Proton-assisted iron(III) recognition with 4,4′-(4,5-diaminonaphthalen-1,8-yldiazo)-bisbenzenesulfonate

Yu Jiuan Cheng, Wei Ching Liao, Chong Mou Wang*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

摘要

Azo compounds, including 4,4′-(4,5-diaminonaphthalen-1,8-yldiazo)-bisbenzenesulfonate (DBS), 4,5-bis-(4-nitro-phenylazo)-naphthlene-1,8-diamine (NND), 4-(4-aminophen-1-ylazo)-benzenesulfonic acid (ABS), 4-(4-aminonaphthalen-1-ylazo)-benzenesulfonic acid (ANBS) and 1,1′-(4,5-diaminonaphthalen-1,8-diylazo)-bisbenzene (DNB) were synthesized and characterized for their potential in Fe3+ recognition in acidic solutions. DBS interacts specifically with Fe3+ in HCl solution, resulting in a significant alteration of the absorption and emission spectra. According to the spectral changes, DBS probably forms a 1:1 complex with Fe3+; the equilibrium constant was estimated to be ∼105 M-1. Replacing Fe3+ with Fe2+, Ni2+, Al3+ and Cr3+ or substituting NND, ABS, ANBS and DNB for DBS did not yield similar results, indicating that a configuration of two sulfonate groups is essential for Fe3+ chelation. DBS can be modified on glassy carbon and Au-sputtered quartz crystal electrodes (Au-QCM, fo = 9 MHz), via azotization and in situ electrochemical deazotization processes in HCl solution. When immobilized on QCM, DBS showed ability to attract Fe3+ from the solution phase, leading to a linear relationship between log{divides}Δf{divides} and log[Fe3+] over the range 10-4-10-3 M in 0.01 M HCl, with little interference from Fe2+ and Cr3+. Accordingly, DBS is a promising receptor for Fe3+ in acidic conditions.

原文英語
頁(從 - 到)15-21
頁數7
期刊Journal of Electroanalytical Chemistry
612
發行號1
DOIs
出版狀態已發佈 - 2008 1月 1

ASJC Scopus subject areas

  • 分析化學
  • 一般化學工程
  • 電化學

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