A highly efficient and selective coumarin based fluorescent probe for colorimetric detection of Fe3+and fluorescence dual sensing of Zn2+and Cu2+

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63837-63847 ◽  
Author(s):  
Nayan Roy ◽  
Surjatapa Nath ◽  
Abhijit Dutta ◽  
Paritosh Mondal ◽  
Pradip C. Paul ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Colorimetric Detection ◽  
Logic Function ◽  
Nmr Titration ◽  
Esi Ms ◽  
Binary Logic ◽  
H Nmr ◽  
Dual Sensing

A new coumarin based Schiff-base chemosensor was synthesized and evaluated. Based on Job’s plot,1H NMR titration, ESI-MS and B-H plot, the structure of ligand and its metal ion is 1 : 1 stoichiometry. It also exhibits a binary logic function.

A highly selective fluorescent chemosensor for Al(III) ions based on 2-hydroxy-1-naphthaldehyde derivative

2019 ◽  
Vol 97 (5) ◽  
pp. 387-391 ◽  
Author(s):  
Jiayi Sun ◽  
Min Zhang ◽  
Changyan Sun
Keyword(s):  
Mass Spectrometry ◽  
Schiff Base ◽  
Excited State ◽  
Intramolecular Proton Transfer ◽  
Fluorescent Chemosensor ◽  
Hydroxyl Groups ◽  
Ionization Mass ◽  
Nmr Titration ◽  
H Nmr ◽  
Base Derivative

This manuscript reports the synthesis and fluorescent chemosensor property of a Schiff base derivative, 4-[(2-hydroxy-1-naphthyl) methylideneamino]benzoic acid (H2L). The fluorescence spectrum shows that H2L exhibits a highly selective and sensitive recognition for Al3+ ions in N,N′-dimethylformamide/water (DMF/H2O, 1/1, v/v). The fluorescence titration experiments and electrospray ionization mass spectrometry (ESI–MS) show that H2L and Al3+ ions form a 1:1 complex. 1H NMR titration results show that H2L coordinates to Al3+ ions with carboxylate, hydroxyl groups, and imine groups and the probable sensing mechanism may be the excited-state intramolecular proton transfer (ESIPT) process.

Dual sensing of methionine and aspartic acid in aqueous medium by quinoline based fluorescent probe

2021 ◽  
Author(s):  
Elamathi Chennakrishnan ◽  
R. J. Butcher ◽  
Mohankumar Amirthalingam ◽  
Palanisamy Sundararaj ◽  
Kuppanagounder Elango ◽  
...  
Keyword(s):  
Schiff Base ◽  
Aqueous Medium ◽  
Fluorescent Probe ◽  
Aspartic Acid ◽  
Copper Ion ◽  
Selective Detection ◽  
Dual Sensing

Quinoline based Schiff base 6-methyl-2-oxo-1,2-dihydro-quinoline-3carboxaldehyde-4(N)-phenylsemicarbazone (6MPS) sensor has been developed for selective sensing of methionine and aspartic acid in aqueous medium through selective detection of copper ion as “on-off-on” type....

scholarly journals Synthesis, Physical Characterization of M(III) Transition Metal Complexes Derived from Thiodihydrazide and 5-tert-Butyl-2-hydroxy-3-(3-phenylpent-3-yl) Benzaldehyde

2012 ◽  
Vol 9 (4) ◽  
pp. 2119-2127 ◽  
Author(s):  
Gajendra Kumar ◽  
Rajeev Johari ◽  
Shoma Devi
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Base Ligand ◽  
Metal Ion ◽  
Magnetic Measurements ◽  
Metal Salt ◽  
Magnetic Moments ◽  
Metal Centers ◽  
H Nmr

A Schiff base ligand was synthesized by reacting 5-tert-butl-2-hydroxy-3-(3-phenylpent-3-yl) benzaldehyde and thiodihydrazide (2:1) and a series of metal complexes with this new ligand were synthesized by reaction with Cr (III), Mn (III), and Fe (III) metal salt in methanolic medium. The Schiff base ligand and its complexes have been characterized with the help of elemental analysis, conductance measurements, magnetic measurements and their structure configuration have been determined by various spectroscopic (electronic, IR,1H NMR,13C NMR, GCMS) techniques. Electronic and magnetic moments of the complexes indicate that the geometries of the metal centers were octahedral. IR spectral data suggest that ligand behaves as a tetradentate ligand with ONNO donor sequence towards the metal ion.

Dual in vitro and in silico analysis of thiacalix[4]arene dinaphthalene sulfonate for the sensing of 4-nitrotoluene and 2,3-dinitrotoluene

2018 ◽  
Vol 42 (4) ◽  
pp. 2682-2691 ◽  
Author(s):  
Krunal Modi ◽  
Urvi Panchal ◽  
Chirag Patel ◽  
Keyur Bhatt ◽  
Shuvankar Dey ◽  
...  
Keyword(s):  
In Silico ◽  
In Silico Analysis ◽  
Nmr Titration ◽  
Esi Ms ◽  
H Nmr ◽  
Fluorescence Quencher ◽  
Silico Analysis

A newly synthesized thiacalix[4]arene dinaphthalene sulfonate, i.e., TCDNS, has been used as a fluorescence quencher for 2,3-DNT as well as 4-NT. The complex was analyzed by ESI-MS and 1H-NMR titration, which has been further confirmed by the in silico study.

A Schiff base receptor as a fluorescence turn-on sensor for Ni2+ ions in living cells and logic gate application

2018 ◽  
Vol 42 (4) ◽  
pp. 2865-2873 ◽  
Author(s):  
Gujuluva Gangatharan Vinoth Kumar ◽  
Mookkandi Palsamy Kesavan ◽  
Murugesan Sankarganesh ◽  
Kathiresan Sakthipandi ◽  
Jegathalaprathaban Rajesh ◽  
...  
Keyword(s):  
Schiff Base ◽  
Logic Gate ◽  
Living Cells ◽  
Esi Ms ◽  
H Nmr ◽  
Turn On ◽  
Fluorescence Turn On ◽  
C Nmr

A new receptor (R) with easily available “off–on–off” colorimetric and fluorescent responses was synthesized and characterized using 1H NMR, 13C NMR, and ESI-MS studies.

scholarly journals Colorimetric detection of hydrogen peroxide by dioxido-vanadium(V) complex containing hydrazone ligand: synthesis and crystal structure

2018 ◽  
Vol 5 (3) ◽  
pp. 171471 ◽  
Author(s):  
Sunshine D. Kurbah ◽  
Ibanphylla Syiemlieh ◽  
Ram A. Lal
Keyword(s):  
Metal Ion ◽  
Colorimetric Detection ◽  
Hydrazone Ligand ◽  
Synthesis And Crystal Structure ◽  
Cell Parameters ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Pyramidal Geometry ◽  
Uv Visible ◽  
Square Pyramidal Geometry

Dioxido-vanadium(V) complex has been synthesized in good yield, the complex was characterized by IR, UV–visible and 1 H NMR spectroscopy. Single crystal X-ray crystallography techniques were used to assign the structure of the complex. Complex crystallized with monoclinic P 2 1 /c space group with cell parameters a (Å) = 39.516(5), b (Å) = 6.2571(11), c (Å) = 17.424(2), α (°) = 90, β (°) = 102.668(12) and γ (°) = 90. The hydrazone ligand is coordinate to metal ion in tridentate fashion through –ONO– donor atoms forming a distorted square pyramidal geometry around the metal ion.

Simple naked-eye colorimetric chemosensors based on Schiff-base for selective sensing of cyanide and fluoride ions

2016 ◽  
Vol 94 (7) ◽  
pp. 631-636 ◽  
Author(s):  
Asadollah Mohammadi ◽  
Jeyran Jabbari
Keyword(s):  
Schiff Base ◽  
Anion Binding ◽  
Fluoride Ions ◽  
Nmr Titration ◽  
Design And Synthesis ◽  
H Nmr ◽  
Naked Eye ◽  
Mechanism Of Interaction ◽  
Spectroscopic Instrumentation ◽  
Electron Withdrawing Group

The present work describes the design and synthesis of simple colorimetric chemosensors based on Schiff-base for highly selective sensing of cyanide and fluoride ions. The chemosensor S2, containing an electron withdrawing group (EWG), displayed selective sensing properties for both cyanide and fluoride ions. The interaction of S2 with F– and CN– ions provides remarkable colorimetric responses from yellow to purple, enabling naked-eye sensing without any spectroscopic instrumentation. The mechanism of anion binding with chemosensor S2 showed one-to-one stoichiometry by Job’s plot. The mechanism of interaction between the S2 and CN– ions has been confirmed by the 1H NMR titration experiments. Furthermore, the detection limits of chemosensor S2 towards F– and CN– ions were found to be 3.7 and 1.2 μmol/L, respectively.

Effects of Saccharomyces Cerevisiae Strains on Chemical Profiles of Cabernet Sauvignon Wines: Based on the Combined Results of 1H NMR, HS-SPME/GC-MS and HPLC-DAD-ESI-MS/MS

2018 ◽  
Vol 18 (2) ◽  
pp. 115-131
Author(s):  
Liang Heng-Yu ◽  
Su Ning ◽  
Guo Kun ◽  
Wang Yuan ◽  
Yang De-Yu
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Principal Component ◽  
Grape Juice ◽  
Pilot Scale ◽  
Ethyl Esters ◽  
Cabernet Sauvignon ◽  
Esi Ms ◽  
H Nmr ◽  
Chemical Profiles ◽  
Indigenous Yeasts

Five Saccharomyces cerevisiae strains (Chinese indigenous yeasts SC5, WC5, SC8, CC17 and commercial starter F15) were inoculated into Cabernet sauvignon grape must and fermented at pilot scale. For the first time, combination of 1H NMR, HS-SPME/GC-MS and HPLC-DAD-ESI-MS/MS metabonomic profiling techniques was performed to analyze the global chemical fingerprints of sampled wines at the end of alcoholic and malolactic fermentation respectively, then 13 non-volatile flavor compounds, 52 volatile organic aromas and 43 polyphenolic molecules were identified and determined correspondently. All principal component analysis (PCA) of two fermentation stages based on the analytical results of 1H NMR, HS-SPME/GC-MS and HPLC-DAD-ESI-MS/MS divided these strains into three clusters: (1) SC5 and SC8, (2) WC5 and F15 and (3) CC17. The wine fermented by indigenous yeast, CC17, showed a very unique chemical profile, such as low pH and high color intensity, reduced amino acids (including proline) and the lowest total higher alcohols levels, most of the fixed acids, glycerol, ethyl esters and anthocyanins concentrations. The statistical results indicate that CC17 strain possesses very special anabolism and catabolism abilities on such substances in grape juice and has potentiality to produce characteristic wines with high qualities.

Azaoxa Macrocyclic and Acyclic Complexesof Lanthanides

1998 ◽  
Vol 63 (3) ◽  
pp. 363-370 ◽  
Author(s):  
Violetta Patroniak-Krzyminiewska ◽  
Wanda Radecka-Paryzek
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Macrocyclic Ligand ◽  
Lanthanide Ions ◽  
H Nmr ◽  
Elemental Analyses ◽  
Acyclic Complexes ◽  
Schiff Base Cyclocondensation

The template reactions of 2,6-diacetylpyridine with 3,6-dioxaoctane-1,8-diamine in the presence of dysprosium(III), thulium(III) and lutetium(III) chlorides and erbium(III) perchlorate produce the complexes of 15-membered macrocyclic ligand with an N3O2 set of donor atoms as a result of the [1+1] Schiff base cyclocondensation. In contrast, analogous reactions involving the lighter lanthanide ions (lanthanum(III), samarium(III) and europium(III)) yield the acyclic complexes with terminal acetylpyridyl groupings as products of the partial [2+1] condensation. The complexes were characterized by spectral data (IR, UV-VIS, 1H NMR, MS), and thermogravimetric and elemental analyses.

Efficient Preconcentration of Cu2+, Zn2+ and Fe3+ with an Agarose-Schiff Base Sorbent

2007 ◽  
Vol 72 (7) ◽  
pp. 908-916 ◽  
Author(s):  
Payman Hashemi ◽  
Hatam Hassanvand ◽  
Hossain Naeimi
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Metal Ion ◽  
Good Accuracy ◽  
Kinetic Studies ◽  
Sample Volume ◽  
Effects Of Ph ◽  
Glass Column ◽  
High Concentrations ◽  
Ph Range

Sorption and preconcentration of Cu2+, Zn2+ and Fe3+ on a salen-type Schiff base, 2,2'- [ethane-1,2-diylbis(nitrilomethylidyne)]bis(2-methylphenol), chemically immobilized on a highly crosslinked agarose support, were studied. Kinetic studies showed higher sorption rates of Cu2+ and Fe3+ in comparison with Zn2+. Half-times (t1/2) of 31, 106 and 58 s were obtained for sorption of Cu2+, Zn2+ and Fe3+ by the sorbent, respectively. Effects of pH, eluent concentration and volume, ionic strength, buffer concentration, sample volume and interferences on the recovery of the metal ions were investigated. A 5-ml portion of 0.4 M HCl solution was sufficient for quantitative elution of the metal ions from 0.5 ml of the sorbent packed in a 6.5 mm i.d. glass column. Quantitative recoveries were obtained in a pH range 5.5-6.5 for all the analytes. The volumes to be concentrated exceeding 500 ml, ionic strengths as high as 0.5 mol l-1, and acetate buffer concentrations up to 0.3 mol l-1 for Zn2+ and 0.4 mol l-1 for Cu2+ and Fe3+ did not have any significant effect on the recoveries. The system tolerated relatively high concentrations of diverse ions. Preconcentration factors up to 100 and detection limits of 0.31, 0.16 and 1.73 μg l-1 were obtained for Cu2+, Zn2+ and Fe3+, respectively, for their determination by a flame AAS instrument. The method was successfully applied to the metal ion determinations in several river water samples with good accuracy.

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