Ultra­pH­Sensitive Small Molecule Probe Showing a Ratiometric Fluorescence Color Change

Title
Ultra­pH­Sensitive Small Molecule Probe Showing a Ratiometric Fluorescence Color Change
Authors
김세훈Junjie Cui김가영권지언박수영
Issue Date
2020-06
Publisher
CHEMPHOTOCHEM
Citation
VOL 4, NO 6-397
Abstract
We synthesized an amphiphilic small molecule 1 by attaching oligo(ethylene glycol) (OEG) and N,N­diethylamine (DEA) units to a fluorescent dicyanodistyrylbenzene (DCS) core. The molecule is fully soluble in aqueous solution at low pH (pH<4.3) by protonation of the DEA groups; but, above pH?4.3, it self­assembles to form nanoparticles due to increased hydrophobicity upon deprotonation, leading to a ratiometric fluorescence color change from green emission in the monomeric form (λem,max=538?nm) to red emission in the aggregated form (λem,max=646?nm). It should be noted that the ratio of emission intensities at 538?nm and 646?nm (R=I538/I646) changes drastically about 42­fold within a very narrow pH?range of 4.3?4.6.
URI
http://pubs.kist.re.kr/handle/201004/72333
ISSN
2367-0932
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE