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Multiresponsive Fluorescence "Turn ON-OFF" Switch on PB@EuW10/SiO2 Composite for Dual Spectral Detection of N2H4 and H2O2.
Langmuir ( IF 3.7 ) Pub Date : 2020-03-29 , DOI: 10.1021/acs.langmuir.0c00078 Wei Li 1 , Zhelin Liu 1 , Bo Zhao 1 , Jinghai Liu 2
Langmuir ( IF 3.7 ) Pub Date : 2020-03-29 , DOI: 10.1021/acs.langmuir.0c00078 Wei Li 1 , Zhelin Liu 1 , Bo Zhao 1 , Jinghai Liu 2
Affiliation
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Herein, a fluorescence “turn ON–OFF” switch model PB@EuW10/SiO2 core@shell composite is designed and fabricated by coating EuW10-containing silica layer on Prussian blue (PB) nanoparticles via a facile method. It is found that the presence of PB can quench the photoluminescence of the composite which arises from EuW10. When hydrazine is mixed with the composite dispersion, PB can be reduced to Prussian white (PW), resulting in the decrease of UV absorption and the appearance of photoluminescence (turn ON). In addition, PW can also be converted back to PB, which is achieved by adding hydrogen peroxide, and the photoluminescence of the composite is quenched again (turn OFF). Thus, the composite is applied for N2H4 and H2O2 detection by fluorescence spectroscopy and UV–vis absorption spectroscopy. Wide linear ranges for N2H4 and H2O2 detection with low detection limits are found for both detection methods on the PB@EuW10/SiO2 core@shell composite. Besides, the color from light blue to colorless of the detection dispersion can also indicate the turn ON–OFF switch for fluorescence. Furthermore, the proposed model can also be extended to other composites.
中文翻译：
PB @ EuW10 / SiO2复合材料上的多响应荧光“ Turn ON-OFF”开关，用于对N2H4和H2O2进行双光谱检测。
在此，通过简便的方法，通过在普鲁士蓝（PB）纳米颗粒上涂覆含EuW 10的二氧化硅层，设计和制造了一种荧光“打开-关闭”开关模型PB @ EuW 10 / SiO 2核壳复合材料。发现PB的存在可以淬灭由EuW 10引起的复合材料的光致发光。当将肼与复合分散体混合时，PB可以还原为普鲁士白（PW），从而导致UV吸收减少和出现光致发光现象（打开）。此外，还可通过添加过氧化氢将PW转换回PB，然后再次淬灭复合材料的光致发光（关闭）。因此，该复合材料适用于N 2通过荧光光谱法和紫外可见吸收光谱法检测H 4和H 2 O 2。在PB @ EuW 10 / SiO 2核@壳复合材料上，两种检测方法均发现N 2 H 4和H 2 O 2检测的线性范围宽，检测限低。此外，从检测分散体的浅蓝色到无色的颜色还可以指示荧光的打开/关闭开关。此外，提出的模型还可以扩展到其他复合材料。
更新日期：2020-03-29
中文翻译：
PB @ EuW10 / SiO2复合材料上的多响应荧光“ Turn ON-OFF”开关，用于对N2H4和H2O2进行双光谱检测。
在此，通过简便的方法，通过在普鲁士蓝（PB）纳米颗粒上涂覆含EuW 10的二氧化硅层，设计和制造了一种荧光“打开-关闭”开关模型PB @ EuW 10 / SiO 2核壳复合材料。发现PB的存在可以淬灭由EuW 10引起的复合材料的光致发光。当将肼与复合分散体混合时，PB可以还原为普鲁士白（PW），从而导致UV吸收减少和出现光致发光现象（打开）。此外，还可通过添加过氧化氢将PW转换回PB，然后再次淬灭复合材料的光致发光（关闭）。因此，该复合材料适用于N 2通过荧光光谱法和紫外可见吸收光谱法检测H 4和H 2 O 2。在PB @ EuW 10 / SiO 2核@壳复合材料上，两种检测方法均发现N 2 H 4和H 2 O 2检测的线性范围宽，检测限低。此外，从检测分散体的浅蓝色到无色的颜色还可以指示荧光的打开/关闭开关。此外，提出的模型还可以扩展到其他复合材料。
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