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Photo-switching and nonlinear optical behaviors of center linked bent-core azobenzene liquid crystalline polymers
A new class of two series ( I and II ) of center linked bent-core azobenzene liquid crystalline polymers were prepared. They were prepared from two different spacer lengths (2 and 10) between polymer backbone and bent-core mesogen. The bent-core mesogen possesses photoactive linking group with varia...
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| Published in: | Journal of materials science 2011-08, Vol.46 (15), p.5029-5043 |
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| Main Authors: | , |
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| cites | cdi_FETCH-LOGICAL-c527t-a25b724c0f0a95afa4e8c43bcc68e7578b1bf6c1d8f5293b3e4f876f4175d5d53 |
| container_end_page | 5043 |
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| container_title | Journal of materials science |
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| creator | Vijay Srinivasan, M. Kannan, P. |
| description | A new class of two series (
I
and
II
) of center linked bent-core azobenzene liquid crystalline polymers were prepared. They were prepared from two different spacer lengths (2 and 10) between polymer backbone and bent-core mesogen. The bent-core mesogen possesses photoactive linking group with variable terminal chains (7, 8, and 9). The synthesized precursors, monomers, and polymers were characterized by FT-IR,
1
H NMR, and
13
C NMR spectroscopy. Thermal stability of polymers was examined by thermogravimetric analysis. The mesophase transition of monomers and polymers were observed through polarized optical microscopy, and confirmed by differential scanning calorimetry. Among the two series of polymers, the second series of polymers possesses liquid crystalline properties. The photo-switching properties of bent-core azo polymers were investigated using UV–Vis spectroscopy,
trans
to
cis
isomerization occurs around 35 s in chloroform and 65 s in thin film, where as reverse processes take place almost 32 h in chloroform. The photo-switching processes of polymer
IIa
precedes faster and also longer time thermally stable when compared with recently reported similar polymers. Negative optical nonlinear refractive index and optical limiting properties of the polymers were measured using Nd-YAG laser. |
| doi_str_mv | 10.1007/s10853-011-5423-x |
| format | article |
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I
and
II
) of center linked bent-core azobenzene liquid crystalline polymers were prepared. They were prepared from two different spacer lengths (2 and 10) between polymer backbone and bent-core mesogen. The bent-core mesogen possesses photoactive linking group with variable terminal chains (7, 8, and 9). The synthesized precursors, monomers, and polymers were characterized by FT-IR,
1
H NMR, and
13
C NMR spectroscopy. Thermal stability of polymers was examined by thermogravimetric analysis. The mesophase transition of monomers and polymers were observed through polarized optical microscopy, and confirmed by differential scanning calorimetry. Among the two series of polymers, the second series of polymers possesses liquid crystalline properties. The photo-switching properties of bent-core azo polymers were investigated using UV–Vis spectroscopy,
trans
to
cis
isomerization occurs around 35 s in chloroform and 65 s in thin film, where as reverse processes take place almost 32 h in chloroform. The photo-switching processes of polymer
IIa
precedes faster and also longer time thermally stable when compared with recently reported similar polymers. Negative optical nonlinear refractive index and optical limiting properties of the polymers were measured using Nd-YAG laser.</description><identifier>ISSN: 0022-2461</identifier><identifier>EISSN: 1573-4803</identifier><identifier>DOI: 10.1007/s10853-011-5423-x</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Azo compounds ; Azo polymers ; Backbone ; Calorimetry ; Characterization and Evaluation of Materials ; Chloroform ; Classical Mechanics ; Crystal structure ; Crystallinity ; Crystallography and Scattering Methods ; Infrared spectroscopy ; Isomerization ; Liquid crystal polymers ; Liquid crystals ; Materials Science ; Mesophase ; Monomers ; Neodymium lasers ; NMR spectroscopy ; Nonlinear optics ; Nonlinearity ; Nuclear magnetic resonance spectroscopy ; Optical microscopy ; Optical properties ; Polymer liquid crystals ; Polymer Sciences ; Polymers ; Prepolymers ; Refractivity ; Semiconductor lasers ; Solid Mechanics ; Spectrum analysis ; Stability analysis ; Switching ; Thermal stability ; Thermogravimetric analysis ; Thin films ; YAG lasers</subject><ispartof>Journal of materials science, 2011-08, Vol.46 (15), p.5029-5043</ispartof><rights>Springer Science+Business Media, LLC 2011</rights><rights>COPYRIGHT 2011 Springer</rights><rights>Springer Science+Business Media, LLC 2011.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c527t-a25b724c0f0a95afa4e8c43bcc68e7578b1bf6c1d8f5293b3e4f876f4175d5d53</citedby><cites>FETCH-LOGICAL-c527t-a25b724c0f0a95afa4e8c43bcc68e7578b1bf6c1d8f5293b3e4f876f4175d5d53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Vijay Srinivasan, M.</creatorcontrib><creatorcontrib>Kannan, P.</creatorcontrib><title>Photo-switching and nonlinear optical behaviors of center linked bent-core azobenzene liquid crystalline polymers</title><title>Journal of materials science</title><addtitle>J Mater Sci</addtitle><description>A new class of two series (
I
and
II
) of center linked bent-core azobenzene liquid crystalline polymers were prepared. They were prepared from two different spacer lengths (2 and 10) between polymer backbone and bent-core mesogen. The bent-core mesogen possesses photoactive linking group with variable terminal chains (7, 8, and 9). The synthesized precursors, monomers, and polymers were characterized by FT-IR,
1
H NMR, and
13
C NMR spectroscopy. Thermal stability of polymers was examined by thermogravimetric analysis. The mesophase transition of monomers and polymers were observed through polarized optical microscopy, and confirmed by differential scanning calorimetry. Among the two series of polymers, the second series of polymers possesses liquid crystalline properties. The photo-switching properties of bent-core azo polymers were investigated using UV–Vis spectroscopy,
trans
to
cis
isomerization occurs around 35 s in chloroform and 65 s in thin film, where as reverse processes take place almost 32 h in chloroform. The photo-switching processes of polymer
IIa
precedes faster and also longer time thermally stable when compared with recently reported similar polymers. Negative optical nonlinear refractive index and optical limiting properties of the polymers were measured using Nd-YAG laser.</description><subject>Azo compounds</subject><subject>Azo polymers</subject><subject>Backbone</subject><subject>Calorimetry</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chloroform</subject><subject>Classical Mechanics</subject><subject>Crystal structure</subject><subject>Crystallinity</subject><subject>Crystallography and Scattering Methods</subject><subject>Infrared spectroscopy</subject><subject>Isomerization</subject><subject>Liquid crystal polymers</subject><subject>Liquid crystals</subject><subject>Materials Science</subject><subject>Mesophase</subject><subject>Monomers</subject><subject>Neodymium lasers</subject><subject>NMR spectroscopy</subject><subject>Nonlinear optics</subject><subject>Nonlinearity</subject><subject>Nuclear magnetic resonance spectroscopy</subject><subject>Optical microscopy</subject><subject>Optical properties</subject><subject>Polymer liquid crystals</subject><subject>Polymer Sciences</subject><subject>Polymers</subject><subject>Prepolymers</subject><subject>Refractivity</subject><subject>Semiconductor lasers</subject><subject>Solid Mechanics</subject><subject>Spectrum analysis</subject><subject>Stability analysis</subject><subject>Switching</subject><subject>Thermal stability</subject><subject>Thermogravimetric analysis</subject><subject>Thin films</subject><subject>YAG lasers</subject><issn>0022-2461</issn><issn>1573-4803</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkktvEzEUhUcIJELhB7CzxAJYuPg5niyrqpRKlUA81pbHc524TOzE9kDSX1-PggRF4qG7sOz7nXNl-zTNc0pOKSHqTaakkxwTSrEUjOP9g2ZBpeJYdIQ_bBaEMIaZaOnj5knON4QQqRhdNLsP61gizt99sWsfVsiEAYUYRh_AJBS3xVszoh7W5puPKaPokIVQIKGKfIWhtkLBNiZA5jbWzS0EqL3d5Adk0yEXM85maBvHwwZSfto8cmbM8OzHetJ8eXvx-fwdvn5_eXV-do2tZKpgw2SvmLDEEbOUxhkBnRW8t7btQEnV9bR3raVD5yRb8p6DcJ1qnaBKDrX4SfPy6LtNcTdBLnrjs4VxNAHilPWStZxxrrpKvvorSVXLKOMtmU1f_IbexCmFeg_NmFwqzloxG54eqZUZQfvgYknG1hpg420M4Hw9P6vfwzopKflfgaBMyrbOqYLX9wSVKbAvKzPlrK8-fbxv_i_2V196ZG2KOSdwepv8xqSDpkTPQdPHoOkaND0HTe-rhh01ubJhBennm_xZdAftd9U6</recordid><startdate>20110801</startdate><enddate>20110801</enddate><creator>Vijay Srinivasan, M.</creator><creator>Kannan, P.</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ISR</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20110801</creationdate><title>Photo-switching and nonlinear optical behaviors of center linked bent-core azobenzene liquid crystalline polymers</title><author>Vijay Srinivasan, M. ; Kannan, P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c527t-a25b724c0f0a95afa4e8c43bcc68e7578b1bf6c1d8f5293b3e4f876f4175d5d53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Azo compounds</topic><topic>Azo polymers</topic><topic>Backbone</topic><topic>Calorimetry</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chloroform</topic><topic>Classical Mechanics</topic><topic>Crystal structure</topic><topic>Crystallinity</topic><topic>Crystallography and Scattering Methods</topic><topic>Infrared spectroscopy</topic><topic>Isomerization</topic><topic>Liquid crystal polymers</topic><topic>Liquid crystals</topic><topic>Materials Science</topic><topic>Mesophase</topic><topic>Monomers</topic><topic>Neodymium lasers</topic><topic>NMR spectroscopy</topic><topic>Nonlinear optics</topic><topic>Nonlinearity</topic><topic>Nuclear magnetic resonance spectroscopy</topic><topic>Optical microscopy</topic><topic>Optical properties</topic><topic>Polymer liquid crystals</topic><topic>Polymer Sciences</topic><topic>Polymers</topic><topic>Prepolymers</topic><topic>Refractivity</topic><topic>Semiconductor lasers</topic><topic>Solid Mechanics</topic><topic>Spectrum analysis</topic><topic>Stability analysis</topic><topic>Switching</topic><topic>Thermal stability</topic><topic>Thermogravimetric analysis</topic><topic>Thin films</topic><topic>YAG lasers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vijay Srinivasan, M.</creatorcontrib><creatorcontrib>Kannan, P.</creatorcontrib><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>https://resources.nclive.org/materials</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials science collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering collection</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vijay Srinivasan, M.</au><au>Kannan, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photo-switching and nonlinear optical behaviors of center linked bent-core azobenzene liquid crystalline polymers</atitle><jtitle>Journal of materials science</jtitle><stitle>J Mater Sci</stitle><date>2011-08-01</date><risdate>2011</risdate><volume>46</volume><issue>15</issue><spage>5029</spage><epage>5043</epage><pages>5029-5043</pages><issn>0022-2461</issn><eissn>1573-4803</eissn><abstract>A new class of two series (
I
and
II
) of center linked bent-core azobenzene liquid crystalline polymers were prepared. They were prepared from two different spacer lengths (2 and 10) between polymer backbone and bent-core mesogen. The bent-core mesogen possesses photoactive linking group with variable terminal chains (7, 8, and 9). The synthesized precursors, monomers, and polymers were characterized by FT-IR,
1
H NMR, and
13
C NMR spectroscopy. Thermal stability of polymers was examined by thermogravimetric analysis. The mesophase transition of monomers and polymers were observed through polarized optical microscopy, and confirmed by differential scanning calorimetry. Among the two series of polymers, the second series of polymers possesses liquid crystalline properties. The photo-switching properties of bent-core azo polymers were investigated using UV–Vis spectroscopy,
trans
to
cis
isomerization occurs around 35 s in chloroform and 65 s in thin film, where as reverse processes take place almost 32 h in chloroform. The photo-switching processes of polymer
IIa
precedes faster and also longer time thermally stable when compared with recently reported similar polymers. Negative optical nonlinear refractive index and optical limiting properties of the polymers were measured using Nd-YAG laser.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10853-011-5423-x</doi><tpages>15</tpages></addata></record> |
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| subjects | Azo compounds Azo polymers Backbone Calorimetry Characterization and Evaluation of Materials Chloroform Classical Mechanics Crystal structure Crystallinity Crystallography and Scattering Methods Infrared spectroscopy Isomerization Liquid crystal polymers Liquid crystals Materials Science Mesophase Monomers Neodymium lasers NMR spectroscopy Nonlinear optics Nonlinearity Nuclear magnetic resonance spectroscopy Optical microscopy Optical properties Polymer liquid crystals Polymer Sciences Polymers Prepolymers Refractivity Semiconductor lasers Solid Mechanics Spectrum analysis Stability analysis Switching Thermal stability Thermogravimetric analysis Thin films YAG lasers |
| title | Photo-switching and nonlinear optical behaviors of center linked bent-core azobenzene liquid crystalline polymers |
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