A New Thioimide‐Based Fluorescent ‘Turn‐On’ and Chromogenic Chemodosimeter in Acetonitrile and Its Nanoparticles in Water for Highly Selective and Sensitive Detection of Hg<sup>2+</sup>

Mou, Yong; Lu, Haiyan; Li, Meng; Chen, Chuan‐Feng

doi:10.1002/cjoc.201600928

Cited by 8 publications

(2 citation statements)

References 56 publications

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“…为了优化 FA-MO 拉曼基底用于 Hg 2 ＋检测, 将 Hg 2＋与制备的 FA-MO 样品混合反应最佳时间选为 30 min(图 S6) [42] . 如图 11a, 在优化的实验条件下 Hg 2＋的检测限低至 1×10 -10 mol/L (S/N＝3, 详见支持信息图 S7).…”

Section: 引言unclassified

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles

Zuo¹,

Xu²,

Zhao³

2019

Acta Chim. Sinica

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Mercury is an important pollutant, which has attracted wide attention in recent years. Up to now, based on surface enhanced raman spectroscopy (SERS) strategy for detection of Hg 2＋ is very attractive due to its high sensitivity among various detection methods. Based on the "turn-off" mechanism, we synthesized a magnetic Fe 3 O 4 @Ag nanomaterial for SERS detection of Hg 2＋. The magnetic-plasma resonance nanoparticles, which combine magnetic and plasma resonance properties, can be used for SERS detection of mercury ions with high sensitivity and selectivity. Firstly, the magnetic nanoparticles were prepared by solvothermal reaction, and silver nanoparticles were coated on the surface of magnetic nanoparticles after modification of amino groups. By modifying the positively charged PDADMAC, polyDADMAC (PDDA) layer, the negatively charged methyl orange probe molecule is adsorbed on the surface of Fe 3 O 4 @Ag, and in the presence of Hg 2＋ , a significant decrease in SERS signal can be observed. Due to the short-time reaction of Hg 2＋ and Ag nanoparticles, an amalgam is formed on the surface of the Ag particles, which affects the surface plasmon resonance (SPR) characteristics of the Ag nanoparticles, resulting in enhanced attenuation of the electromagnetic field. And the short-time reaction of Hg 2＋ and Ag nanoparticles also leads to a decrease in the surface zeta potential of the Ag nanoparticles and affects the adsorption of the Raman probe molecules on the surface, resulting in a decrease in the SERS signal. Therefore, the decrease of SERS intensity in the presence of Hg 2＋ is mainly attributed to the interaction between Hg 2＋ and Ag nanoparticles. Through our experiments, it can be proved that the detection limit of the method based on "turn-off" mechanism for detecting Hg 2＋ ions can be as low as 10-10 mol/L. In addition, this method also shows high selectivity for divalent mercury ions. The SERS nanosensor designed in this experiment can be used to detect the specificity and ultra-sensitivity of Hg 2＋ in the environment, and it also provides great potential for the construction of SERS nanosensor for heavy metal ions. Keywords surface enhanced Raman spectroscopy (SERS); mercury(II) ion; magnetic nanomaterial; rapid detection; silver

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Section: 引言unclassified

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles

Zuo¹,

Xu²,

Zhao³

2019

Acta Chim. Sinica

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“…To address these challenges, researchers have explored CNF-based luminescent nanocomposites in the form of 3D membranes [ 13 ], offering a substantial surface area for efficient immobilization and intense fluorescence [ 14 ]. Most relevant to the area is affording highly sensitive identification systems for toxic ions, such as mercury (Hg 2+ ), which are associated with harmful effects on ecosystems and organisms [ 15 ]. Hg 2+ is predominantly emitted from industrial processes, including chemical manufacturing, the burning of fossil fuels, and the incineration of solid waste [ 16 ].…”

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Photoluminescent Nanocellulosic Film for Selective Hg2+ Ion Detection

Sun,

Fang,

Liza

et al. 2024

Polymers

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We developed a highly sensitive solid-state sensor for mercury detection by stabilizing red-sub-nanometric fluorescent gold nanoclusters (AuNC, 0.9 ± 0.1 nm diameter) with bovine serum albumin in a matrix composed of cellulose nanofibrils (CNF) (BSA-AuNC/CNF). The main morphological and optical features of the system were investigated via atomic force/transmission electron microscopy and UV-Vis/fluorescence spectroscopy. The hybrid film (off-white and highly transparent) showed strong photoluminescene under UV irradiation. The latter is assigned to the AuNC, which also increase the ductility of the emitting film, which was demonstrated for high sensitivity Hg2+ detection. When used as a sensor system, following AuNC printing on CNF hybrid films, a limit of detection <10 nM was confirmed. What is more, nanocellulose films have a high pore structure and selective separation properties, showcasing a wide range of potential applications in many fields such as water treatment and oil–water separation.

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One‐Pot Oxidative Aromatization and Dearomatization of Tetrahydro[5]helicene Diols: Synthesis, Structure, Photophysical and Chiroptical Properties of Chiral π‐Extended Diones

Fang

Lin

et al. 2018

Asian J Org Chem

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One-pot oxidative aromatization and dearomatization (OADA) reactions of tetrahydro [5]helicene diols with 2,3dichloro-5,6-dicyanobenzoquinone (DDQ) as the oxidant were demonstrated, which provided an efficient method for the synthesis of chiral π-extended diones. Consequently, a series of enantiomeric π-extended diones were obtained in high yields by a one-pot OADA of dibromo-substituted tetrahydro[5]helicene diols, and then followed by Suzuki-Miyaura cross-coupling reactions, or vice versa. The absolute configurations of the chiral diones were determined by their CD spectral analysis and X-ray structure of the dibromosubstituted dione. Moreover, the enantiomeric diones also exhibited mirror-imaged CD spectra and showed mirrorimaged circularly polarized luminescence (CPL) properties with the luminescence dissymmetry factor up to � 9.0 × 10 À 4 . It was further found that the chiral diones showed different fluorescence spectra, and substituent-dependent fluorescence quantum yields. For the chiral diones with strong electron-donating groups, high fluorescence quantum yields of up to 30.3% were found. Such chiral diones with high fluorescence quantum yields and significant CPL properties might have potential applications not only in asymmetric catalytic synthesis, but also chiroptical materials.[a] L. Fang, Dr.

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A New Thioimide‐Based Fluorescent ‘Turn‐On’ and Chromogenic Chemodosimeter in Acetonitrile and Its Nanoparticles in Water for Highly Selective and Sensitive Detection of Hg²⁺

Cited by 8 publications

References 56 publications

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles

Photoluminescent Nanocellulosic Film for Selective Hg2+ Ion Detection

One‐Pot Oxidative Aromatization and Dearomatization of Tetrahydro[5]helicene Diols: Synthesis, Structure, Photophysical and Chiroptical Properties of Chiral π‐Extended Diones

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A New Thioimide‐Based Fluorescent ‘Turn‐On’ and Chromogenic Chemodosimeter in Acetonitrile and Its Nanoparticles in Water for Highly Selective and Sensitive Detection of Hg2+

Cited by 8 publications

References 56 publications

A SERS Approach for Rapid Detection of Hg2+ Based on Functionalized Fe3O4@Ag Nanoparticles

A SERS Approach for Rapid Detection of Hg2+ Based on Functionalized Fe3O4@Ag Nanoparticles

Photoluminescent Nanocellulosic Film for Selective Hg2+ Ion Detection

One‐Pot Oxidative Aromatization and Dearomatization of Tetrahydro[5]helicene Diols: Synthesis, Structure, Photophysical and Chiroptical Properties of Chiral π‐Extended Diones

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A New Thioimide‐Based Fluorescent ‘Turn‐On’ and Chromogenic Chemodosimeter in Acetonitrile and Its Nanoparticles in Water for Highly Selective and Sensitive Detection of Hg²⁺

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles

A SERS Approach for Rapid Detection of Hg²⁺ Based on Functionalized Fe₃O₄@Ag Nanoparticles