Spectroscopic and thermal nonlinearity study of a Schiff base compound

Almashal, Faeza Abdul Kareem; Mohammed, Mohammed Qasim; Hassan, Qusay M.A.; Emshary, C.A.; Sultan, H.A.; Dhumad, Adil Muala

doi:10.1016/j.optmat.2020.109703

Cited by 50 publications

(15 citation statements)

References 57 publications

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“…2-aminomethyl-3,4-ethylenedioxythiophene (EDOT-MeNH 2 ) (0.55 g, 2 mmol) and salicylaldehyde (0.24 g, 2 mmol) were dissolved in 20 ml of methanol with 2-3 drops of acetic acid as a catalyst under continuous stirring and then refluxed for 5 h according to the procedure described in the literature (Almashal et al 2020). The reaction was monitored via thin-layer chromatography.…”

Section: Preparation Of Pedot/schiff Ligandmentioning

confidence: 99%

Use of a Schiff base-modified conducting polymer electrode for electrochemical assay of Cd(II) and Pb(II) ions by square wave voltammetry

et al. 2021

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The work herein describes the electrochemical detection of heavy metal ions, specifically cadmium and lead. The introduction and modification of functional groups such as Schiff bases leads to an enhanced sensitivity of the electrode to analytes. In this study, a platinum electrode has, for the first time, been modified with poly(3,4ethylenedioxythiophene) (PEDOT/Schiff base) in CH 2 Cl 2 containing Bu 4 NPF 6 to detect cadmium (II) and lead (II) ions. The structures and morphologies of the polymer coatings were characterised via Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. The electrochemical synthesis and redox state response in monomer-free synthesised films have been studied via cyclic voltammetry. Moreover, the effect of scan rate on the electrochemical behaviour of the modified electrodes was also studied. The voltammetric findings have been used to calculate the surface coverage required for the polymer films and the stability of polymer electrodes in the monomer-free solutions. Square wave voltammetry (SWV) was applied for the determination of cadmium (II) and lead (II) ion concentrations and to assess the effects of pH on aqueous samples. The limits of detection for the modified electrode for cadmium (II) and lead (II) were found to be 0.95 μg L -1 and 1.84 μg L -1 , respectively. These findings revealed that modified films can be considered good candidates for application in electrochemical detection devices.

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Section: Preparation Of Pedot/schiff Ligandmentioning

confidence: 99%

Use of a Schiff base-modified conducting polymer electrode for electrochemical assay of Cd(II) and Pb(II) ions by square wave voltammetry

et al. 2021

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“…Preparation of PEDOT/Schiff ligand [30] 2-aminomethyl-3,4-ethylenedioxythiophene (EDOT-MeNH 2 ) (0.55 g, 2 mmol) and salicylaldehyde (0.24 g, 2 mmol) was dissolved in 20 ml of methanol with 2-3 drops of acetic acid as a catalyst under continuous stirring and was re uxed for 5 h [30]. The reaction was monitored via thin-layer chromatography.…”

Section: Preparation Of Stock Solutionsmentioning

confidence: 99%

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

Mohammed

Ismail²,

Alesary³

et al. 2021

Preprint

Self Cite

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The work herein concentrates on the electrochemical detection of heavy metal ions, specifically cadmium and lead ions. The introduction and modification of functional groups such as Schiff bases had led to an enhanced sensitivity of the electrode to analytes. In this study, a platinum electrode has for the first time been modified with poly(3,4- ethylenedioxythiophene) (PEDOT/Schiff base) in CH2Cl2 containing Bu4NPF6 for use to detection cadmium (II) and lead (II) ions. The structure and morphology of the polymer coatings were characterised by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. The electrochemical synthesis and redox state response in monomer-free synthesised films have been studied by cyclic voltammetry. Moreover, the effect of scan rate on the electrochemical behaviour of the modified electrodes was also studied. The voltammetric findings have been used to calculate the surface coverage required for the polymer films and the stability of polymer electrodes in the monomer-free solutions. Square wave voltammetry (SWV) was applied for the determination of cadmium (II) and lead (II) ion concentrations and to assess the effects of pH on aqueous samples. The limits of detection for the modified electrode for cadmium (II) and lead (II) were found to be 0.95 μg L-1 and 1.84 μg L-1, respectively. These findings revealed that modified films can be considered good candidates for application in electrochemical detection devices

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“…People’s vision has gradually shifted from inorganic materials to organic materials. Organic nonlinear materials are popular because of their high nonlinear optical absorption coefficient, fast response, and easy modification. , For example, Schiff base compounds, azo compounds, and a series of other organic molecular materials with large π conjugated structures have low dielectric constants, easy modification and combination, and organic nonlinear materials with variable structures can be obtained by molecular design and synthesis. − Schiff base materials are formed by the condensation of primary amine and carbonyl compounds, and the carbon nitrogen double bond can be used as a π electron bridge to construct a large π conjugated system, which greatly improves the mobility of intramolecular carriers and makes the whole system have a greater nonlinear optical response. ,, In addition to organic small molecular materials, nonlinear polymer materials, such as polyacetylene (PA), polythiophene (PTH), polyaniline (PANI), and their derivatives, have become a research hotspot due to their high nonlinear optical coefficient, fast response time, excellent processing performance, and structural diversity. − …”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Properties of Pyrene Derivatives Based on a Donor–Acceptor Structure and Its Polyurethane Composites

Gao

et al. 2022

ACS Omega

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Two pyrenyl Schiff base derivatives with π conjugated structures ( B2 and B3 ) were designed and synthesized. Then, B2 and B3 were added into polyurethane to obtain doped and bonded polyurethane nonlinear optical materials ( B2 /PU and B3 /PU), respectively. The synthesized B2 , B3 , and polyurethane nonlinear optical materials were tested by a nanosecond (ns) and picosecond (ps) pulse Z -scan at a 532 nm wavelength. Due to the two-photon absorption-induced excited state absorption (TPA-ESA), B2 , B3 , and polyurethane nonlinear optical materials show reverse saturable absorption (RSA). From a quantum chemistry calculation, it can be concluded that the RSA of B2 and B3 comes from the large π conjugated system and intramolecular charge transfer. Furthermore, B2 , B3 , and the polyurethane nonlinear optical materials show good optical limiting. B2 /PU and B3 /PU not only have excellent nonlinear optical properties but also have good transmittance, thermal stability, and processability of polyurethane materials. The combination of pyrenyl Schiff base derivatives and polyurethane materials greatly improves the application of nonlinear small molecules in the field of optical limiting and all-optical switching.

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Spectroscopic and thermal nonlinearity study of a Schiff base compound

Cited by 50 publications

References 57 publications

Use of a Schiff base-modified conducting polymer electrode for electrochemical assay of Cd(II) and Pb(II) ions by square wave voltammetry

Use of a Schiff base-modified conducting polymer electrode for electrochemical assay of Cd(II) and Pb(II) ions by square wave voltammetry

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

Nonlinear Optical Properties of Pyrene Derivatives Based on a Donor–Acceptor Structure and Its Polyurethane Composites

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