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  1. University of Mandalay
  2. Department of Chemistry

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

Permalink : http://hdl.handle.net/20.500.12678/0000000580
03513619-4918-447d-8b1e-ef5cbb13f9b9
ed693fcd-fb54-4412-b2c2-5648039a11cf
Publication type Journal article
Upload Type Publication
Title
FluorescenceON–OFF switchingusingmicelleofstimuli-responsive double hydrophilicblockcopolymers:NileRed fluorescenceinmicelles of poly(acrylicacid-b-N-isopropylacrylamide)
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
Journal articles
Journal of Luminescence
176
Conference papaers
Books/reports/chapters
Thesis/dissertations
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