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Cited by 293

The DOI matches its Crossref record.

Recognition of Potassium Ion in Water by 15-Crown-5 Functionalized Gold Nanoparticles

Lin, Sui-Yi, Liu, Shi-Wei, Lin, Chia-Mei, Chen, Chun-hsien·2002·Analytical Chemistry
DOI 10.1021/ac0156316
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Abstract

Reported here is an efficient recognition of K+ by 15-crown-5 functionalized gold nanoparticles in aqueous matrix containing physiologically important cations, such as Li+, Cs+, NH4+, Mg2+, Ca2+, and excess amount of Na+. Upon exposure to K+, the colloidal solution changes from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. The concentration ranges of K+ detected in this study are 0.099-0.48 mM and 7.6 microM-0.14 mM, when concentrations of colloidal gold are 54.9 and 7.1 nM, respectively. Recognition of K+ and formation of the aggregates are proposed via a sandwich complex of 2:1 between 15-crown-5 moiety and K+. Also discussed is the possibility of a preorganized structure of 15-crown-5 at the water-organic interface for the efficient complexation with K+.

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Authors
Lin, S.-Y., Liu, S.-W., Lin, C.-M., & Chen, C.-H.
Venue
Analytical Chemistry
Publisher
American Chemical Society (ACS)
Published
2001-12-12
Volume
74
Issue
2
Pages
330-335
ISSN
  • 0003-2700 (ISSN-L)
  • 1520-6882
DOI
10.1021/ac0156316
OpenAlex
W2061002655
Cited by
293
References
0
FWCI
6.67
Type
journal article
Language
en
Open access
closed

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