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Article: Synthesis and properties of polyimide with diazacrown ether moiety and the corresponding polymer barium complexes

TitleSynthesis and properties of polyimide with diazacrown ether moiety and the corresponding polymer barium complexes
Authors
Issue Date2001
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/cm
Citation
Chemistry Of Materials, 2001, v. 13 n. 12, p. 4635-4641 How to Cite?
AbstractA series of polyimides with diaza-18-crown-6 moieties on the main chain were synthesized by the reaction between 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and different macrocyclic diamine monomers. The polyimide barium complexes were also synthesized from the corresponding monomeric barium complexes. An X-ray crystal structure of one of the monomers was also determined. Good quality, free-standing polymer films were obtained by thermal imidization of the poly(amic acid) presursors. No decomposition of the barium complexes was found during the thermal imidization processes. The polyimides and their barium complexes exhibit different electronic absorption properties, which is attributed to the formation of charge-transfer excited states. The binding of barium ion to the polymer main chain may affect the energy level of the resulting charge transfer states. In addition, the emission properties of the polyimides with and without barium ion are also different. Changes in the emission spectrum were observed when the metal-free polyimide film was immersed in barium solution. These materials may serve as potential candidates as sensors for barium or other alkaline earth metals.
Persistent Identifierhttp://hdl.handle.net/10722/69380
ISSN
2015 Impact Factor: 9.407
2015 SCImago Journal Rankings: 4.232
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, SHen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorChan, WKen_HK
dc.date.accessioned2010-09-06T06:13:08Z-
dc.date.available2010-09-06T06:13:08Z-
dc.date.issued2001en_HK
dc.identifier.citationChemistry Of Materials, 2001, v. 13 n. 12, p. 4635-4641en_HK
dc.identifier.issn0897-4756en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69380-
dc.description.abstractA series of polyimides with diaza-18-crown-6 moieties on the main chain were synthesized by the reaction between 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and different macrocyclic diamine monomers. The polyimide barium complexes were also synthesized from the corresponding monomeric barium complexes. An X-ray crystal structure of one of the monomers was also determined. Good quality, free-standing polymer films were obtained by thermal imidization of the poly(amic acid) presursors. No decomposition of the barium complexes was found during the thermal imidization processes. The polyimides and their barium complexes exhibit different electronic absorption properties, which is attributed to the formation of charge-transfer excited states. The binding of barium ion to the polymer main chain may affect the energy level of the resulting charge transfer states. In addition, the emission properties of the polyimides with and without barium ion are also different. Changes in the emission spectrum were observed when the metal-free polyimide film was immersed in barium solution. These materials may serve as potential candidates as sensors for barium or other alkaline earth metals.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/cmen_HK
dc.relation.ispartofChemistry of Materialsen_HK
dc.titleSynthesis and properties of polyimide with diazacrown ether moiety and the corresponding polymer barium complexesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0897-4756&volume=13&spage=4635&epage=4641&date=2001&atitle=Synthesis+and+properties+of+polyimide+with+diazacrown+ether+moiety+and+the+corresponding+polymer+barium+complexesen_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.doi10.1021/cm0103500en_HK
dc.identifier.scopuseid_2-s2.0-0035672910en_HK
dc.identifier.hkuros68312en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035672910&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume13en_HK
dc.identifier.issue12en_HK
dc.identifier.spage4635en_HK
dc.identifier.epage4641en_HK
dc.identifier.isiWOS:000172889300037-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChan, SH=55455843600en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK

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