Alkali Metal Ion Sensing in Aqueous Media by a Dibenzo-16-crown-5 Chromoionophore
- Authors
- Hayashita, Takashi; Kenji, Kunogi; Takagi, Makoto; Lee, Jong Chan; Bartsch, Richard A.
- Issue Date
- Dec-1995
- Publisher
- 한국분석과학회
- Keywords
- Crown ether; Chromoionophore; Photometry; Alkali metal ion sensing; Stability constant
- Citation
- Analytical Science and Technology, v.8, no.4, pp 793 - 798
- Pages
- 6
- Journal Title
- Analytical Science and Technology
- Volume
- 8
- Number
- 4
- Start Page
- 793
- End Page
- 798
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/59686
- ISSN
- 1225-0163
2288-8985
- Abstract
- A new chromoionophore sym-(decyl)(2-hydroxy-5-nitrobenzyloxy)-dibenzo-16-crown-5 (1) has been synthesized for Na+ photometry in aqueous media. Apparent pKa values of 1 in the presence of 0.10 M LiCl, NaCl, and KCl were measured by spectrophotometry in 50% 1,4-dioxane-50% water (v/v) and compared with the pKa of 8.68 in the presence of 0.10 M TMACl. A significant pKa shift to a lower pH was only observed for Na+ (ΔpH=131) due to selective binding of 1 with Na+. Based upon this pKa shift, chromoionophore 1 was found to selectively respond to Na+ with a detection limit of 10^(−3)M and no interference from K+ up to 0.05 M for detection of 10.0 mM Na+ in 50% 1,4-dioxane-50% water (v/v).
- Files in This Item
-
Go to Link
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.