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Rationally Designed Imidazole Derivative as Colorimetric and Fluorometric Sensor for Selective, Qualitative and Quantitative Cyanide Ion Detection in Real Time Samples

Rationally Designed Imidazole Derivative as Colorimetric and Fluorometric Sensor for Selective, Qualitative and Quantitative Cyanide Ion Detection in Real Time Samples

R Bhaskar, V Vijayakumar, Venkatesan Srinivasadesikan, Shyi-Long Lee, S Sarveswari

Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jun 15;234:118212.

PMID: 32224435

Abstract:

A new imidazole derivative of 1,2-diaminoanthraquinone and fluorene-2-carboxaldehyde was designed as a sensor B2 to selectively detect the cyanide (CN-) ion through colorimetric and/or fluorometric methods. The photochemical characterizations of sensor B2 were tested using absorption and emission spectral studies in CH3CN-H2O (8:2) semi-aqueous medium. An excited state proton transfer process (ESIPT) was proved by theoretical and spectral studies. The colorimetric and fluorescence detection limit of CN- ion was found to be 5.3 × 10-6 M and 4.11 × 10-8 M, respectively. 1H NMR titration, electrochemical and DFT studies were supported the removal of -NH proton from B2. In order to utilize this sensor in real-time applications, we developed a test cassette which is coated with sensor B2 detected the presence of CN- ion in the food sample with endogenous cyanide ion.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP30084903	Fluorene-2-carboxaldehyde		30084-90-3	Price

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