Bicinchoninic acid-based colorimetric chemosensor for detection of low concentrations of cyanide

Biradar, Archana A.; Biradar, Ankush V.; Sun, Tiffany; Chan, Y.; Huang, Xiaoxi; Asefa, Tewodros

doi:10.1016/j.snb.2015.08.043

Cited by 12 publications

(3 citation statements)

References 50 publications

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“…The non-hindered character of the H 2 BCA molecule along the C ipso –C ipso bond would a priori facilitate the coordination and formation of novel MOFs. H 2 BCA is normally used in the detection of different species in water ( i.e., proteins or organic molecules) but also as a homogeneous co-catalyst [ i.e., with Pd(PhCN) 2 Cl 2 in the reductive amination of aldehydes or with CuCl 2 in the oxidation of alcohols] . Accordingly, it would be beneficial to integrate the H 2 BCA linker in an MOF to be used in the detection of interesting molecules or as heterogeneous catalyst in organic reactions.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols

Pérez

Morales-Cámara

García-Salas

et al. 2022

Crystal Growth & Design

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A new family of metal–organic frameworks (MOFs) named GR-MOFs with the chemical formula {[M x (BCA) y ](H2O) z (DMF) w } (x,y,z,w: 1,1,2,0; 1,1.5,0,1; 1,2,2,1; and 1,1,0,2 for GR-MOF-11 to 14, respectively) based on s-block [M: Sr (GR-MOF-11), Ba (GR-MOF-14)] and d-block [M: Y (GR-MOF-12) and Cd (GR-MOF-13)] metals together with the biquinoline ligand 2,2′-bicinchoninic acid (H2BCA) has been synthetized by a solvothermal route and fully characterized by elemental and thermogravimetric analysis, Fourier transform infrared spectroscopy, photoluminescence, particle size distribution through optical microscopy, electrophoretic mobility, and finally, X-ray single-crystal and powder diffraction. The structural characterization reveals that these 2D and 3D MOFs possess a rich variety of coordination modes that maintained the Janus-head topology on the ligand in most of the cases. The new MOFs were studied in the catalyzed cyanosilylation and hydroboration of an extensive group of aldehydes and ketones, wherein the s-block metal-based MOFs GR-MOF-11 and GR-MOF-14 provided the highest efficiency ever reported in the MOF-catalyzed cyanosilylation of carbonyl compounds by using only 0.5 mol % of catalyst loading, room temperature, and solvent-free conditions. Furthermore, the hydroboration of ketones has been reported for the first time with this type of s-block metal catalysts obtaining from moderate to good conversions.

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Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols

Pérez

Morales-Cámara

García-Salas

et al. 2022

Crystal Growth & Design

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“…To establish the optimal ratio between the copper sulfate pentahydrate used in a 4% aqueous solution and the BCA, which is useful to find even small traces of proteins on the surfaces, 4 test solutions, having Cu 2+ /BCA ratios equal to 1:25, 1:50, 1:100, and 1:200, respectively, were compared (Biradar and others ).…”

Section: Methodsmentioning

confidence: 99%

Development of a Method for Evaluating Floor Dry‐Cleanability from Wheat Flour in the Food Industry

Barreca

Cardinali

Borgese

et al. 2017

Journal of Food Science

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Many productive processes are characterized by inadequate protocols of sanitation that increase the possibility of proliferation of microbial contaminants, especially on surfaces. The use of this method for evaluating the degree of floor cleanability in agri-food companies is important not only to reduce the risk of contamination of products, but also to provide companies with a tool to identify critical issues. The method is based on the usage of bicinchoninic acid assay (BCA) in a solution at a 1:50 ratio of Cu /BCA, which is ideal for detecting the amount of proteins contained in wheat flour residues on industrial flooring. Spectrophotometric analysis allowed identifying maximum absorbance values at 562 nm for different protein concentrations, although the construction of a regression function led to the definition of the intervals of evaluation corresponding to different degrees of cleanliness from residues of wheat flour. The results of the absorbance curves, obtained by applying the proposed evaluation method to 6 tiles commonly used in agri-food buildings, showed the clear persistence of food material on 2 tiles with surface relief. In particular, such tiles showed a higher presence of proteins, with a level of contamination 440% higher. Furthermore, a robotic system was designed to standardize the cleaning method commonly employed in agri-food companies to remove solid particles from flooring.

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“…Consequently, there is considerable interest in the selective detection of aqueous cyanide at submicromolar levels by using simple and visual methods . As of today, various colorimetric and fluorometric receptors are known for the sensing of cyanide ions, in which many transition-metal complexes have been utilized . Nevertheless, fluorescent chemodosimeters based on specific chemical reactions always show better selectivity, and some of them display a detection limit at the submicromolar level for cyanide in organic solvents …”

Section: Introductionmentioning

confidence: 99%

A Highly Selective Chemosensor for Cyanide Derived from a Formyl-Functionalized Phosphorescent Iridium(III) Complex

et al. 2016

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A new phosphorescent iridium(III) complex, bis[2',6'-difluorophenyl-4-formylpyridinato-N,C4']iridium(III) (picolinate) (IrC), was synthesized, fully characterized by various spectroscopic techniques, and utilized for the detection of CN(-) on the basis of the widely known hypothesis of the formation of cyanohydrins. The solid-state structure of the developed IrC was authenticated by single-crystal X-ray diffraction. Notably, the iridium(III) complex exhibits intense red phosphorescence in the solid state at 298 K (ΦPL = 0.16) and faint emission in acetonitrile solution (ΦPL = 0.02). The cyanide anion binding properties with IrC in pure and aqueous acetonitrile solutions were systematically investigated using two different channels: i.e., by means of UV-vis absorption and photoluminescence. The addition of 2.0 equiv of cyanide to a solution of the iridium(III) complex in acetonitrile (c = 20 μM) visibly changes the color from orange to yellow. On the other hand, the PL intensity of IrC at 480 nm was dramatically enhanced ∼5.36 × 10(2)-fold within 100 s along with a strong signature of a blue shift of the emission by ∼155 nm with a detection limit of 2.16 × 10(-8) M. The cyanohydrin formation mechanism is further supported by results of a (1)H NMR titration of IrC with CN(-). As an integral part of this work, phosphorescent test strips have been constructed by impregnating Whatman filter paper with IrC for the trace detection of CN(-) in the contact mode, exhibiting a detection limit at the nanogram level (∼265 ng/mL). Finally, density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were performed to understand the electronic structure and the corresponding transitions involved in the designed phosphorescent iridium(III) complex probe and its cyanide adduct.

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Bicinchoninic acid-based colorimetric chemosensor for detection of low concentrations of cyanide

Cited by 12 publications

References 50 publications

Metal–Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols

Metal–Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols

Development of a Method for Evaluating Floor Dry‐Cleanability from Wheat Flour in the Food Industry

A Highly Selective Chemosensor for Cyanide Derived from a Formyl-Functionalized Phosphorescent Iridium(III) Complex

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