Thermal electron-transfer-induced oxidation of 2-pyrazolines

Memarian, Hamid Reza; Minakar, Reza

doi:10.1007/s11030-019-09922-x

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…17 poor properties of pristine CFs restrict their application as marine electrodes. 18 In general, thermal oxidation 19 is a typical method to increase the surface area and oxygen-containing functional groups of CFs. 20 Although thermally oxidized CFs can improve their performance, it is far from meeting the requirements of marine electrodes.…”

Section: Introductionmentioning

confidence: 99%

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Sun

et al. 2023

ACS Appl. Nano Mater.

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The increasing demand for maintenance-free, costeffective, and high-stability flexible electrodes is highly anticipated for the research of marine electric-field sensors, and various carbon fibers (CFs) are considered the most suitable carbon-based electrode for the purpose. Nevertheless, the conventional fabrication of acidified or nitrogenized CF electrodes did not attract great attention for commercial application, which has limitations in the case of simultaneous cost-effectiveness and longterm stability. In this study, with homemade reduced graphene oxide (rGO) load, the prepared double carbon substrate Ag-rGO-CF composite electrodes have a honeycomb rGO conductive skeleton and the dispersed Ag nanoparticles via a facile hermetic oxidation process and hydrothermal method. The prepared Ag-rGO-CF composite electrode demonstrated an outstanding electrode performance, including low resistance, high electrochemical reaction rate, and stable potential with long-term stability and low cost. The electric double-layer (EDL) structure theory from the Gouy−Chapman−Stern model and double carbon substrate mechanism between CFs and rGO with the help of Ag were clarified, whose principle is to strengthen the adsorption force and electrostatic attraction of the electrode and to offset the residual charge while reducing the thickness of the electric double layer to achieve the purpose of potential balance. The Ag-rGO-CF composite electrode has presented long-term stability and high sensitivity, especially a wide application bandwidth. The Ag-rGO-CF composite electrode made in this study is a competitive candidate material as a flexible marine electrode field sensor.

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Section: Introductionmentioning

confidence: 99%

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…In continuation to our previous studies concerning the elucidation of the steric and electronic effects of substitution of various heterocyclic rings on the thermal [10,11] and photochemical oxidation [12,13], the spectral characteristic [14,15], and cyclic voltammetric and computational studies [16,17], we were interested to investigate these effects on the fluorescence ability of various substituted 2-pyrazolines. In addition to the photo-physical works, the results of the computational study may explain the effect of the electronic and steric effects of the ring substitutions on the energies of the molecular orbitals describing the fluorescence ability of these compounds.…”

Section: Introductionmentioning

confidence: 99%

Electronic and steric substituent effects on the fluorescence emission of 2‐pyrazoline derivatives

Memarian,

Rejali,

Soltani

2023

Luminescence

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A series of substituted 2‐pyrazolines were synthesized, and the steric and electronic effects of substituents on the C3‐ and C5‐positions of the heterocyclic ring on their fluorescent ability were investigated. Two different conjugative intramolecular charge transfer (ICT) and intramolecular charge transfer through space (spiro‐conjugation) affect the fluorescence intensity of these compounds. The extent of the ICT process and spiro‐conjugation depends on the electronic nature of the additional substitution and its position on the attached aryl rings. In addition, the effects of the concentration and the solvent polarity on the fluorescence emission were studied. Density functional theory (DFT) calculations were carried out to gain insight into the geometric, electronic, and spectroscopic properties of the pyrazoline derivatives. The results of both experimental and computational studies explain the effects of the geometrical orientation of the C3‐ and C5‐aryl rings toward the heterocyclic ring and also the electronic nature of their additional substitutions on the fluorescence intensity.

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Photooxidation of 2,3-dihydroquinazolin-4(1H)-ones: retention or elimination of 2-substitution

Memarian

Aghalar

2021

Mol Divers

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Thermal electron-transfer-induced oxidation of 2-pyrazolines

Cited by 6 publications

References 45 publications

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Electronic and steric substituent effects on the fluorescence emission of 2‐pyrazoline derivatives

Photooxidation of 2,3-dihydroquinazolin-4(1H)-ones: retention or elimination of 2-substitution

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