Photophysical properties of N -acylated linear polyethylenimine and dehydroalanine main-chain polymers containing carbazole or pyrene groups in side chains
dc.contributor.author | Arora, Kartar S. | en_US |
dc.contributor.author | Overberger, Charles Gilbert | en_US |
dc.contributor.author | Johnson, G. E. | en_US |
dc.date.accessioned | 2006-04-28T18:19:49Z | |
dc.date.available | 2006-04-28T18:19:49Z | |
dc.date.issued | 1986-10 | en_US |
dc.identifier.citation | Arora, Kartar S.; Overberger, C. G.; Johnson, G. E. (1986)."Photophysical properties of N -acylated linear polyethylenimine and dehydroalanine main-chain polymers containing carbazole or pyrene groups in side chains." Journal of Polymer Science Part B: Polymer Physics 24(10): 2275-2292. <http://hdl.handle.net/2027.42/38853> | en_US |
dc.identifier.issn | 0887-6266 | en_US |
dc.identifier.issn | 1099-0488 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/38853 | |
dc.description.abstract | A comparison of the UV absorption spectra of a carbazole-substituted N -acylated linear polyethylenimine (PEI) ( 5, 6 ) with its monomer ( 1, 2 ) and dimer ( 3, 4 ) model compounds shows the presence of local conformational order of the carbazole groups in 3, 5 , and 6 since these compounds exhibit hypochromism. The UV absorption spectra of carbazole-substituted N -acrylated dehydroalanine main-chain polymer (PDA) ( 12, 13 ) and monomer ( 10, 11 ) model compounds indicate that the extent of local conformational order of the carbazole groups is reduced in 12 and 13 compared to that in 5 and 6 . The UV absorption spectra of a pyrene-substituted PEI ( 9 ) and PDA ( 15 ) and those of their monomer model compounds ( 7, 14 ) indicate that the extent of local conformational order of the pyrene groups is greater in 9 than in 15 and furthermore the pyrene-substituted polymers ( 9, 15 ) show more local conformational order than analogous carbazole-substituted polymers ( 5, 12 ). The emission spectra of 5 and 12 show carbazole monomer emission, while those of 9 and 15 are dominated by pyrene excimer emission. The formation of excimer emission is more efficient in 9 than in 15 . Fluorescence lifetime measurements indicate interactions of excited carbazole groups in 5 and 13 but not in 12 . The quenching of carbazole fluorescence by dimethyl terephthalate is more efficient in 5 than that in 12 , indicating more efficient transfer of electronic energy in 5 . These measurements show that the PEI main-chain polymers are conducive to interactions of the pendant groups. | en_US |
dc.format.extent | 1083026 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | John Wiley & Sons, Inc. | en_US |
dc.subject.other | Chemistry | en_US |
dc.subject.other | Polymer and Materials Science | en_US |
dc.title | Photophysical properties of N -acylated linear polyethylenimine and dehydroalanine main-chain polymers containing carbazole or pyrene groups in side chains | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry and the Macromolecular Research Center, The University of Michigan, Ann Arbor, Michigan 48109 | en_US |
dc.contributor.affiliationum | Department of Chemistry and the Macromolecular Research Center, The University of Michigan, Ann Arbor, Michigan 48109 | en_US |
dc.contributor.affiliationother | Webster Research Center, Xerox Corporation, Webster, New York 14580 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/38853/1/090241011_ftp.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1002/polb.1986.090241011 | en_US |
dc.identifier.source | Journal of Polymer Science Part B: Polymer Physics | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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