A fluorescent probe for both pH and Zn2+ based on 2-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenol

Ju, Chuan-Chuan; Yin, Hengfu; Yuan, Chui-Li; Wang, Kezhi

doi:10.1016/j.saa.2011.05.079

Cited by 22 publications

(8 citation statements)

References 51 publications

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“…Chromatography, 4 spectrophotometry, 5 fluorescence spectrometry, 6 capillary electrophoresis, 7 and chemiluminescence 8 are useful techniques for nitrite detection. These techniques have excellent sensitivity but along with some disadvantages involving relatively expensive equipment, cumbersome sample preparation, and toxic reagents.…”

Section: ■ Introductionmentioning

confidence: 99%

A Metal–Organic Gel-Carbon Nanotube Nanocomposite for Electrochemical Detection of Nitrite

Ding

Zhang

Chen

et al. 2021

ACS Appl. Electron. Mater.

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A nanocomposite material consisting of a copper ion-based metal–organic gel (MOG-Cu) and multiwalled carbon nanotubes (MWCNTs) was prepared and served to construct a sensor for electrochemical detection of nitrite. The micromorphology of the MOG-Cu-MWCNT nanocomposite was characterized. The effects of MWCNT doping on the formation of a Cu-based MOG and its electrochemical property for nitrite electro-oxidation were evaluated. It shows that the optimal amount of MWCNTs does not influence the formation and nanofiber structure of the Cu-based MOG but can increase the electrochemical surface area and facilitate the interfacial charge transport. Hence, the oxidation current of nitrite at the MOG-Cu-MWCNT-coated glass carbon electrode (GCE) is considerably enhanced in contrast to the MOG-Cu/GCE. The analytical performances of the MOG-Cu-MWCNTs/GCE for electrochemical detection of nitrite were investigated. Operated in optimum conditions, the oxidation peak current at a potential of about 0.77 V versus a saturated calomel electrode shows direct proportion correlation with concentration of nitrite. The linear range is 0.3–100 μM. The sensor demonstrates fair anti-interference capacity, high sensitivity, a low detection limit (0.086 μM), satisfactory reproducibility, and storage stability, being a valuable tool for the electrochemical monitoring of nitrite in food samples.

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Section: ■ Introductionmentioning

confidence: 99%

A Metal–Organic Gel-Carbon Nanotube Nanocomposite for Electrochemical Detection of Nitrite

Ding

Zhang

Chen

et al. 2021

ACS Appl. Electron. Mater.

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show abstract

“…Quando ocorre a formação do composto (2), observa-se um forte batocromismo de 319 nm para 339 nm, resultando na formação desse composto ao longo de 10 min de reação, promovendo uma emissão azul intensa. 46,49 Figura 15. Representação da ação da ALP sobre a sonda (1) que apresenta uma fluorescência azul sendo transformada em (2) que apresenta uma fluorescência verde forte A emissão de fluorescência em 525 nm é observada em diferentes concentrações de ALP em menos de 1 min.…”

Section: Sondas Empregadas No Diagnóstico De Doençasunclassified

Intramolecular Proton Transfer in the Excited State (ESIPT) Process: Applications in Fluorescent Probes

Rocha

Ramalho

2016

Revista Virtual De Química

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Currently the opportune diagnosis of cancer has shown a great importance, mainly by decreasing the mortality rate. Among the techniques employed to achieve the diagnosis, spectroscopy has been highlighted for presenting safe and highly accurate diagnoses. The Fluorescence Spectroscopy has become very important in cancer diagnosis, being employed in breast, oral cavity and esophagus cancer testing. The technique employs fluorophore which in many cases have groups capable of carrying out the intramolecular proton transfer in the excited state (ESIPT). These compounds may be used for various molecular targets such as cations, anions and proteins detection, besides the diagnosis of diseases. Spectroscopic probes have an important role in the development of more accurate diagnosing diseases methods, which may influence the treatment and avoid the risks of further surgery and patient death.

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“…To the best of our knowledge, a hugely limiting factor of the above rhodamine B probes is that they can detect only the same kind of analytes using fluorescence and UV-Vis absorption spectrometry method at the same time. Furthermore, although dual-function fluorescent chemosensors designed for detecting different metal ions are plentiful [54][55][56][57][58], for pH and metal ions using different optical signals are relatively few [59].…”

Section: Introductionmentioning

confidence: 99%

5-Hydroxymethylfurfural modified rhodamine B dual-function derivative: Highly sensitive and selective optical detection of pH and Cu2+

Wang

Zhou

Huang

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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A fluorescent probe for both pH and Zn2+ based on 2-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenol

Cited by 22 publications

References 51 publications

A Metal–Organic Gel-Carbon Nanotube Nanocomposite for Electrochemical Detection of Nitrite

A Metal–Organic Gel-Carbon Nanotube Nanocomposite for Electrochemical Detection of Nitrite

Intramolecular Proton Transfer in the Excited State (ESIPT) Process: Applications in Fluorescent Probes

5-Hydroxymethylfurfural modified rhodamine B dual-function derivative: Highly sensitive and selective optical detection of pH and Cu2+

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