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Article: Synthesis and characterization of random and block copolymers with pendant rhenium diimine complexes by controlled radical polymerization

TitleSynthesis and characterization of random and block copolymers with pendant rhenium diimine complexes by controlled radical polymerization
Authors
KeywordsAtom transfer radical polymerization
Block copolymers
Metal-polymer complexes
Issue Date2005
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/36444
Citation
Journal Of Polymer Science, Part A: Polymer Chemistry, 2005, v. 43 n. 6, p. 1292-1308 How to Cite?
AbstractWe report the polymerization of rhenium-containing methacrylates by atom transfer radical polymerization. The structure of the monomer was confirmed by X-ray crystallography, which showed the bulkiness of the metal-complex moiety. The rhenium complexes were polymerized in the presence of copper(I) bromide, 1,1,4,7,7-pentamethyl-diethylenetriamine, and methyl 2-bromopropionate. They were copolymerized with methyl methacrylate in different monomer ratios. An ABA triblock copolymer was also synthesized with poly(methyl methacrylate) as the macroinitiator. When 2,2'-bipyridine was used as the ligand for the copper catalyst in the polymerizations, it underwent a ligand exchange process with the iminopyridine ligand in the monomer. The neutral rhenium complex in the homopolymers and copolymers could be converted into ionic forms by the replacement of the chloride with an imidazole ligand, and the solubility of the resulting ionic polymers was greatly enhanced. The photosensitizing properties of the doped and undoped polymer films were investigated by the measurement of the photocurrent response under an externally applied electric field. The photoconductivities of the polymers were approximately 10 -12-10 13 Ω 1 cm -1. The experimental quantum efficiencies were simulated with On-sager's theory, and they showed that the initial quantum yield and thermalization distance were 10 -3 and 1.7 nm, respectively. Transmission electron microscopy showed that the rhenium complexes aggregated to form domains with dimensions of approximately 20-30 nm. © 2005 Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/70048
ISSN
2015 Impact Factor: 3.114
2015 SCImago Journal Rankings: 1.037
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTse, CWen_HK
dc.contributor.authorLam, LSMen_HK
dc.contributor.authorMan, KYKen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorChan, WKen_HK
dc.date.accessioned2010-09-06T06:19:13Z-
dc.date.available2010-09-06T06:19:13Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of Polymer Science, Part A: Polymer Chemistry, 2005, v. 43 n. 6, p. 1292-1308en_HK
dc.identifier.issn0887-624Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70048-
dc.description.abstractWe report the polymerization of rhenium-containing methacrylates by atom transfer radical polymerization. The structure of the monomer was confirmed by X-ray crystallography, which showed the bulkiness of the metal-complex moiety. The rhenium complexes were polymerized in the presence of copper(I) bromide, 1,1,4,7,7-pentamethyl-diethylenetriamine, and methyl 2-bromopropionate. They were copolymerized with methyl methacrylate in different monomer ratios. An ABA triblock copolymer was also synthesized with poly(methyl methacrylate) as the macroinitiator. When 2,2'-bipyridine was used as the ligand for the copper catalyst in the polymerizations, it underwent a ligand exchange process with the iminopyridine ligand in the monomer. The neutral rhenium complex in the homopolymers and copolymers could be converted into ionic forms by the replacement of the chloride with an imidazole ligand, and the solubility of the resulting ionic polymers was greatly enhanced. The photosensitizing properties of the doped and undoped polymer films were investigated by the measurement of the photocurrent response under an externally applied electric field. The photoconductivities of the polymers were approximately 10 -12-10 13 Ω 1 cm -1. The experimental quantum efficiencies were simulated with On-sager's theory, and they showed that the initial quantum yield and thermalization distance were 10 -3 and 1.7 nm, respectively. Transmission electron microscopy showed that the rhenium complexes aggregated to form domains with dimensions of approximately 20-30 nm. © 2005 Wiley Periodicals, Inc.en_HK
dc.languageengen_HK
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/36444en_HK
dc.relation.ispartofJournal of Polymer Science, Part A: Polymer Chemistryen_HK
dc.subjectAtom transfer radical polymerizationen_HK
dc.subjectBlock copolymersen_HK
dc.subjectMetal-polymer complexesen_HK
dc.titleSynthesis and characterization of random and block copolymers with pendant rhenium diimine complexes by controlled radical polymerizationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1612-5681&volume=43&spage=1292&epage=1308&date=2005&atitle=Synthesis+and+characterization+of+random+and+block+copolymers+with+pendant+rhenium+diimine+complexes+by+controlled+radical+polymerizationen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.emailChan, WK: waichan@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/pola.20587en_HK
dc.identifier.scopuseid_2-s2.0-15544367050en_HK
dc.identifier.hkuros100811en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-15544367050&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume43en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1292en_HK
dc.identifier.epage1308en_HK
dc.identifier.isiWOS:000227223900015-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTse, CW=8264696700en_HK
dc.identifier.scopusauthoridLam, LSM=7201984714en_HK
dc.identifier.scopusauthoridMan, KYK=8051698900en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK

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