View : 34 Download: 0

A PCT-based, pyrene-armed calix[4]crown fluoroionophore

Title
A PCT-based, pyrene-armed calix[4]crown fluoroionophore
Authors
Choi J.K.Kim S.H.Yoon J.Lee K.-H.Bartsch R.A.Kim J.S.
Ewha Authors
윤주영
SCOPUS Author ID
윤주영scopus
Issue Date
2006
Journal Title
Journal of Organic Chemistry
ISSN
0022-3263JCR Link
Citation
vol. 71, no. 21, pp. 8011 - 8015
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A photoinduced charge transfer (PCT)-based 1,3-alternate calix[4]crown fluoroionophore containing two cation recognition sites, a crown ether ring and two facing pyreneamide groups, is synthesized. Upon addition of K +, Pb 2+, or Cu 2+, wavelength changes are observed in both the fluorescence and absorption spectra, but with different binding modes. With K +, fluorescence emissions of the ligand scarcely change, while addition of Pb 2+ or Cu 2+ produces a remarkable change in both the excimer and monomer emissions. The observed data indicate that the metal cation is encapsulated in the crown-5 ring for K + and by the two facing amide groups in the latter case, which is verified by a metal ion exchange experiment. The wavelength shifts in both fluorescence and absorption spectra upon addition of Cu2+ show that, in contrast to Pb 2+, Cu 2+ interacts with the nitrogen atoms of the amide groups, resulting in a PCT mechanism. © 2006 American Chemical Society.
DOI
10.1021/jo060981j
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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