scholarly journals A Novel Ruthenium(II) Polypyridyl Complex Bearing 1,8-Naphthyridine as a High Selectivity and Sensitivity Fluorescent Chemosensor for Cu2+ and Fe3+ Ions

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4032 ◽  
Author(s):  
Chixian He ◽  
Shiwen Yu ◽  
Shuye Ma ◽  
Zining Liu ◽  
Lifeng Yao ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Metal Ions ◽  
High Selectivity ◽  
Detection Limits ◽  
Fluorescent Chemosensor ◽  
Polypyridyl Complex ◽  
Elemental Analyses

A novel ruthenium(II) polypyridyl complex bearing 1,8-naphthyridine was successfully designed and synthesized. This complex was fully characterized by EI-HRMS, NMR, and elemental analyses. The recognition properties of the complex for various metal ions were investigated. The results suggested that the complex displayed high selectivity and sensitivity for Cu2+ and Fe3+ ions with good anti-interference in the CH3CN/H2O (1:1, v/v) solution. The fluorescent chemosensor showed obvious fluorescence quenching when the Cu2+ and Fe3+ ions were added. The detection limits of Cu2+ and Fe3+ were 39.9 nmol/L and 6.68 nmol/L, respectively. This study suggested that this Ru(II) polypyridyl complex can be used as a high selectivity and sensitivity fluorescent chemosensor for Cu2+ and Fe3+ ions.

scholarly journals Novel PSMA-Coated On-Off-On Fluorescent Chemosensor Based on Organic Dots with AIEgens for Detection of Copper (II), Iron (III) and Cysteine

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 786 ◽  
Author(s):  
Rui Jiang ◽  
Na Liu ◽  
Fan Li ◽  
Wensheng Fu ◽  
Yun Zhou ◽  
...  
Keyword(s):  
Metal Ions ◽  
High Selectivity ◽  
Detection Limits ◽  
Linear Range ◽  
Fluorescent Chemosensor ◽  
Fluorescent Detection ◽  
Precipitation Method ◽  
Wide Linear Range

Herein, a novel on-off-on fluorescent chemosensor for copper (II) ion (Cu2+), iron (III) ion (Fe3+) and cysteine is developed simply by the nano-precipitation method. The prepared organic dots with AIEgens (AIE dots) are advantageous over other metal ions in detecting Cu2+, Fe3+ with high selectivity and sensitivity by forming agglomerations (on-off). The agglomerations formed by AIE dots and Cu2+ redistributed and the fluorescence was obviously recovered in the presence of cysteine (off-on). This sensor has a wide linear range for Cu2+, Fe3+ and cysteine. The fluorescent detection limits of AIE dots are calculated to be 107 nM for Cu2+, 120 nM for Fe3+ and 78 nM for cysteine, respectively. These results indicate that the AIE dots can be used as a potential probe for Cu2+, Fe3+ and cysteine detection.

scholarly journals A water-soluble fluorescent chemosensor based on Asp functionalized naphthalimide for successive detection Fe3+ and H2PO4−

2018 ◽  
Vol 96 (4) ◽  
pp. 363-370 ◽  
Author(s):  
You-Ming Zhang ◽  
Xiao-Peng Chen ◽  
Guo-Yan Liang ◽  
Kai-Peng Zhong ◽  
Hong Yao ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Metal Ions ◽  
Aspartic Acid ◽  
High Selectivity ◽  
Fluorescent Sensor ◽  
Water Solution ◽  
Water Soluble ◽  
Selective Recognition ◽  
Actual Usage ◽  
Quenching Process

The selective recognition of target ions in water is very important and the development of novel water-soluble chemosensor is still an intriguing challenge. Herein, a novel water-soluble fluorescent sensor based on aspartic acid (Asp) functionalized 1,8-naphthalimide derivative (Asp-NI) has been designed and synthesized. The sensor Asp-NI could dissolve in water and successively detect Fe3+ and H2PO4− in water solution with high selectivity and sensitivity. The detection limits are 4.97 × 10−7 mol/L for Fe3+ and 5.27 × 10−6 mol/L for H2PO4−. Other coexistent competitive metal ions (Hg2+, Ag+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+, Cr3+, and Mg2+) showed no interference in the Fe3+ detection process. The sensor Asp-NI could act as a Fe3+ and H2PO4− controlled “On–Off–On” fluorescent switch. More interestingly, the Fe3+ induced fluorescence quenching process could be totally reversed by the addition of H2PO4−, this “On–Off–On” switching process could be repeated several times with little fluorescence loss. Notably, the actual usage of sensor Asp-NI was further demonstrated by test kits.

Fluorescent chemosensor: recognition of metal ions in aqueous medium by fluorescence quenching

2010 ◽  
Vol 69 (1-2) ◽  
pp. 119-129 ◽  
Author(s):  
Arvind Misra ◽  
Mohammad Shahid ◽  
Priyanka Srivastava ◽  
Pratibha Dwivedi
Keyword(s):  
Fluorescence Quenching ◽  
Metal Ions ◽  
Aqueous Medium ◽  
Fluorescent Chemosensor

Fluorescence chemosensor containing 4-methyl-7-coumarinyloxy, acetylhydrazono and N-phenylaza-15-crown-5 moieties for K+ and Ba2+ ions

2018 ◽  
Vol 24 (3) ◽  
pp. 141-145 ◽  
Author(s):  
Qiang Zhang ◽  
Kaifei Duan
Keyword(s):  
Metal Ions ◽  
Binding Constants ◽  
Detection Limits ◽  
Fluorescent Chemosensor ◽  
Fluorescent Sensing ◽  
Fluorescence Titration

AbstractA new aza-15-crown-5 derivative 1 bearing coumarin and hydrazone moieties was synthesized and characterized. The fluorescent sensing behavior and selectivity of 1 toward different metal ions in ethanol were investigated. There are 4-fold and 2-fold fluorescence enhancements of 1 at λem=406 nm upon addition of five equivalents of K+ and Ba2+, respectively. The fluorescence titration revealed the stoichiometry of 1:1 for 1-K+1-Ba2+ complexes and the binding constants (lgKs) of 4.11 for 1-K+ and 3.61 for 1-Ba2+. Compound 1 can be used as a fluorescent chemosensor for K+ and Ba2+ through discriminable photoresponse signals. The calculated detection limits for K+ and Ba2+ are 2.28 μm and 5.21 μm, respectively.

Sugar thiacrown-ether appended calix[4]arene as a selective chemosensor for Fe2+and Fe3+ions

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88038-88044 ◽  
Author(s):  
Irene Ling ◽  
Rauzah Hashim ◽  
Karem J. Sabah
Keyword(s):  
Metal Ions ◽  
High Selectivity ◽  
Fluorescent Chemosensor ◽  
Thiacrown Ether

A fluorescent chemosensor derived from sugar-thiacrown-ether appended calix[4]arene coupled with pyrene units was synthesized. Upon addition of Fe2+or Fe3+the fluorescence intensities are quenched indicating high selectivity for these metal ions.

The design of a simple fluorescent chemosensor for Al3+/Zn2+via two different approaches

2015 ◽  
Vol 7 (2) ◽  
pp. 716-722 ◽  
Author(s):  
Jing-can Qin ◽  
Long Fan ◽  
Bao-dui Wang ◽  
Zheng-yin Yang ◽  
Tian-rong Li
Keyword(s):  
Metal Ions ◽  
High Selectivity ◽  
Fluorescent Sensor ◽  
Fluorescent Chemosensor ◽  
Wide Range

In this study, we have developed a simple fluorescent sensor, 7-(2′,4′-dihydroxybenzylideneimino)-4-methyl coumarin, which shows a high selectivity towards Al3+/Zn2+over a wide range of metal ions.

scholarly journals Tuning the sensitivity towards mercury via cooperative binding to d-fructose: dual fluorescent chemosensor based on 1,8-naphthyridine-boronic acid derivative

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14862-14870
Author(s):  
Marina Rajadurai ◽  
E. Ramanjaneya Reddy
Keyword(s):  
Metal Ions ◽  
Acid Derivative ◽  
Boronic Acid ◽  
Toxic Metal ◽  
Fluorescent Chemosensor ◽  
Cooperative Binding ◽  
Toxic Metal Ions

This new dual d-fructose–mercury chemosensor is the first example of utilizing boronic acid–diol complexation for enhancement of the sensor's sensitivity towards toxic metal ions.

STRUCTURAL FEATURES, COMPUTATIONAL STUDIES AND BIOLOGICAL ANALYSIS: SCHIFF’S BASE LIGAND AND ITS COORDINATION COMPOUNDS

INDIAN DRUGS ◽  
2021 ◽  
Vol 58 (07) ◽  
pp. 22-31
Author(s):  
Seema Gautam ◽  
Sulekh Chandra ◽  
Jugmendra Singh ◽  
Navneet Manav ◽  
Vinod K Paliwal ◽  
...  
Keyword(s):  
Metal Ions ◽  
Coordination Compounds ◽  
Computational Study ◽  
Inhibition Zone ◽  
Antibacterial Activities ◽  
Structural Features ◽  
Schiff’S Base ◽  
H Nmr ◽  
Diffusion Technique ◽  
Elemental Analyses

Structure and biological application based analysis has been carried out for Schiff’s base ligand containing nitrogen and sulphur donor atoms and also for a series of its coordination compounds. Ligand benzil-bis(5-amino-1,3,4-thiadiazole-2-thiol) (L) has been prepared and structural features of ligand investigated by elemental analyses, IR, 1 H-NMR, mass spectra and molecular modeling studies. The chemical reaction of the prepared ligand with metal ions afforded mononuclear coordination compounds of Mn(II) and Co(II) metal ions. The characterization of the coordination compounds is being based on the techniques i.e. elemental analysis, infra-red, UV-visible as well as melting point, molar conductivity and magnetic moment measurement. A computational study has been done to understand the miscellaneous coordination modes of ligand to metal ions. Characterization result shows that coordination compounds exhibit a six coordinated geometrical arrangement i.e. octahedral geometry. The biological inhibition zone (antifungal and antibacterial activities) of synthesized compounds, i.e. ligand and its coordination compounds, has been monitored using well diffusion technique

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