An infrared spectroscopic based method for mercury(II) detection in aqueous solutions

Functionalized graphene oxide materials for the fluorometric sensing of various analytes: a mini review

“…[58][59][60][61][62] The synthesized sensor conjugates are the most attractive and can be employed for the recognition of several target molecules and ions on account of their favorable characteristics, such as simplicity and specificity, sharp absorption and fluorescence emission, high fluorescence quantum yields, low toxicity, highly stability, cost-effective, and good water solubility. [49][50][51][52][53]56,57 To the best of our knowledge, this is the first and foremost review report discussing the fluorescent-functionalized GO/rGO nanomaterials for the detection of multifarious analytes. This review covers the general properties, synthesis, and utilization of GO/rGO-based fluorescent chemosensor conjugates for the sensitive and specific detection of various analytes such as metal cations (Ag + , Ce 3+ , Cu 2+ , Fe 2+ , Fe 3+ , Hg 2+ , Ni 2+ , Pb 2+ , Zn 2+ , and Zr 4+ ), anions (F À and I À ), amino acids (adenosine, cysteine, and lysine), carbohydrates (glucose), explosives (2,4,6trinitrotoluene and 2,4-dinitrotoluene), organic pollutants (bisphenol A, 1-naphthol, phenol, and picric acid), organic dyes (rhodamine 6G and neutral red), antibiotics (doxorubicin), RNA (miRNA), lectins, and viruses (Ebola) (Fig.…”

“…[46][47][48] These graphene-based nanomaterials as fluorescent chemosensors are being invented for the quick and sensitive recognition of the various types of analytes based on the strength of their remarkable characteristics, such as inexpensiveness, water-solubility, greater stability, high specific surface areas, biocompatibility, lower cytotoxicity, high electron mobilities, and extraordinarily low electronic noise. [49][50][51][52][53] The chemically modulated and conjugated GO-based nanomaterials manifest efficient noncovalent interactions with the adsorbed molecules via supramolecular interactions such as hydrogen bonding, intramolecular p-p interaction, and electrostatic attraction. Therefore, the tunable and intrinsic qualities of GO-based materials attract manifold applications in the discipline of fluorescent chemosensors as an outstanding fluorophore as well as a potential dual nature fluorescence quencher via charge transfer or resonance energy transfer processes.…”

A novel coumarin-derived dithioacetal chemosensor for trace detection of Hg2+ in real water samples

“…In the last few decades, significant efforts have been made to quantify mercury species, and many methods have been reported, such as atomic absorption-emission spectroscopy, 8 polarography, 9 reversed-phase high-performance liquid chromatography, 10 and infrared spectroscopy. 11,12 Unfortunately, most of these methods are not appropriate for real-time and on-site assays and require expensive devices and complicated sample preparation. In recent years, chemosensors for detecting mercury ions have attracted great attention due to their high selectivity and excellent sensitivity.…”

Estigmas del maíz como sustrato para remoción de mercurio en aguas contaminadas

“…Luego de la interacción del mercurio acuoso con la fibra, en la curva FT-IR se observó estiramiento de grupo amino secundario (-NH-) en la zona de 3298.28, así mismo, desapareció el pico del grupo alqueno en 2326.15 debido probablemente a un enlace C=C (Abdullah et al, 2016). Como ha sido reportado (Chandrasoma et al, 2012), los picos 1639.49 y 1578 que se muestran en la curva roja demostrarían la existencia de mercurio en la superficie en forma de HgCl2.…”