- P-ISSN 1225-0163
- E-ISSN 2288-8985
- P-ISSN1225-0163
- E-ISSN2288-8985
- SCOPUS, ESCI, KCI
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Alkali Metal Ion Sensing in Aqueous Media by a Dibenzo-16-crown-5 Chromoionophore
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1995, v.8 no.4, pp.793-798
Hayashita,
T., Kenji,
K., Takagi,
M., Lee,
J. C., &
Bartsch,
R.
A.
(1995). Alkali Metal Ion Sensing in Aqueous Media by a Dibenzo-16-crown-5 Chromoionophore. , 8(4), 793-798.
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Abstract
A new chromoionophore sym-(decyl)(2-hydroxy-5-nitrobenzyloxy)-dibenzo-16-crown-5 (1) has been synthesized for <TEX>$Na^+$</TEX> photometry in aqueous media. Apparent <TEX>$pK_a$</TEX> 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 <TEX>$pK_a$</TEX> of 8.68 in the presence of 0.10 M TMACl. A significant <TEX>$pK_a$</TEX> shift to a lower pH was only observed for <TEX>$Na^+$</TEX> (<TEX>${\Delta}pH
- keywords
- Crown ether, Chromoionophore, Photometry, Alkali metal ion sensing, Stability constant
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