Electrospun 1,4-DHAQ-Doped Cellulose Nanofiber Films for Reusable Fluorescence Detection of Trace Cu~(2+) and Further for Cr~(3+)

Meiling Wang; Guowen Meng; Qing Huang; Yiwu Qian

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Electrospun 1,4-DHAQ-Doped Cellulose Nanofiber Films for Reusable Fluorescence Detection of Trace Cu~(2+) and Further for Cr~(3+)

机译：静电纺丝1,4-DHAQ掺杂的纤维素纳米纤维薄膜用于痕量Cu〜（2+）的可重复使用荧光检测以及Cr〜（3+）的可重复使用荧光检测。

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1,4-Dihydroxyanthraquinone (1,4-DHAQ, a fluo-rophore) doped cellulose (CL) (denoted as l,4-DHAQ@CL) microporous nanofiber film has been achieved via simple electrospinning and subsequent deacetyiating, and used for highly sensitive and selective fluorescence detection of Cu2* in aqueous solution. As the resultant byproduct of Cu2*-contaminated l,4-DHAQ@CL nanofiber film showed recovered fluorescence by extra addition of Cr** nitrate solution, 1,4-DHAQ. and Co~(2+) codoped CL (denoted as (1,4-DHAQ)-Cu~(2+)@ CL)) microporous nanofiber film has been further fabricated for the detection of Cr~(3+) in aqueous solution. It was found that the fluorescence intensity of the l,4-DHAQ@CL microporous nanofiber film linearly decreases with Cu~(2+) concentration ranging from 2.5 × 10~(-9)to 3.75 × 10~(-9)M, while that of the codoped (1,4-DHAQ)-Cu~(2+)@CL nanofiber film linearly increases with Cr~(1+) concentration from 2.5×10~(-9) to 2.5 × 10~(-8) M, both with high selectivity over many other common heavy metal ions. The sensing mechanism for Cu~(2+) is ascribed to the formation of pbenolate between 1,4-DHAQ and Cu2*, while that for Cr~(3+) is attributed to the reversing reaction from Cu~(2+)based phenolate to Cu~(2+) and Cr~(3+)based excited complex with recovered fluorescence. The sensitive and selective detection of Cu~(2+) and Cr~(2+)by using the 1,4-DHAQ@CL and the (1,4DHAQ)-Cu~(2+)@CL nanofiber films was further demonstrated in polluted lake waters, thus indicating their potential applications in environmental monitoring of Cu~(2+)and Cr~(3+) in polluted water. Additionally, both the l,4-DHAQ@CL and (l,4-DHAQ)-Cu~(2+)@CL microporous nanofiber films are reusable for the detection of Cu~(2+)and Cr~(3+), respectively, after simple treatment The design concept in this work might also open a door to the design of effective fluorescence probes for other heavy metal ions.

机译：通过简单的静电纺丝和随后的脱乙酰作用，已经获得了1,4-二羟基蒽醌（1,4-DHAQ，氟-荧光团）掺杂的纤维素（CL，表示为1,4-DHAQ @ CL）微孔纳米纤维薄膜，并已被广泛用于水溶液中Cu2 *的灵敏和选择性荧光检测。由于被Cu2 *污染的1,4-DHAQ @ CL纳米纤维薄膜的副产物显示出通过额外添加硝酸Cr **溶液1,4-DHAQ可以恢复荧光。进一步制备了Co〜（2+）共掺杂CL（表示为（1,4-DHAQ）-Cu〜（2 +）@ CL）微孔纳米纤维膜，用于水溶液中Cr〜（3+）的检测。。结果表明，1,4-DHAQ @ CL微孔纳米纤维薄膜的荧光强度随Cu〜（2+）浓度范围从2.5×10〜（-9）到3.75×10〜（-9）M呈线性下降。而共掺杂的（1,4-DHAQ）-Cu〜（2 +）@ CL纳米纤维薄膜的膜浓度随Cr〜（1+）浓度从2.5×10〜（-9）线性增加至2.5×10〜（-8））M均具有对许多其他常见重金属离子的高选择性。 Cu〜（2+）的感应机制归因于1,4-DHAQ与Cu2 *之间的对苯二酸酯的形成，而Cr〜（3+）的感应机制归因于Cu〜（2+）基的逆反应酚盐制得Cu〜（2+）和Cr〜（3+）基激发复合物，并回收荧光。进一步证明了使用1,4-DHAQ @ CL和（1,4DHAQ）-Cu〜（2 +）@ CL纳米纤维薄膜对Cu〜（2+）和Cr〜（2+）的灵敏和选择性检测在被污染的湖水中，因此表明它们在环境污染水中Cu〜（2+）和Cr〜（3+）的环境监测中的潜在应用。此外，l，4-DHAQ @ CL和（l，4-DHAQ）-Cu〜（2 +）@ CL微孔纳米纤维膜均可重复使用，用于检测Cu〜（2+）和Cr〜（3+）分别经过简单处理后，这项工作中的设计概念也可能为其他重金属离子的有效荧光探针的设计打开一扇门。

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来源
《Environmental Science & Technology》 |2012年第1期|p.367-373|共7页
作者
Meiling Wang; Guowen Meng; Qing Huang; Yiwu Qian;
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作者单位

Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures,Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China;

Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures,Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China;

Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei,230031, China;

Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures,Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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Electrospun 1,4-DHAQ-Doped Cellulose Nanofiber Films for Reusable Fluorescence Detection of Trace Cu~(2+) and Further for Cr~(3+)

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