A water soluble Cu2+-specific colorimetric probe can also detect Zn2+ in live shrimp and aqueous environmental samples by fluorescence channel

Raju, Muralikrishna; Nair, Ratish R.; Raval, Ishan H.; Haldar, Soumya; Chatterjee, Pabitra B.

doi:10.1016/j.snb.2018.01.010

Cited by 21 publications

(12 citation statements)

References 37 publications

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“…In this study, a novel ratiometric fluorescent nanoprobe was designed by simply mixing chitosan‐derived CDs and bovine serum albumin (BSA)–Au nanoclusters (AuNCs) to develop a ratiometric fluorescence sensor for Cu 2+ detection in water. The ratiometric fluorescent nanoprobe had good water dispersibility, low cytotoxicity and stable emission, and was ideal for water environment testing . With the addition of Cu 2+ , BSA–AuNCs fluorescence was quenched because interaction of Cu 2+ with the S of cysteine weakened the interaction between BSA and AuNCs to cause a decrease in fluorescence intensity .…”

Section: Introductionsupporting

confidence: 81%

Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Yang

Zeng

et al. 2018

Luminescence

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A ratiometric fluorescence sensor for Cu 2+ detection was developed by employing carbon dots (CDs) as the reference fluorophore, and bovine serum albumin (BSA)-Au nanoclusters (AuNCs) both as specific recognition element and as response signal.The CDs were prepared by heating an acetic acid solution of chitosan at 180°C. The proposed nanoprobe was prepared by simply mixing the CDs and BSA-AuNCs. Here, the CDs were associated with BSA-AuNCs to form CDs/BSA-AuNCs nanoprobes based on electrostatic interaction and hydrogen bonds. In the hybrid fluorescent CDs/BSA-AuNCs nanoprobe, the emission of BSA-AuNCs at 640 nm was quenched by Cu 2+ , whereas the emission of CDs at 424 nm was maintained. The fluorescence changes of I 640 /I 424 had good linearity with Cu 2+ concentration in the range 1.5-600 nM, and the detection limit of the nanoprobe was 0.5 nM for Cu 2+ detection, almost 4 × 10 4 times lower than the maximum allowable amount of Cu 2+ in drinking water. The proposed method for detecting Cu 2+ also had high selectivity and feasibility.

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Section: Introductionsupporting

confidence: 81%

Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Yang

Zeng

et al. 2018

Luminescence

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“…Salen‐like compounds and their analogues (R–CH=N–(CH 2 ) n –N=CH–R) as a class of significant Schiff bases have been extensively applied in metal organic chemistry and coordination chemistry, and their complexes with transition metal ions have attracted much attentions . These complexes not only have unique structures, but also have many interesting properties, such as organic reaction catalysts, magnetic materials, electrochemistry fields, supramolecular architectures, luminescent properties, ion recognitions, biological antimicrobial activities and so on.…”

Section: Introductionmentioning

confidence: 99%

Newly synthesized homomultinuclear Co (II) and Cu (II) bissalamo‐like complexes: Structural characterizations, Hirshfeld analyses, fluorescence and antibacterial properties

Pan

Zhang

et al. 2020

Applied Organom Chemis

101

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Rare homodinuclear Co (II) complex [Co2(L)NO3] (1) and helical centrosymmetric homotetranuclear Cu (II) complex [Cu4(L)2(H2O)2]·2ClO4 (2), have been synthesized by a newly explored bis (salamo)‐like tetraoxime ligand (H3L) with Co (NO3)2·6H2O and Cu (ClO4)2·6H2O, respectively, and characterized by elemental analyses, IR, UV–Vis spectroscopy and single crystal X‐ray crystallography. X‐ray crystallographic studies indicate that the two Co (II) atoms (Co1 and Co2) in complex 1 have different N2O4 and N2O3 coordination spheres, and distorted octahedral (Co1) and slightly distorted triangular bipyramidal (Co2) geometries, while Cu (II) atoms in complex 2 have also two different N2O4 (Cu1) and N2O3 (Cu2) coordination environments, and complex 2 forms a helical centrosymmetric molecule. In addition, supramolecular interactions, Hirshfeld surfaces analyses, antibacterial and fluorescence properties were also investigated in detail.

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“…Furthermore, the detection limit for Cu 2+ was estimated to be 22.8 nM with the ratio of signal‐to‐noise of 3. The performances of the proposed ratiometric fluorescence sensor based on ZIF‐8@rhodamine‐B nanocomposites were compared with some other Cu 2+ sensors in Table . The resulting sensor showed some superiority which might be owing to the uniform nanostructures of ZIF‐8@rhodamine‐B nanocomposites and the ratiometric method.…”

Section: Resultsmentioning

confidence: 99%

“…These methods can accurately determine the concentration of trace Cu 2+ , but they also have some obvious shortcomings such as time‐consuming, high‐cost, complicated operation, and so on . Recently, the selective detection of trace Cu 2+ through fluorescence techniques has aroused great interest in many areas . The fluorescence analysis method is the most efficient way to detect low concentrations of Cu 2+ …”

Section: Introductionmentioning

confidence: 99%

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

et al. 2019

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Zeolitic imidazolate framework-8 (ZIF-8) loading rhodamine-B (ZIF-8@rhodamine-B) nanocomposites was proposed and used as ratiometric fluorescent sensor to detect copper(II) ion (Cu 2+ ). Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption isotherms and fluorescence emission spectroscopy were employed to characterize the ZIF-8@rhodamine-B nanocomposites. The results showed the rhodamine-B was successfully assembled on ZIF-8 based on the π-π interaction and the hydrogen bond between the nitrogen atom of ZIF-8 and -COOH of rhodamine-B. The as-obtained ZIF-8@rhodamine-B nanocomposites were octahedron with size about 150-200 nm, had good water dispersion, and exhibited the characteristic fluorescence emission of ZIF-8 at 335 nm and rhodamine-B at 575 nm. The Cu 2+ could quench fluorescence of ZIF-8 rather than rhodamine-B. The ZIF-8 not only acted as the template to assemble rhodamine-B, but also was employed as the signal fluorescence together with the fluorescence of rhodamine-B as the reference to construct a novel ratiometric fluorescent sensor to detect Cu 2+ . The resulted ZIF-8@rhodamine-B nanocomposite fluorescence probe showed good linear range (68.4 nM to 125 μM) with a low detection limit (22.8 nM) for Cu 2+ combined with good sensitivity and selectivity. The work also provides a better way to design ratiometric fluorescent sensors from ZIF-8 and other fluorescent molecules. KEYWORDSCu 2 + , ratiometric fluorescent sensor, rhodamine-B, zeolitic imidazolate framework-8 biotoxicity, poor aqueous solubility and stability, etc. Nanomaterial fluorescent probes, especially the metal-organic frameworks (MOFs) or zeolitic imidazolate framework-8 (ZIF-8) based probes, are attracting more and more interest and are used for different applications due to their predictable pore sizes, considerable specific surface area, good encapsulation and hierarchical structures. [35][36][37][38][39] For example, carbon dots (CDs)@MOFs have been prepared to enhance fluorescence sensing. [40] A ratiometric type fluorescence sensor has two or more emission wavelengths, and the target content is usually quantified based on the relationship between the ratio of fluorescence intensities at two wavelengths and the concentration of the analyte. At the same time, this sensor mode enhances the dynamic response range by adjusting the change of intensity ratio, and establishes an internal standard to make it self-regulating, greatly weakening the effect some experimental conditions such as probe concentration, temperature, polarity, environmental pH, and stability. These experimental conditions are usually difficult to control in the experimental process. Moreover, as the concentration of analyte changes, the color of the ratio probe changes step-by-step, thereby enabling visual detection of the analyte, and semi-quantitative and qualitative analysis of the analyte can be achieved depending on the color of the ratio probe. [41,42] Therefore, the construction of rati...

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A water soluble Cu2+-specific colorimetric probe can also detect Zn2+ in live shrimp and aqueous environmental samples by fluorescence channel

Cited by 21 publications

References 37 publications

Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Newly synthesized homomultinuclear Co (II) and Cu (II) bissalamo‐like complexes: Structural characterizations, Hirshfeld analyses, fluorescence and antibacterial properties

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

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A water soluble Cu2+-specific colorimetric probe can also detect Zn2+ in live shrimp and aqueous environmental samples by fluorescence channel

Cited by 21 publications

References 37 publications

Ratiometric fluorescence detection of Cu2+ based on carbon dots/bovine serum albumin–Au nanoclusters

Ratiometric fluorescence detection of Cu2+ based on carbon dots/bovine serum albumin–Au nanoclusters

Newly synthesized homomultinuclear Co (II) and Cu (II) bissalamo‐like complexes: Structural characterizations, Hirshfeld analyses, fluorescence and antibacterial properties

Ratiometric fluorescent detection of Cu2+ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites

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Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Ratiometric fluorescence detection of Cu²⁺ based on carbon dots/bovine serum albumin–Au nanoclusters

Ratiometric fluorescent detection of Cu²⁺ based on dual‐emission ZIF‐8@rhodamine‐B nanocomposites