Department of Chemistry, Anhui Science and Technology University, Bengbu, Anhui, 233100, China.
Anal Bioanal Chem. 2010 Feb;396(3):1197-203. doi: 10.1007/s00216-009-3161-6. Epub 2009 Dec 22.
An "off-on" rhodamine-based fluorescence probe for the selective signaling of Cr(III) has been designed by exploiting the guest-induced structure transform mechanism. This system shows a sharp Cr(III)-selective fluorescence enhancement response in 100% aqueous system under physiological pH value and possesses high selectivity against the background of environmentally and biologically relevant metal ions including Cr(VI), Al(III), Fe(III), Cd(II), Co(II), Cu(II), Ni(II), Zn(II), Mg(II), Ba(II), Pb(II), Na(I), and K(I). Under optimum conditions, the fluorescence intensity enhancement of this system is linearly proportional to Cr(III) concentration from 5.0 x 10(-8) to 7.0 x 10(-6) mol L(-1) with a detection limit of 1.6 x 10(-8) mol L(-1).
一种基于罗丹明的“开-关”型荧光探针，通过客体诱导结构转变机制，用于选择性检测 Cr(III)。在生理 pH 值下，该体系在 100%水相体系中对 Cr(III)表现出尖锐的荧光增强响应，对包括 Cr(VI)、Al(III)、Fe(III)、Cd(II)、Co(II)、Cu(II)、Ni(II)、Zn(II)、Mg(II)、Ba(II)、Pb(II)、Na(I)和 K(I)在内的环境和生物相关金属离子具有高选择性。在最佳条件下，该体系的荧光强度增强与 Cr(III)浓度在 5.0 x 10(-8)至 7.0 x 10(-6) mol L(-1)范围内呈线性关系，检测限为 1.6 x 10(-8) mol L(-1)。
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