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.

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.

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.

scholarly journals Functionalization of Macrobicyclic Amino Cryptands With Photoactive Fluorophoric Units for Metal Ion Sensing Application

2019 ◽  
Vol 9 (1S4) ◽  
pp. 811-814
Keyword(s):  
Transition Metal ◽  
Metal Ion ◽  
Transition Metal Ions ◽  
Ion Sensors ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Photophysical Studies ◽  
Sensing Application ◽  
L1 And L2 ◽  
Metal Ion Sensors

In this report we discussed the photo physical properties of two hexaanthryl substituted cryptands, L1 and L2 respectively. Further, photophysical studies of L1 and L2 with different transition metal ions as an input are carried out to probe these molecules as metal ion sensors in solution.

Two-stage metal ion sensing by through-space and through-bond charge transfer

2020 ◽  
Vol 8 (40) ◽  
pp. 14028-14036
Author(s):  
Guoxin Yin ◽  
Yu Wang ◽  
Yuping Yuan ◽  
Ruxue Li ◽  
Rui Chen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Transition Metal Ions ◽  
Iron Ion ◽  
Two Stage ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Bond Charge

A highly selective colorimetric and ratiometric “two-stage”/“off–on” type fluorescent probe with an ability to exclude other heavy and transition metal ions has been designed and synthesized for iron ion detection.

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.

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.

Use of agro-waste (Musa paradisiaca peels) as a sustainable biosorbent for toxic metal ions removal from contaminated water

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Equilibrium Concentration ◽  
Ion Concentration ◽  
Contaminated Water ◽  
Musa Paradisiaca ◽  
Percentage Removal ◽  
Adsorbent Dose

A study of removal of heavy metal ions from heavy metal contaminated water using agro-waste was carried out with Musa paradisiaca peels as test adsorbent. The study was carried by adding known quantities of lead (II) ions and cadmium (II) ions each and respectively into specific volume of water and adding specific dose of the test adsorbent into the heavy metal ion solution, and the mixture was agitated for a specific period of time and then the concentration of the metal ion remaining in the solution was determined with Perkin Elmer Atomic absorption spectrophotometer model 2380. The effect of contact time, initial adsorbate concentration, adsorbent dose, pH and temperature were considered. From the effect of contact time results equilibrium concentration was established at 60minutes. The percentage removal of these metal ions studied, were all above 90%. Adsorption and percentage removal of Pb2+ and Cd2+ from their aqueous solutions were affected by change in initial metal ion concentration, adsorbent dose pH and temperature. Adsorption isotherm studies confirmed the adsorption of the metal ions on the test adsorbent with good mathematical fits into Langmuir and Freundlich adsorption isotherms. Regression correlation (R2) values of the isotherm plots are all positive (>0.9), which suggests too, that the adsorption fitted into the isotherms considered.

One-step synthesis of PCL/Mg Janus micromotor for precious metal ion sensing, removal and recycling

2019 ◽  
Vol 54 (9) ◽  
pp. 7322-7332 ◽  
Author(s):  
Dongmei Zhang ◽  
Dan Wang ◽  
Jieai Li ◽  
Xiaoyi Xu ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Precious Metal ◽  
Metal Ion ◽  
Ion Sensing ◽  
One Step ◽  
Metal Ion Sensing
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