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ID 45814
file
creator
Kida, Motoki
Kubo, Mayuko
Ujihira, Tomoyuki
subject
crown ethers
fluorescence
photodissociation spectroscopy
metal ions
excimer
NDC
Chemistry
abstract
Observation of an excimer fluorescence in solution is proposed for detecting the encapsulation of potassium ion as opposed to other alkali ions by dibenzo-crown ethers. The scheme has been validated by ultraviolet photodissociation (UVPD) spectroscopy of dibenzo-21-crown-7 and dibenzo-24-crown-8 complexes with potassium ion, K+·DB21C7 and K+·DB24C8, performed under cold (~10 K) conditions in the gas phase and by quantum chemical calculations of the geometry and electronic structures of the complexes. Calculations suggest formation of a closely spaced excimer structure of benzene rings only for the K+·DB24C8. Interaction of the rings may lead to lifetime broadening in UV absorption, which is experimentally observed in the gas phase, indeed, only for this cold complex. Consistently, intramolecular excimer fluorescence of DB24C8 in solution is observed only for K+·DB24C8. The excimer fluorescence is not observed with other alkali metal ions. The detection of such intramolecular excimer fluorescence therefore can, potentially, serve as a simple, background-fee, selective probe of potassium ion in solution.
description
This work was partly supported by JSPS KAKENHI Grant Numbers JP17H0302200 (MA) and JP16H04098 (YI).
journal title
ChemPhysChem
volume
Volume 19
issue
Issue 11
start page
1331
end page
1335
date of issued
2018-06-05
publisher
Wiley-VCH
issn
1439-4235
1439-7641
publisher doi
pubmed id
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
This is the accepted version of the following article: [M. Kida, M. Kubo, T. Ujihira, T. Ebata, M. Abe, and Y. Inokuchi.(2018), Selective Probing of Potassium Ion in Solution by Intramolecular Excimer Fluorescence of Dibenzo-Crown Ethers. ChemPhysChem, 19: 1–6], which has been published in final form at http://doi.org/10.1002/cphc.201800163. This article may be used for non-commercial purposes in accordance with Wiley Self-Archiving Policy.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
department
Graduate School of Science
note
Post-print version/PDF may be used in an institutional repository after an embargo period of 12 months.



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