The C=S stretching vibration in the infrared spectra of some thiosemicarbazones

Wiles, D. M.; Gingras, B. A.; Suprunchuk, T.

doi:10.1139/v67-081

Cited by 113 publications

(40 citation statements)

References 10 publications

(3 reference statements)

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“…Upon excitation of the aqueous solution of DA at a wavelength 266 nm 44b using a xenon lamp source, emission occurs at B320 nm. However, the IR data for the DA-Cys system in alkaline pH shows a weak band at 480-600 cm À1 for -C-S bond and a broad band at 1106 cm À1 for -CQS 49 [Fig. 1].…”

Section: Resultsmentioning

confidence: 99%

Intriguing cysteine induced improvement of the emissive property of carbon dots with sensing applications

Jana

Ganguly

Pal

2015

Phys. Chem. Chem. Phys.

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A simple fluorometric technique has been adopted for cysteine (Cys) sensing in alkaline medium down to the nM level. The huge fluorescent signal of the solution is a consequence of fluorescent carbon dots (CDs) produced in situ from modified hydrothermal (MHT) reaction between Cys and dopamine (DA). It has been observed that the inherent fluorescence of DA is drastically quenched in alkaline solution. Cys can selectively rescue the fluorescence of DA. Thus, Cys determination in a straightforward way, but only to a micro molar (10(-7) M i.e. 0.1 μM) level is possible through such fluorescence enhancement. Sensitive Cys determination remains associated with the in situ generated CDs, but the external addition of pre-formed CDs to Cys solution fails miserably towards Cys detection. However, CDs prepared from the Cys-DA system in alkaline solution admirably increase the limit of detection (LOD) of Cys at least two orders higher (10(-9) M) than that observed without hydrothermal technique i.e., without CDs. This method finds applications for Cys determination in biological samples and pharmaceutical preparations.

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Section: Resultsmentioning

confidence: 99%

Intriguing cysteine induced improvement of the emissive property of carbon dots with sensing applications

Jana

Ganguly

Pal

2015

Phys. Chem. Chem. Phys.

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“…6 showed that the decreasing intensity of CN and C=S groups and new peak appeared at 998 cm -1 after adding the HgI2 salt solution .These peaks were referring to binding peak between Hg and thiourea moiety [17]. The region of NH group also showed some shifted in frequency.…”

Section: Binding Behaviors For Compound 3 Towards Some Selected Metalmentioning

confidence: 90%

A New Thiourea Compound as Potential Ionophore for Metal Ion Sensor

et al. 2018

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“…The IR spectra of powdered ligand (1) are in accordance to the literature data for the same type of compounds [23], namely the m(NAH) stretching is observed as two broad bands at 3333 and 3147 cm À1 while the characteristic intense bands at ca. is observed at 1115 cm À1 as a strong absorption; the C@S contribution is also attributed to a medium intensity band at 1020 cm À1 [33].…”

Section: Ir Spectral Datamentioning

confidence: 91%