Novel Pyrazoline-Based Selective Fluorescent Sensor for Hg2+

Wang, Shengqing; Liu, Shuyan; Wang, Haoyan; Zheng, Xiaojiao; Yuan, Xun; Liu, Yizhi; Jiang, Miao; Zhao, Bao‐Xiang

doi:10.1007/s10895-013-1339-y

Cited by 19 publications

(4 citation statements)

References 36 publications

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“…Influenced by these factors, Wang et al developed pyrazoline-based chemosensor 14 (Fig. 6 a) [ 77 ]. In 10% ethanol solution, the probe showed an absorption band at 347 nm.…”

Section: Single Ion Sensormentioning

confidence: 99%

A Review on Metal Ion Sensors Derived from Chalcone Precursor

2022

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Disclosure of new molecular probes as chromogenic and fluorogenic cation sensors is scientifically exigent work. Recently chalcone derivatives gained more attention because of their structural variability. A suitable donor and acceptor groups separated by delocalized π-orbitals display excellent chromogenic and fluorogenic properties because of intramolecular charge transfer (ICT). These designed molecular frameworks provide the coordination sites to the incoming metal ions results in small changes in the optical properties. In a typical sensing behavior, coordination leads to a large conjugation plane with the probe resulted in hypo/hyperchromic shifts or red/blue shifts. In this review, we tried to converge the reported chalcone-derived sensors and explored the design, synthesis, metal ion sensing mechanism, and practical application of the probes. We expect that this review gives a basic outline for researchers to explore the field of chalcone-based sensors further.

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“…Influenced by these factors, Wang et al developed pyrazoline-based chemosensor 14 (Fig. 6 a) [ 77 ]. In 10% ethanol solution, the probe showed an absorption band at 347 nm.…”

Section: Single Ion Sensormentioning

confidence: 99%

A Review on Metal Ion Sensors Derived from Chalcone Precursor

2022

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“…Wang et al 449 presents the preparation of a pyrazoline compound 328 (Fig. 288) for the determination of Hg 2+ with selectivity and sensitivity in the EtOH:H 2 O=9:1 (v/v) solution.…”

Section: Pyrazoline Based Hg 2+ Sensormentioning

confidence: 99%

Optical sensor: a promising strategy for environmental and biomedical monitoring of ionic species

2015

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There is fast growing research on designing and improving the metal recognition methodologies in the ecosystems and biological media. The fluorescent based techniques proved a mile stones for non-invasive metal sensation and quantification in the multichannel environment. Metals as the natural components of Earth's crust are generally present in trace concentrations in the environmental samples where the humic substances have complexation affinity toward them. Iron, zinc and copper are the 1 st , 2 nd and 3 rd adequate elements indispensable to the body in trace playing the crucial roles in many biological processes. However, the unregulated amounts either as excess or deficient may exacerbate deterioration to the vital organs and triggered the progression of complications. Beside these three essential elements, mercury is widely considered to be one of the most hazardous pollutants and highly dangerous elements due to its recognized accumulative and toxic characters in the environment and the ecosystem. In the current scenario, we have tried to summarize the maximum amount of recently developed fluorescent signaling materials for the Cu 2+ , Fe 2+ / Fe 3+ , Zn 2+ and Hg 2+ . The spectral shifting in the molecules on metal chelation, mode of complexation and stoichiometries of resulting adducts have been discussed in detail. Furthermore, the molecules which have been reported as intracellular metal detector via bioimaging are specifically highlighted that might be useful for the design and development of cell viable and membrane permeable molecular probes in the future perspective.

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“…В последние годы наметился интерес к флуоресцентным соединениям группы 1,3,5-триарил-2-пиразолина как основе хемосенсорных систем для анализа поливалентных металлов [15][16][17][18][19][20].…”

Section: Introductionunclassified

Derivatives of 1,3,5 triaryl-2-pyrazoline with additional heterocyclic moieties in position 1 as potential fluorescent chemosensing compounds for detection of polyvalent metals cations

2018

Chemical Series

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A series of 1,3,5-triaryl-2-pyrazoline derivatives with pyridine or 8'-hydroxyquinoline fragments in position 1 have been synthesized, some of which also contain a hydroxy group in the ortho-position of benzene ring-3, which makes possible the their OH-group proton phototransfer reaction to the nitrogen atom of pyrazoline cycle. The nitrogen atoms in molecules of the investigated compounds form chelate cavities, binding of the ions of polyvalent metals to which should lead to changes in the spectral characteristics. The spectral-luminescent properties of the synthesized compounds in solvents of different polarity and their interaction with salts of several polyvalent metals in acetonitrile were investigated. The proton phototransfer reaction was shown to result in significant fluorescence quenching, the most prominent for the derivative with the hydroxyquinoline fragment in position 1 of pyrazoline cycle. The proton transfer reaction rate constants vary within the interval of 2-4∙109 s-1 in aprotic solvents of different polarity. The prospects for application of the synthesized derivatives as fluorescent chemosensor compounds for the analysis of polyvalent metals were examined. In most of the studied cases, their interaction with heavy metal ions led to decrease of fluorescence intensity, however for compounds with intramolecular proton phototransfer reaction, no significant quenching by heavy metal ions was observed. The exception was the mercury ions, in the interaction with which compounds with proton phototransfer reaction demonstrated intensity redistribution of their two emission bands on the background of their general fluorescence quenching. The latter circumstance indicates the possibility of application of the modern methods of ratiometric fluorescence detection for the analysis of Hg2+ ions with their help.

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Novel Pyrazoline-Based Selective Fluorescent Sensor for Hg2+

Cited by 19 publications

References 36 publications

A Review on Metal Ion Sensors Derived from Chalcone Precursor

A Review on Metal Ion Sensors Derived from Chalcone Precursor

Optical sensor: a promising strategy for environmental and biomedical monitoring of ionic species

Derivatives of 1,3,5 triaryl-2-pyrazoline with additional heterocyclic moieties in position 1 as potential fluorescent chemosensing compounds for detection of polyvalent metals cations

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