality (New York, N.Y.), 2010, Vol.22 (Suppl. 1E), p.E67-E73</ispartof><rights>Copyright © 2010 Wiley‐Liss, Inc.</rights><rights>2010 Wiley-Liss, Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5311-2702b88e70fb5a9ec704962c43806336adf576bb573ddf7cd64ab05165ca87383</citedby><cites>FETCH-LOGICAL-c5311-2702b88e70fb5a9ec704962c43806336adf576bb573ddf7cd64ab05165ca87383</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fchir.20871$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fchir.20871$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,4024,27923,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21038398$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Rizzo, Paola</creatorcontrib><creatorcontrib>Beltrani, Michela</creatorcontrib><creatorcontrib>Guerra, Gaetano</creatorcontrib><title>Induced vibrational circular dichroism and polymorphism of syndiotactic polystyrene</title><title>Chirality (New York, N.Y.)</title><addtitle>Chirality</addtitle><description>The intense circular dichroism (CD) phenomena, as induced in amorphous samples of syndiotactic polystyrene (s‐PS) by cocrystallization with nonracemic volatile guest molecules (carvone and limonene), have been investigated by Vibrational Circular Dichroism (VCD) measurements and X‐ray diffraction characterizations. Moreover, the stability of these CD phenomena after thermal and solvent treatments, leading to different polymorphic crystalline phases of s‐PS, has been studied. The CD phenomena remain stable not only after guest extraction but also after thermal annealing procedures leading to the helical γ phase or to the transplanar α phase. The CD phenomena are instead reduced for the solvent treatments involving at least partial dissolution and crystallization that lead to the helical ϵ phases and even lost for thermal treatments involving melting and crystallization that lead to the β phase. The reported results indicate that the intense CD phenomena observed for s‐PS films are due to a supramolecular chirality associated with the native cocrystal morphology. Chirality, 2010. © 2010 Wiley‐Liss, Inc.</description><subject>Chirality</subject><subject>Circularity</subject><subject>cocrystalline phases</subject><subject>Dichroism</subject><subject>Heat treatment</subject><subject>Helical</subject><subject>nonracemic guest molecules</subject><subject>Phases</subject><subject>polymorphism</subject><subject>Polystyrene resins</subject><subject>Solvents</subject><subject>syndiotactic polystyrene</subject><subject>Syndiotacticity</subject><subject>vibrational circular dichroism</subject><issn>0899-0042</issn><issn>1520-636X</issn><issn>1520-636X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqN0ctu1DAUBmALUdGhsOEBUHYgpJTju7NEEW0HtUXivrMc29EYknhqJ4W8PZlO22XVlSX7O7-s8yP0CsMxBiDv7SakYwJK4idohTmBUlDx6ylagaqqEoCRQ_Q8598AUAnKnqFDgoEqWqkV-roe3GS9K65Dk8wY4mC6woZkp86kwgW7STHkvjCDK7axm_uYtpvdRWyLPA8uxNHYMdibxzzOyQ_-BTpoTZf9y9vzCH0_-fitPivPP5-u6w_npeUU45JIII1SXkLbcFN5K4FVglhGFQhKhXEtl6JpuKTOtdI6wUwDHAtujZLL_4_Qm33uNsWryedR9yFb33Vm8HHKWgpKOGdSLvLtgxJLxuSyHlI9igopFX8sZZTyhb7bU5tizsm3eptCb9KsMehdiXpXor4pccGvb3Onpvfunt61tgC8B39D5-cHonR9tv5yF1ruZ0Ie_b_7GZP-aCGp5Prn5an-wS_Zp4u61pT-Bw6htb4</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>Rizzo, Paola</creator><creator>Beltrani, Michela</creator><creator>Guerra, Gaetano</creator><general>Wiley Subscription Services, Inc., A Wiley Company</general><scope>BSCLL</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>2010</creationdate><title>Induced vibrational circular dichroism and polymorphism of syndiotactic polystyrene</title><author>Rizzo, Paola ; Beltrani, Michela ; Guerra, Gaetano</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5311-2702b88e70fb5a9ec704962c43806336adf576bb573ddf7cd64ab05165ca87383</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Chirality</topic><topic>Circularity</topic><topic>cocrystalline phases</topic><topic>Dichroism</topic><topic>Heat treatment</topic><topic>Helical</topic><topic>nonracemic guest molecules</topic><topic>Phases</topic><topic>polymorphism</topic><topic>Polystyrene resins</topic><topic>Solvents</topic><topic>syndiotactic polystyrene</topic><topic>Syndiotacticity</topic><topic>vibrational circular dichroism</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rizzo, Paola</creatorcontrib><creatorcontrib>Beltrani, Michela</creatorcontrib><creatorcontrib>Guerra, Gaetano</creatorcontrib><collection>Istex</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Chirality (New York, N.Y.)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rizzo, Paola</au><au>Beltrani, Michela</au><au>Guerra, Gaetano</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Induced vibrational circular dichroism and polymorphism of syndiotactic polystyrene</atitle><jtitle>Chirality (New York, N.Y.)</jtitle><addtitle>Chirality</addtitle><date>2010</date><risdate>2010</risdate><volume>22</volume><issue>Suppl. 1E</issue><spage>E67</spage><epage>E73</epage><pages>E67-E73</pages><issn>0899-0042</issn><issn>1520-636X</issn><eissn>1520-636X</eissn><abstract>The intense circular dichroism (CD) phenomena, as induced in amorphous samples of syndiotactic polystyrene (s‐PS) by cocrystallization with nonracemic volatile guest molecules (carvone and limonene), have been investigated by Vibrational Circular Dichroism (VCD) measurements and X‐ray diffraction characterizations. Moreover, the stability of these CD phenomena after thermal and solvent treatments, leading to different polymorphic crystalline phases of s‐PS, has been studied. The CD phenomena remain stable not only after guest extraction but also after thermal annealing procedures leading to the helical γ phase or to the transplanar α phase. The CD phenomena are instead reduced for the solvent treatments involving at least partial dissolution and crystallization that lead to the helical ϵ phases and even lost for thermal treatments involving melting and crystallization that lead to the β phase. The reported results indicate that the intense CD phenomena observed for s‐PS films are due to a supramolecular chirality associated with the native cocrystal morphology. Chirality, 2010. © 2010 Wiley‐Liss, Inc.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><pmid>21038398</pmid><doi>10.1002/chir.20871</doi><tpages>7</tpages></addata></record> |
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subjects | Chirality Circularity cocrystalline phases Dichroism Heat treatment Helical nonracemic guest molecules Phases polymorphism Polystyrene resins Solvents syndiotactic polystyrene Syndiotacticity vibrational circular dichroism |
title | Induced vibrational circular dichroism and polymorphism of syndiotactic polystyrene |
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