Luminescence Lifetime-Based Sensor for Cyanide and Related Anions
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- 作者：Pavel Anzenbacher ; Jr. ; Daniel S. Tyson ; Karolina Jursí ; ková ; and Felix N. Castellano
- 刊名：Journal of the American Chemical Society
- 出版年：2002
- 出版时间：June 5, 2002
- 年：2002
- 卷：124
- 期：22
- 页码：6232 - 6233
- 全文大小：46K
- 年卷期：v.124,no.22(June 5, 2002)
- ISSN：1520-5126
文摘
A new Ru(II) complex is described which serves as a luminescence lifetime-based sensor for fluoride and cyanide anions (KF = 640 000 mol-1, KCN = 430 000 mol-1). This chromophore displays observable changes in its UV-vis and steady-state luminescence spectra upon cyanide binding. Prior to cyanide addition, this complex exhibits a single-exponential lifetime (
= 377 ± 20 ns). With increasing cyanide concentrations, the intensity decays are composed of two exponentials: long (320-370 ns) and short (13-17 ns). The average lifetimes shorten as a function of cyanide concentration since the fractional intensity shifts from an initial dominant long lifetime component to the short lifetime component. This work represents the first example of a direct method for the luminescence lifetime-based sensing of anions.
= 377 ± 20 ns). With increasing cyanide concentrations, the intensity decays are composed of two exponentials: long (320-370 ns) and short (13-17 ns). The average lifetimes shorten as a function of cyanide concentration since the fractional intensity shifts from an initial dominant long lifetime component to the short lifetime component. This work represents the first example of a direct method for the luminescence lifetime-based sensing of anions.