Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry
New star poly(N-isopropylacrylamide)-b-polyhedral oligomeric silsesquioxane (PNIPAm-b-POSS) copolymers were synthesized from octa-azido functionalized POSS (N3-POSS) and alkyne-PNIPAm, which was prepared using an alkyne-functionalized atom transfer radical polymerization (ATRP) initiator (propargyl...
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| Veröffentlicht in: | Journal of nanomaterials 2012-01, Vol.2012 (2012), p.1-10 |
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| container_title | Journal of nanomaterials |
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| creator | Chang, Feng-Chih Ko, Fu-Hsiang Fan, Shih-Kang Kuo, Shiao-Wei Huang, Yu-Chan Hong, Jing-Long Yeh, Ding-Ru |
| description | New star poly(N-isopropylacrylamide)-b-polyhedral oligomeric silsesquioxane (PNIPAm-b-POSS) copolymers were synthesized from octa-azido functionalized POSS (N3-POSS) and alkyne-PNIPAm, which was prepared using an alkyne-functionalized atom transfer radical polymerization (ATRP) initiator (propargyl 2-bromo-2-methylpropionamide), via click chemistry. These star PNIPAm-b-POSS copolymers undergo a sharp coil-globule transition in water at above 32°C changing from a hydrophilic state below this temperature to a hydrophobic state above it, which is similar to linear PNIPAm homopolymers. More interestingly, we found that these star polymers exhibited strong blue photoluminescence in water above a lower critical solution temperature (LCST). This photoluminescence was likely due to the constrained geometric freedom and relatively rigid structure caused by intramolecular hydrogen bonding within the star PNIPAm polymers, which exhibit an intrinsic fluorescent behavior. |
| doi_str_mv | 10.1155/2012/749732 |
| format | Article |
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These star PNIPAm-b-POSS copolymers undergo a sharp coil-globule transition in water at above 32°C changing from a hydrophilic state below this temperature to a hydrophobic state above it, which is similar to linear PNIPAm homopolymers. More interestingly, we found that these star polymers exhibited strong blue photoluminescence in water above a lower critical solution temperature (LCST). This photoluminescence was likely due to the constrained geometric freedom and relatively rigid structure caused by intramolecular hydrogen bonding within the star PNIPAm polymers, which exhibit an intrinsic fluorescent behavior.</description><identifier>ISSN: 1687-4110</identifier><identifier>EISSN: 1687-4129</identifier><identifier>DOI: 10.1155/2012/749732</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Alkynes ; Copolymers ; Hydrogen bonding ; Nanomaterials ; Nanoparticles ; Photoluminescence ; Polymers ; Stars</subject><ispartof>Journal of nanomaterials, 2012-01, Vol.2012 (2012), p.1-10</ispartof><rights>Copyright © 2012 Shiao-Wei Kuo et al.</rights><rights>Copyright © 2012 Shiao-Wei Kuo et al. Shiao-Wei Kuo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c389t-701918a5fc109d510b0803fe913ca402f62714afbfbffd26d24ac3b31ebe0f6b3</citedby><cites>FETCH-LOGICAL-c389t-701918a5fc109d510b0803fe913ca402f62714afbfbffd26d24ac3b31ebe0f6b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><contributor>Prado, Luis Antonio Sanchez de Almeida</contributor><creatorcontrib>Chang, Feng-Chih</creatorcontrib><creatorcontrib>Ko, Fu-Hsiang</creatorcontrib><creatorcontrib>Fan, Shih-Kang</creatorcontrib><creatorcontrib>Kuo, Shiao-Wei</creatorcontrib><creatorcontrib>Huang, Yu-Chan</creatorcontrib><creatorcontrib>Hong, Jing-Long</creatorcontrib><creatorcontrib>Yeh, Ding-Ru</creatorcontrib><title>Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry</title><title>Journal of nanomaterials</title><description>New star poly(N-isopropylacrylamide)-b-polyhedral oligomeric silsesquioxane (PNIPAm-b-POSS) copolymers were synthesized from octa-azido functionalized POSS (N3-POSS) and alkyne-PNIPAm, which was prepared using an alkyne-functionalized atom transfer radical polymerization (ATRP) initiator (propargyl 2-bromo-2-methylpropionamide), via click chemistry. These star PNIPAm-b-POSS copolymers undergo a sharp coil-globule transition in water at above 32°C changing from a hydrophilic state below this temperature to a hydrophobic state above it, which is similar to linear PNIPAm homopolymers. More interestingly, we found that these star polymers exhibited strong blue photoluminescence in water above a lower critical solution temperature (LCST). This photoluminescence was likely due to the constrained geometric freedom and relatively rigid structure caused by intramolecular hydrogen bonding within the star PNIPAm polymers, which exhibit an intrinsic fluorescent behavior.</description><subject>Alkynes</subject><subject>Copolymers</subject><subject>Hydrogen bonding</subject><subject>Nanomaterials</subject><subject>Nanoparticles</subject><subject>Photoluminescence</subject><subject>Polymers</subject><subject>Stars</subject><issn>1687-4110</issn><issn>1687-4129</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>BENPR</sourceid><recordid>eNqF0cFq3DAUBVBTGmiadNV9EWQzaXGiJ1u2tQwmbQMhM3SmayPLTx0lsjWRPKT-jv5wlDqUkk0QSFocnnS5SfIR6BkA5-eMAjsvc1Fm7E1yCEVVpjkw8fbfHei75H0It5TmXHB2mPxZj9KTlbPT4iY1we28201WKh-33nR4SjY4btFjR0b3122x89KSpTW_XI_eKLI2NmC43xv3Ww5IFqvlen1KbuTgdtKPRlkMpJ2IJLXrWzPI0biBOE0uNj9WRA4dqa1Rd6TeYm_C6Kfj5EDLOPLD83mU_Px6uam_p9fLb1f1xXWqskqMaUlBQCW5VkBFx4G2tKKZRgGZkjllumAl5FK3cemOFR3LpcraDLBFqos2O0oW89wY-n6PYWzi-wqtjSncPjTAGFSiYEAjPXlBb93eD_F3DVBW8pJzkUf1ZVbKuxA86mbnTS_9FFHzVFDzVFAzFxT151lvzdDJB_MK_jRjjAS1_A8zEXNmj5Bqmmw</recordid><startdate>20120101</startdate><enddate>20120101</enddate><creator>Chang, Feng-Chih</creator><creator>Ko, Fu-Hsiang</creator><creator>Fan, Shih-Kang</creator><creator>Kuo, Shiao-Wei</creator><creator>Huang, Yu-Chan</creator><creator>Hong, Jing-Long</creator><creator>Yeh, Ding-Ru</creator><general>Hindawi Publishing Corporation</general><general>Hindawi Limited</general><scope>ADJCN</scope><scope>AHFXO</scope><scope>RHU</scope><scope>RHW</scope><scope>RHX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L7M</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20120101</creationdate><title>Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry</title><author>Chang, Feng-Chih ; 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| subjects | Alkynes Copolymers Hydrogen bonding Nanomaterials Nanoparticles Photoluminescence Polymers Stars |
| title | Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry |
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