34 0

TURN-ON fluorescence detection of cyanide using an ensemble system consisting of a dansyl-based cationic probe and dicyanovinyl derivative

Title
TURN-ON fluorescence detection of cyanide using an ensemble system consisting of a dansyl-based cationic probe and dicyanovinyl derivative
Author
채필석
Keywords
Fluorogenic probe; Dansyl fluorophore; CN- sensor; Supramolecular self-assembly
Issue Date
2019-03
Publisher
ELSEVIER SCI LTD
Citation
DYES AND PIGMENTS, v. 162, Page. 348-357
Abstract
An imidazolium-bearing dansyl-based probe (probe 1; D) and three dicynovinyl group-containing substrates with different alkyl chain length (S1, S2 and S3) were prepared. Three binary ensembles, designated DS1, DS2, and DS3, were generated for CN- detection in a buffer solution of HEPES: DMSO (2:8) (pH = 7.4) by combining these probe and substrates. Upon addition of CN-, each ensemble gave a large fluorescence emission enhancement, but showed little response to the addition of other anions, indicating the high selectivity toward CN- detection. DS1 including an octyl pendant-bearing substrate (S1) gave a high association constant (K-a,K-app = 2.38 x 10(8)M(-1)) and a low LOD (200 nM) for CN- sensing in HEPES: DMSO (2:8) (pH = 7.4). Dynamic light scattering (DLS), transmission electron microscopy (TEM) and H-1 NMR studies indicate that the substrate (S1) was associated with cationic probe 1 to form supramolecular self-assemblies following its addition reaction with a nucleophilic CN- .This assembly formation that causes the dansyl fluorophore of probe 1 to reposition from a hydrophilic water to the hydrophobic assembly interiors is likely responsible for a significant increase in the fluorescence intensity of the ensemble system. The other ensemble systems (DS2 and DS3) containing relatively short alkyl chains (pentyl and methyl, respectively) were inferior to the long alkyl chain system (DS1), indicating the importance of the alkyl chain length for highly sensitive CN- detection.
URI
https://www.sciencedirect.com/science/article/pii/S0143720818319806?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/110431
ISSN
0143-7208; 1873-3743
DOI
10.1016/j.dyepig.2018.10.033
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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