Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases
A series of titanium (Ti) complexes bearing ONO-tridentate Schiff bases were synthesized and their application to the ring-opening polymerization of L-lactide and ε-caprolactone was studied. Ti complexes bearing ONO-tridentate Schiff bases revealed a greater catalytic activity compared to other prev...
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| Veröffentlicht in: | Polymer (Guilford) 2018-03, Vol.140, p.315-325 |
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| creator | Ou, Hsiu-Wei Lu, Wei-Yi Vandavasi, Jaya Kishore Lin, Ya-Fan Chen, Hsuan-Ying Lin, Chu-Chieh |
| description | A series of titanium (Ti) complexes bearing ONO-tridentate Schiff bases were synthesized and their application to the ring-opening polymerization of L-lactide and ε-caprolactone was studied. Ti complexes bearing ONO-tridentate Schiff bases revealed a greater catalytic activity compared to other previously synthesized Ti complexes bearing multi-dentate phenolate ligands. We hypothesize that using ONO-tridentate Schiff bases as ligands reduces the occupied space and increases the monomer coordination around the Ti center, thereby increasing catalytic activity. The electronic effect of the phenolate group on the polymerization rate was also studied, showing that electron-donating substituents on the ligands could drastically increase polymerization activity.
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•Ti complexes bearing ONO-tridentate Schiff base ligands have been synthesized.•Their reactivity for the polymerization of cyclic esters has been studied.•Reducing the dentate-number of ligands increases the reactivity of Ti complexes.•The electron-donating substituents drastically increased polymerization activity. |
| doi_str_mv | 10.1016/j.polymer.2018.02.016 |
| format | Article |
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[Display omitted]
•Ti complexes bearing ONO-tridentate Schiff base ligands have been synthesized.•Their reactivity for the polymerization of cyclic esters has been studied.•Reducing the dentate-number of ligands increases the reactivity of Ti complexes.•The electron-donating substituents drastically increased polymerization activity.</description><identifier>ISSN: 0032-3861</identifier><identifier>EISSN: 1873-2291</identifier><identifier>DOI: 10.1016/j.polymer.2018.02.016</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Bearing ; Caprolactone ; Catalysis ; Catalytic activity ; Chemical synthesis ; Coordination compounds ; Esters ; Imines ; L-lactide ; Ligands ; Phenols ; Polymerization ; Ring opening polymerization ; Titanium</subject><ispartof>Polymer (Guilford), 2018-03, Vol.140, p.315-325</ispartof><rights>2018 Elsevier Ltd</rights><rights>Copyright Elsevier BV Mar 28, 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c374t-f0b494d472d1bd3fe72c2cace9665b47f4ff5ed63d6fcf13651a9214c8bf04023</citedby><cites>FETCH-LOGICAL-c374t-f0b494d472d1bd3fe72c2cace9665b47f4ff5ed63d6fcf13651a9214c8bf04023</cites><orcidid>0000-0003-1424-3540</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.polymer.2018.02.016$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27929,27930,46000</link.rule.ids></links><search><creatorcontrib>Ou, Hsiu-Wei</creatorcontrib><creatorcontrib>Lu, Wei-Yi</creatorcontrib><creatorcontrib>Vandavasi, Jaya Kishore</creatorcontrib><creatorcontrib>Lin, Ya-Fan</creatorcontrib><creatorcontrib>Chen, Hsuan-Ying</creatorcontrib><creatorcontrib>Lin, Chu-Chieh</creatorcontrib><title>Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases</title><title>Polymer (Guilford)</title><description>A series of titanium (Ti) complexes bearing ONO-tridentate Schiff bases were synthesized and their application to the ring-opening polymerization of L-lactide and ε-caprolactone was studied. Ti complexes bearing ONO-tridentate Schiff bases revealed a greater catalytic activity compared to other previously synthesized Ti complexes bearing multi-dentate phenolate ligands. We hypothesize that using ONO-tridentate Schiff bases as ligands reduces the occupied space and increases the monomer coordination around the Ti center, thereby increasing catalytic activity. The electronic effect of the phenolate group on the polymerization rate was also studied, showing that electron-donating substituents on the ligands could drastically increase polymerization activity.
[Display omitted]
•Ti complexes bearing ONO-tridentate Schiff base ligands have been synthesized.•Their reactivity for the polymerization of cyclic esters has been studied.•Reducing the dentate-number of ligands increases the reactivity of Ti complexes.•The electron-donating substituents drastically increased polymerization activity.</description><subject>Bearing</subject><subject>Caprolactone</subject><subject>Catalysis</subject><subject>Catalytic activity</subject><subject>Chemical synthesis</subject><subject>Coordination compounds</subject><subject>Esters</subject><subject>Imines</subject><subject>L-lactide</subject><subject>Ligands</subject><subject>Phenols</subject><subject>Polymerization</subject><subject>Ring opening polymerization</subject><subject>Titanium</subject><issn>0032-3861</issn><issn>1873-2291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFUMtOwzAQtBBIlMInIFninGA7zosLQhWPShU9AGcrsdfgKomD7VaUL-CzcdVeOHFaaXdmdmYQuqQkpYQW16t0tN22B5cyQquUsDRuj9CEVmWWMFbTYzQhJGNJVhX0FJ15vyKEsJzxCfqZ96OzG-hhCNgMOJjQDGbdY2n7sYMv8Nivx9G6AAq3W_wiP4zWuG18vES8M8N7YkcY4sQHG-a7CcYO2Gost7IzEoMP4PwNXj4vk-CMis-aAH_EztGJbjoPF4c5RW8P96-zp2SxfJzP7haJzEoeEk1aXnPFS6ZoqzINJZNMNhLqoshbXmqudQ6qyFShpaZZkdOmZpTLqtWEE5ZN0dVeN8b-XEdjYmXXbogvBSN5xYoqFhZR-R4lnfXegRajM33jtoISsStdrMQhrdiVLggTcRt5t3sexAgbE69eGhgkKONABqGs-UfhF_InkUM</recordid><startdate>20180328</startdate><enddate>20180328</enddate><creator>Ou, Hsiu-Wei</creator><creator>Lu, Wei-Yi</creator><creator>Vandavasi, Jaya Kishore</creator><creator>Lin, Ya-Fan</creator><creator>Chen, Hsuan-Ying</creator><creator>Lin, Chu-Chieh</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><orcidid>https://orcid.org/0000-0003-1424-3540</orcidid></search><sort><creationdate>20180328</creationdate><title>Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases</title><author>Ou, Hsiu-Wei ; Lu, Wei-Yi ; Vandavasi, Jaya Kishore ; Lin, Ya-Fan ; Chen, Hsuan-Ying ; Lin, Chu-Chieh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-f0b494d472d1bd3fe72c2cace9665b47f4ff5ed63d6fcf13651a9214c8bf04023</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Bearing</topic><topic>Caprolactone</topic><topic>Catalysis</topic><topic>Catalytic activity</topic><topic>Chemical synthesis</topic><topic>Coordination compounds</topic><topic>Esters</topic><topic>Imines</topic><topic>L-lactide</topic><topic>Ligands</topic><topic>Phenols</topic><topic>Polymerization</topic><topic>Ring opening polymerization</topic><topic>Titanium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ou, Hsiu-Wei</creatorcontrib><creatorcontrib>Lu, Wei-Yi</creatorcontrib><creatorcontrib>Vandavasi, Jaya Kishore</creatorcontrib><creatorcontrib>Lin, Ya-Fan</creatorcontrib><creatorcontrib>Chen, Hsuan-Ying</creatorcontrib><creatorcontrib>Lin, Chu-Chieh</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Biotechnology Research Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Polymer (Guilford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ou, Hsiu-Wei</au><au>Lu, Wei-Yi</au><au>Vandavasi, Jaya Kishore</au><au>Lin, Ya-Fan</au><au>Chen, Hsuan-Ying</au><au>Lin, Chu-Chieh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases</atitle><jtitle>Polymer (Guilford)</jtitle><date>2018-03-28</date><risdate>2018</risdate><volume>140</volume><spage>315</spage><epage>325</epage><pages>315-325</pages><issn>0032-3861</issn><eissn>1873-2291</eissn><abstract>A series of titanium (Ti) complexes bearing ONO-tridentate Schiff bases were synthesized and their application to the ring-opening polymerization of L-lactide and ε-caprolactone was studied. Ti complexes bearing ONO-tridentate Schiff bases revealed a greater catalytic activity compared to other previously synthesized Ti complexes bearing multi-dentate phenolate ligands. We hypothesize that using ONO-tridentate Schiff bases as ligands reduces the occupied space and increases the monomer coordination around the Ti center, thereby increasing catalytic activity. The electronic effect of the phenolate group on the polymerization rate was also studied, showing that electron-donating substituents on the ligands could drastically increase polymerization activity.
[Display omitted]
•Ti complexes bearing ONO-tridentate Schiff base ligands have been synthesized.•Their reactivity for the polymerization of cyclic esters has been studied.•Reducing the dentate-number of ligands increases the reactivity of Ti complexes.•The electron-donating substituents drastically increased polymerization activity.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.polymer.2018.02.016</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-1424-3540</orcidid></addata></record> |
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| subjects | Bearing Caprolactone Catalysis Catalytic activity Chemical synthesis Coordination compounds Esters Imines L-lactide Ligands Phenols Polymerization Ring opening polymerization Titanium |
| title | Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases |
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