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231223s2007 xx ||||| 00| ||eng c |
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|a (NLM)17343398
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Ogawa, Katsu
|e verfasserin
|4 aut
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|a Conjugated polyelectrolyte-grafted silica microspheres
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 27.06.2007
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|a Date Revised 03.04.2007
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a A direct method for preparation of conjugated polymer-grafted silica particles is reported. Silica particles (0.3 and 5 mum diameter) are treated with a 3-(trimethoxysilyl)propylamine derivative that is functionalized with an aryl iodide unit. A solution step-growth polymerization reaction is performed in solution that contains a dispersion of the aryl iodide-functionalized particles. The reaction is a Pd(0)-catalyzed (Sonogashira) A-B-type polymerization of an oligo(ethylene glycol)-fuctionalized diiodobenzene and a bis(propyloxy)sulfonate-substituted diethynylbenzene. The overall process affords silica particles that feature a surface graft layer of an anionic poly(phenylene ethynylene)-type conjugated polyelectrolyte. The particle surface modification process was monitored by infrared (FTIR) spectroscopy, and the polymer-grafted silica particles were characterized by thermogravimetric analysis, scanning and transmission electron microscopy, confocal fluorescence microscopy, and absorption and fluorescence spectroscopy. The conjugated polyelectrolyte-grafted silica particles are highly fluorescent, and a Stern-Volmer quenching study of the particles' fluorescence with electron-transfer- and energy-transfer-type quenchers shows that the quenching response depends on the type of quenching mechanism
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|a Journal Article
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1 |
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|a Chemburu, Sireesha
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lopez, Gabriel P
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Whitten, David G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schanze, Kirk S
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 23(2007), 8 vom: 10. Apr., Seite 4541-8
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
1 |
8 |
|g volume:23
|g year:2007
|g number:8
|g day:10
|g month:04
|g pages:4541-8
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|d 23
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