Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts

Handle URI:
http://hdl.handle.net/10754/555759
Title:
Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts
Authors:
Gong, Dirong; Liu, Wen; Pan, Weijing; Chen, Tao; Jia, Xiaoyu; Huang, Kuo-Wei ( 0000-0003-1900-2658 ) ; Zhang, Xuequan
Abstract:
Tridentate complexes Cr(III)Cl<inf>3</inf>L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl<inf>3</inf>L, Fe(II)Cl<inf>2</inf>L and Co(II)Cl<inf>2</inf>L have been prepared and fully characterized. The solid structures of Cr(III)Cl<inf>3</inf>L, Fe(III)Cl<inf>3</inf>L and Co(II)Cl<inf>2</inf>L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl<inf>3</inf>L and Fe(III)Cl<inf>3</inf>L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl<inf>2</inf>L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl<inf>3</inf>L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl<inf>3</inf>L and Fe(II)Cl<inf>2</inf>L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (<10%), and Co(II)Cl<inf>2</inf>L catalyst displays predominated cis-1,4 selectivity, which can be shifted to 1,2 selectivity by adding PPh<inf>3</inf> as an additive. Thus, tuning of the cis-1,4, trans-1,4 and 1,2 selectivity in full range via central metal and additive chosen by these 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine supported catalysts has been achieved. © 2015 Elsevier B.V. All rights reserved.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Tunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts 2015 Journal of Molecular Catalysis A: Chemical
Journal:
Journal of Molecular Catalysis A: Chemical
Issue Date:
21-May-2015
DOI:
10.1016/j.molcata.2015.05.013
Type:
Article
ISSN:
13811169
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1381116915001867
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGong, Dirongen
dc.contributor.authorLiu, Wenen
dc.contributor.authorPan, Weijingen
dc.contributor.authorChen, Taoen
dc.contributor.authorJia, Xiaoyuen
dc.contributor.authorHuang, Kuo-Weien
dc.contributor.authorZhang, Xuequanen
dc.date.accessioned2015-05-26T06:52:17Zen
dc.date.available2015-05-26T06:52:17Zen
dc.date.issued2015-05-21en
dc.identifier.citationTunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalysts 2015 Journal of Molecular Catalysis A: Chemicalen
dc.identifier.issn13811169en
dc.identifier.doi10.1016/j.molcata.2015.05.013en
dc.identifier.urihttp://hdl.handle.net/10754/555759en
dc.description.abstractTridentate complexes Cr(III)Cl<inf>3</inf>L, [L = 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine], Fe(III)Cl<inf>3</inf>L, Fe(II)Cl<inf>2</inf>L and Co(II)Cl<inf>2</inf>L have been prepared and fully characterized. The solid structures of Cr(III)Cl<inf>3</inf>L, Fe(III)Cl<inf>3</inf>L and Co(II)Cl<inf>2</inf>L have been revealed by single crystal X-ray diffraction, and the Cr(III)Cl<inf>3</inf>L and Fe(III)Cl<inf>3</inf>L complexes both exhibit a distorted octahedral geometry, while the Co(II)Cl<inf>2</inf>L complex has a trigonal bipyramidal conformation. Four complexes have been examined in regioselective polymerization of butadiene in combination with MAO in toluene at room temperature. The trans-1,4, cis-1,4 enchainment of resultant polybutadiene are controlled by the metal center. Activated by MAO, complex Cr(III)Cl<inf>3</inf>L produces high level of trans-1,4 selectivity (trans-1,4 up to 93.3%) with moderate polymer yield, complexes Fe(III)Cl<inf>3</inf>L and Fe(II)Cl<inf>2</inf>L both show equal cis-1,4 and trans-1,4 with minor 1,2 selectivity (<10%), and Co(II)Cl<inf>2</inf>L catalyst displays predominated cis-1,4 selectivity, which can be shifted to 1,2 selectivity by adding PPh<inf>3</inf> as an additive. Thus, tuning of the cis-1,4, trans-1,4 and 1,2 selectivity in full range via central metal and additive chosen by these 2,6-bis(dimethyl-2-oxazolin-2-yl) pyridine supported catalysts has been achieved. © 2015 Elsevier B.V. All rights reserved.en
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1381116915001867en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Molecular Catalysis A: Chemical. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Molecular Catalysis A: Chemical, 21 May 2015. DOI: 10.1016/j.molcata.2015.05.013en
dc.subjectTransition metal catalystsen
dc.subject1,3-butadieneen
dc.subjectselectivityen
dc.subject2,6-bis(dimethyl-2-oxazolin-2-yl)pyridineen
dc.subjectcontrollable microstructureen
dc.titleTunable regioselectivity in 1,3-butadiene polymerization by using 2,6-bis(dimethyl-2-oxazolin-2-yl)pyridine incorporated transition metal (Cr, Fe and Co) catalystsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalJournal of Molecular Catalysis A: Chemicalen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Polymer Science and Engineering, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, PR Chinaen
dc.contributor.institutionMOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology, National Base for International Cooperation in Science & Technology of Textiles and Daily Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, PR Chinaen
dc.contributor.institutionKey Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR Chinaen
dc.contributor.institutionKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, No.1799, Jimei Road, Xiamen, Fujian 361021, PR Chinaen
dc.contributor.institutionNingbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo,Zhejiang 315830,PR Chinaen
kaust.authorGong, Dirongen
kaust.authorHuang, Kuo-Weien
kaust.authorChen, Taoen
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