A naked-eye fluorescent sensor for copper(ii) ions based on a naphthalene conjugate Bodipy dye†,Photochemical & Photobiological Sciences

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A naked-eye fluorescent sensor for copper(ii) ions based on a naphthalene conjugate Bodipy dye†
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2018-06-13 00:00:00 , DOI: 10.1039/c8pp00137e
Canan Baslak _{1,

2,

3,

4} , Ahmed Nuri Kursunlu _{1,

2,

3,

4}

Affiliation

A novel naphthalene-Bodipy dye (N-Bodipy) was designed, prepared and characterized. N-Bodipy showed a selective and sensitive recognition toward Cu(II) ions as a fluorescent antenna group in acetonitrile/water over other metal cations. The complexation between Cu(II) ions and N-Bodipy gave a specific color change as well as caused fluorescence quenching under long-wavelength light (365 nm). The remarkable quenching effect in fluorescence intensity centered at 538 nm was only observed in the presence of copper(II) ions. Moreover, the orange color of N-Bodipy solution turned pale-yellow depending on the complexation effect in daylight. The complex stoichiometry was determined using a Job's plot and it was found to be 2 : 1 (ligand/metal). The binding constant was calculated with the Benesi–Hildebrand equation to be 1.39 × 10¹⁰ M⁻¹ and the detection limit was 1.28 μM (LOD = 3α/slope, α is the standard deviation) for Cu(II). The data proved that the binding between N-Bodipy and Cu(II) is chemically reversible.

中文翻译：

基于萘共轭Bodipy染料的铜（ii）离子裸眼荧光传感器†

设计，制备和表征了一种新型的萘-双联染料（N-Bodipy）。N-Bodipy对乙腈/水中的Cu（II）离子作为荧光天线基团的选择性和灵敏识别优于其他金属阳离子。Cu（II）离子与N-Bodipy之间的络合产生特定的颜色变化，并在长波长光（365 nm）下引起荧光猝灭。仅在铜的存在下才能观察到以538 nm为中心的荧光强度的显着猝灭作用（II）离子。此外，取决于日光下的络合效果，N-Bodipy溶液的橙色变为浅黄色。使用乔布氏图测定复数化学计量，发现其为2∶1（配体/金属）。用Benesi–Hildebrand方程计算的结合常数为1.39×10 ¹⁰ M ^-1，Cu（II）的检出限为1.28μM（LOD = 3α /斜率，α为标准偏差）。数据证明，N-Bodipy和Cu（II）之间的结合是化学可逆的。

更新日期：2018-06-13

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