A colorimetric and fluorometric investigation of Cu(II) ion in aqueous medium with a fluorescein-based chemosensor

Rathod Reena V.; Bera Smritilekha; Singh Man; Mondal Dhananjoy

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A colorimetric and fluorometric investigation of Cu(II) ion in aqueous medium with a fluorescein-based chemosensor

机译：荧光素化学传感器水性介质中Cu（II）离子的比色和荧光测定研究

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As a selective colorimetric and fluorometric chemosensor, a novel fluorescein-based Schiff base (FNSB), 1,4-bis(1-fluorescein)-2,3-diaza-1,3-butadiene (L, 3) exhibits efficient binding for Cu2+ ion in water and allows naked-eye detection as a result of the formation of a 1 : 1 copper-ligand complex. The complexations of Cu2+ ion due to molecular interaction with 3 resulted in a rapid change in color from colorless to deep yellow with a characteristic change in the UV-vis absorption to a longer wavelength by 130 nm in acetonitrile and significant quenching of the fluorescence intensity (similar to 2.5 fold for Cu2+ ion) with maxima at 519 nm in 1% DMSO-Tris buffer solution at physiological pH (7.4). The detection limit of Cu2+ ion in acetonitrile is found to be 20 mu M by UV spectroscopy, whereas in aqueous solution, the limit is reduced to 1.25 mu M by fluorescence spectroscopy.

机译：作为一种选择性色谱和荧光化疗传感器，一种新型荧光素的席夫碱（FNSB），1,4-双（1-荧光素）-2,3-Diaza-1,3-丁二烯（L，3）表现出有效的结合 Cu2 +离子在水中，允许裸眼检测作为形成1：1铜 - 配体络合物的形成。 Cu2 +离子由于分子相互作用与3的络合导致从无色到深黄色的颜色的快速变化，在乙腈中的UV-Vis吸收到较长波长的特征变化，荧光强度的显着猝灭（与Cu2 +离子的2.5倍相似，在生理pH（7.4）的1％DMSO-TRIS缓冲溶液中，最大值为519nm。发现乙腈中Cu2 +离子的检测限为UV光谱法为20μm，而在水溶液中，通过荧光光谱通过荧光谱将极限降至1.25μm。

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《RSC Advances》 |2016年第41期|共8页
作者
Rathod Reena V.; Bera Smritilekha; Singh Man; Mondal Dhananjoy;
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Cent Univ Gujarat Sch Chem Sci Gandhinagar 382030 India;

Cent Univ Gujarat Sch Chem Sci Gandhinagar 382030 India;

Cent Univ Gujarat Sch Chem Sci Gandhinagar 382030 India;

Cent Univ Gujarat Sch Chem Sci Gandhinagar 382030 India;

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正文语种 eng
中图分类化学;
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1. A colorimetric and fluorometric investigation of Cu(II) ion in aqueous medium with a fluorescein-based chemosensor [J] . Rathod Reena V., Bera Smritilekha, Singh Man, RSC Advances . 2016,第41期

机译：荧光素化学传感器水性介质中Cu（II）离子的比色和荧光测定研究
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A colorimetric and fluorometric investigation of Cu(II) ion in aqueous medium with a fluorescein-based chemosensor

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