scholarly journals Enhanced Zn2+ion-sensing behavior of a benzothiazole derivative on encapsulation by β-cyclodextrin

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15670-15677 ◽  
Author(s):  
Rajathi Queen Paulpandi ◽  
Sivaraj Ramasamy ◽  
Mosae Selvakumar Paulraj ◽  
F. Guillermo Díaz Baños ◽  
G. Villora ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Zinc Ions ◽  
Selective Binding ◽  
Benzothiazole Derivative ◽  
Ion Sensing ◽  
Enhanced Selectivity

We report, in this paper, a benzothiazole derivative which shows selective binding of zinc ions among a pool of metal ions and the enhanced selectivity of the same metal ion by the derivative in its β-cyclodextrin bound form.

Triazole-amide isosteric pyridine-based supramolecular gelators in metal ion and biothiol sensing with excellent performance in adsorption of heavy metal ions and picric acid from water

2019 ◽  
Vol 43 (2) ◽  
pp. 934-945 ◽  
Author(s):  
Atanu Panja ◽  
Kumaresh Ghosh
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Marked Effect ◽  
Picric Acid ◽  
Excellent Performance ◽  
Ion Sensing ◽  
Gelling Properties ◽  
Metal Ion Sensing

Pyridine-based gelators 1–4 of triazole-amide isosteric relationship have been considered in metal ion sensing, heavy metal and picric acid adsorption from water. The change from triazole to isosteric amide has marked effect on gelling properties of the gelators.

Graphene/ Graphene Oxide Based Pyrimidine Hybrid Materials for Metal Ion Sensing and DFT Study

2018 ◽  
Vol 1 (1) ◽  
pp. 228-235
Author(s):  
Pramanand Kumar ◽  
Chandramika Bora ◽  
Pradip K. Sukul ◽  
Subrata Das
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Hybrid Materials ◽  
Metal Ion ◽  
Density Functional ◽  
Analytical Techniques ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Ion Sensing ◽  
Device Applications

Chemical and biological sensors are gaining wide popularity in day-to-day life and significantly help to increase the survivability by providing early warning for explosives, metal pollutant, and chemical warfare. GR analog based sensor devices have several advantages for chemical and biological sensing. The structural or chemical modifications of GR remarkably improve the properties of such device applications. Keeping this in mind, we have designed and synthesized pyrimidinedione-functionalized graphene oxide (FGO) and functionalized graphene (FG) sequentially. Synthesis of the hybrid materials was done using the simple hydrothermal method. The materials were characterized by various spectroscopic and analytical techniques. XRD study showed formation of well exfoliated GO sheets in the composite. FTIR data indicates the formation of GO-NO-Ur composites. Density functional theory (DFT) calculation was also investigated to understand the various non-covalent interactions of the NO-Ur and FGO. For the detection of metal ions, synthesized nanocomposite was analyzed to sense many metal ions (Ag+, Cd2+, Cu2+, Fe3+, Hg2+, Mo2+, Ni2+, and Zn2+) and we observed strong binding mood against Fe3+ ions having LOD and LOQ value of 0.0032 μM and 0.01 μM respectively.

scholarly journals Pt(dithiolene)-Based Colorimetric Chemosensors for Multiple Metal-Ion Sensing

2021 ◽  
Vol 13 (15) ◽  
pp. 8160
Author(s):  
Heawon Son ◽  
Seohyeon Jang ◽  
Gayoung Lim ◽  
Taeyong Kim ◽  
Inho Nam ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Density Functional ◽  
Low Cost ◽  
Density Functional Theory Calculations ◽  
Transition Metal Ions ◽  
Field Analysis ◽  
Ion Sensing ◽  
Metal Ion Sensing

Colorimetric chemosensors are widely employed for in-field analysis to detect transition metal ions in real-time with the naked eye. Colorimetric chemosensors have attracted considerable attention because they can conveniently provide quantitative and qualitative information at a low cost. However, the development of colorimetric chemosensors for multiple-ion sensing where metal cations coexist has been limited. For this reason, we developed a new type of transition metal ion sensing material by selectively replacing functional groups on (diphosphine)Pt(dmit) molecules. The terminal groups of the diphosphine ligand were successfully substituted by the cyclohexyl groups, increasing the electron density of the thione moiety. Due to the electron donation ability of the cyclohexyl terminal groups, the proposed chemosensing material was able to selectively detect the mixture of Hg2+, Cu2+, and Ag+ in the presence of many types of interfering cations. To gain insight into the binding mechanisms between the metal ions and the developed (dchpe)Pt(dmit) molecule, density functional theory calculations were also performed.

Green and One-Pot Synthesis of Mint Derived Carbon Quantum Dots for Metal Ion Sensing

2021 ◽  
pp. 81-94
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Metal Ions ◽  
Crystalline Structure ◽  
Metal Ion ◽  
Fluorescence Emission ◽  
Carbon Quantum Dots ◽  
Morphological Properties ◽  
Quenching Effect ◽  
Ion Sensing

A green and simple synthesis of carbon quantum dots (CQDs) was derived from dried mint leaves by hydrothermal method. Crystalline structure of the synthesized CQDs was characterized with X-ray diffraction (XRD) method. The morphological properties of the CQDs were investigated with transmission electron microscopy (TEM). The optical behaviors of the CQDs were examined with fourier transfom infrared spectrophotometer (FT-IR), ultraviolet visible (UV-Vis) and photoluminescence spectrophotometer techniques. Crystalline structure of the CQDs was found as amorphous in nature and the average diameter of the CDs was calculated as 8.13 nm from TEM study. According to the fluorescence emission spectra of the samples, synthesized CQDs was sensitive to mainly Ag(I), Cr(III) and Fe(III) ions. Especially, Ag(I) was the most sensible compared to other metal ions. Quenching effect of the CQDs was also evaluated by using ascorbic acid to metal ions added CQDs samples. Ascorbic acid showed the quenching effect for all the metal ion added samples except Sn(II) ion.

The effect of pH and ligands on the sorption of heavy metal ions by cellulose

1978 ◽  
Vol 31 (7) ◽  
pp. 1501 ◽  
Author(s):  
H Farrah ◽  
WF Pickering
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Ethylenediaminetetraacetic Acid ◽  
Zinc Ions ◽  
Natural Systems ◽  
Ph Values ◽  
Hydrated Ions ◽  
Pka Value ◽  
Anionic Complexes ◽  
Copper Lead

The adsorption of copper, lead, cadmium and zinc ions by cellulose suspensions has been examined at pH values ranging from 3.5 to 11. The chemical form of the metal ions has been changed by adding ligands such as oxalic acid, citric acid, tartaric acid, ethylenediaminetetraacetic acid, ethylene- diamine, glycine, cysteine and α,α'-bipyridyl. Stable anionic complexes were not sorbed by the cellulose, and at a given pH cationic complexes were sorbed less than hydrated ions. The presence of excess ligand generally served to mask the precipitation of the metal- hydroxy species which can occur in the pH 6-7 region. ��� The amount of metal cation sorbed increased with pH. This has been attributed to increased ionization of acid functional groups having a pKa value of around 4.4. ��� The implication of the results, in respect to aqueous metal ion levels in natural systems, has been considered.

Mechanistic insights into heavy metal ion sensing by NOS2-macrocyclic fluorosensors via the structure-function relationship: influences of fluorophores, solvents and anions

The Analyst ◽  
2020 ◽  
Vol 145 (5) ◽  
pp. 1667-1676 ◽  
Author(s):  
Eunji Lee ◽  
Huiyeong Ju ◽  
In-Hyeok Park ◽  
Sunhong Park ◽  
Mari Ikeda ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Structure Function ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Solvent Interactions ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Function Relationship ◽  
Heavy Metal Ion Sensing

The sensing properties of heavy metal ions by macrocycle-based fluorosensors are sensitive not only to cation–receptors and cation–fluorophore interactions but also to cation–anion (endo/exo-coordination modes) and/or cation–solvent interactions.

scholarly journals Metal Ions Sensing by Biodots Prepared from DNA, RNA, and Nucleotides

Biosensors ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 333
Author(s):  
Maofei Wang ◽  
Masaki Tsukamoto ◽  
Vladimir G. Sergeyev ◽  
Anatoly Zinchenko
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Transition Metal Ions ◽  
Guanosine Monophosphate ◽  
Ion Concentration ◽  
Metal Nanostructures ◽  
Fluorescent Nanoparticles ◽  
Paper Strip ◽  
Ion Sensing ◽  
Metal Ion Sensing

Nucleic acids that exhibit a high affinity toward noble and transition metal ions have attracted growing attention in the fields of metal ion sensing, toxic metal ion removal, and the construction of functional metal nanostructures. In this study, fluorescent nanoparticles (biodots) were synthesized from DNA, RNA, and RNA nucleotides (AMP, GMP, UMP, and CMP) using a hydrothermal (HT) method, in order to study their metal ion sensing characteristics. The fluorescent properties of biodots differ markedly between those prepared from purine and pyrimidine nucleobases. All biodots demonstrate a high sensitivity to the presence of mercury cations (Hg2+), while biodots prepared from DNA, RNA, and guanosine monophosphate (GMP) are also sensitive to Ag+ and Cu2+ ions, but to a lesser extent. The obtained results show that biodots inherit the metal ion recognition properties of nucleobases, while the nucleobase composition of biodot precursors affects metal ion sensitivity and selectivity. A linear response of biodot fluorescence to Hg2+ concentration in solution was observed for AMP and GMP biodots in the range 0–250 μM, which can be used for the analytic detection of mercury ion concentration. A facile paper strip test was also developed that allows visual detection of mercury ions in solutions.

Alkaline-earth and aminonicotinate based coordination polymers with combined fluorescence/long-lasting phosphorescence and metal ion sensing response

2019 ◽  
Vol 7 (23) ◽  
pp. 6997-7012 ◽  
Author(s):  
Oier Pajuelo-Corral ◽  
Antonio Rodríguez-Diéguez ◽  
Garikoitz Beobide ◽  
Sonia Pérez-Yáñez ◽  
Jose A. García ◽  
...  
Keyword(s):  
Metal Ions ◽  
Coordination Polymers ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Blue Fluorescence ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Bright Blue Fluorescence ◽  
Bright Blue

Alkaline-earth and aminonicotinate based CPs exhibit green long lasting phosphorescence and bright blue fluorescence responsive to metal ions.

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