FluorescenceON–OFF switchingusingmicelleofstimuli-responsive double hydrophilicblockcopolymers:NileRed fluorescenceinmicelles of poly(acrylicacid-b-N-isopropylacrylamide)

Min MinYee; Tsubone, Miyabi; Morita, Takuya; Yusa, Shin-ichi; Nakashima, Kenichi

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Item

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FluorescenceON–OFF switchingusingmicelleofstimuli-responsive double hydrophilicblockcopolymers:NileRed fluorescenceinmicelles of poly(acrylicacid-b-N-isopropylacrylamide)

http://hdl.handle.net/20.500.12678/0000000580

Publication type
		Journal article
Upload type
		Publication
Title
	Title	FluorescenceON–OFF switchingusingmicelleofstimuli-responsive double hydrophilicblockcopolymers:NileRed fluorescenceinmicelles of poly(acrylicacid-b-N-isopropylacrylamide)
	Language	en
Publication date		2016
Authors
		Min MinYee
		Tsubone, Miyabi
		Morita, Takuya
		Yusa, Shin-ichi
		Nakashima, Kenichi
Description
		The dual-mode fluorescenceON–OFF switchingofNileRed(NR)byusingstimuli-responsivepolymeric micelle ofpoly(acrylicacid-b-N-isopropylacrylamide)(PAA-b-PNIPAM)hasbeenstudied.PAA-b-PNIPAM, one ofdoublehydrophilicblockcopolymers,isknowntoformPNIPAM-core/PAA-coronamicellesin aqueoussolutionswhenthetemperatureofthesolutioniselevateduptothelowercriticalsolution temperature(LCST)ofPNIPAMblock.ItalsoformsPAA-core/PNIPAM-coronamicelleswhentheanionic PAAblockischarge-neutralizedwithcationiccetyltrimethylammoniumion.Fluorescencepropertiesof NR inthemicellesareelucidatedbyobservingvarious fluorescenceparameterssuchasintensity, polarization, andquantumyield.Itisfoundthatthe fluorescence intensityisnegligiblylow(OFF-state) when PAA-b-PNIPAMexistsasaformofunimer,whereasitisremarkablyenhanced(ON-state)whenthe PNIPAM-coreorPAA-coremicellesareformed.Theseresultsdemonstratethatanovel fluorescence ON– OFF switchingsystemcanbeconstructedbyusingPAA-b-PNIPAMmicellesandNR.
Keywords
		Fluorescence
Identifier		https://umoar.mu.edu.mm/handle/123456789/308
Journal articles
		Journal of Luminescence
		176
Conference papaers
Books/reports/chapters
Thesis/dissertations