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Efficient nonenzymatic hydrogen peroxide sensor in acidic media based on Prussian blue nanoparticles-modified poly(o-phenylenediamine)/glassy carbon electrode

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Chinese Chemical Letters 2016年第3期27卷 481-486页

作者： Reza Ojani Parisa Hamidi Jahan-Bakhsh Raoof Electroanalytical Chemistry Research Laboratory Faculty of ChemistryUniversity of Mazandaran

The Prussian blue nanoparticles（PBNPs） were prepared by a self-assembly process, on a glassy carbon（GC） electrode modified with a poly（o-phenylenediamine）（Po PD） film. The stepwise fabrication process of PBNPs-modified Po PD/GCE was characterized by scanning electron microscopy（SEM） and electrochemical impedance spectroscopy. The prepared PBNPs showed an average size of 70 nm and a homogeneous distribution on the surface of modified electrodes. The PBNPs/Po PD/GCE showed adequate mechanical, electrochemical stability and good sensitivity in comparison with other PB based H2O2 sensors. The present modified electrode exhibited a linear response for H2O2 reduction over the concentration range of 1–58.22 mmol L ^-1with a detection limit of ca. 0.8 mmol L ^-1（S/N = 3）, and sensitivity of 3187.89 m A（mol L ^-1） ^-1cm ^-2using the amperometric method. This sensor was employed for the H2O2 determination in real sample and also exhibited good interference resistance and selectivity.

关键词： Self-assembly Prussian blue nanoparticles Hydrogen peroxide Sensor

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Quenching effect of deferoxamine on free radical-mediated photon production in luminol and ortho-phenanthroline-dependent chemiluminescence

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Chinese Chemical Letters 2014年第4期25卷 630-634页

作者： Mahdi Parvar Jalil Mehrzadn Mohammad Javad Chaichi Saman Hosseinkhani Hamid Golchoubian Faculty of Chemistry Mazandaran University Department of Pathobiology Faculty of Veterinary MedicineFerdowsi University of Mashhad Veterinary Biotechnology Research Group Institute of BiotechnologyFerdowsi University of Mashhad Department of Biochemistry Faculty of Biological SciencesTarbiat Modares University

Removing excessive free radicals （FRs） by a synthetic chemical might give a clue for treatment of many iron-mediated diseases. Deferoxamine （DFO） can be one of the chemicals of choice for the clue. To investigate photoredox properties of DFO, its quenching effect on superoxide radical （O2°）, hydrogen peroxide （H202） and hydroxyl radical （OH~） was examined using luminol and ortho-phenanthroline （o- phen） chemiluminescence （CL） systems and UV-vis spectrophotometry. Stern-Volmer equation was also used for the CL kinetics. The observed quenching effect of DFO on CL]photon production in luminol and o-phen CL systems strongly confirmed the static arm of quenching properties of DFO on OH° and H2O2, but much less pronounced on O2^-°; the quenching property was maximal when iron was involved in the reaction systems. The Stern-Volmer plots in the designed photochemical reaction systems also confirmed a potent quenching effect of DFO on FR-mediated CL. Our study highlights strong photoreducing and antioxidant properties of DFO with huge quenching capacity on excessive FRs, and thus implies its promising prospects for therapeutic applications.

关键词： Chemiluminescence Deferoxamine Free radicals Photon production Stern-Volmer plot

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以有序介孔二氧化硅纳米粒子为可再生催化剂多组分一锅法合成4H-氧萘衍生物(英文)

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催化学报 2012年第9期33卷 1486-1494页

作者： Yaghoub SARRAFI Ebrahim MEHRASBI Amir VAHID Mahmood TAJBAKHSH Department of Organic Chemistry Faculty of ChemistryUniversity of Mazandaran

A simple,efficient and environmentally benign protocol for the synthesis of 4H-chromene derivatives was developed using bio-compatible,neutral,and recoverable mesoporous silica nanoparticles as a *** 4H-chromene derivatives were obtained in excellent yields by three component reaction of an aldehyde or isatin,malononitrile,and cyclic 1,3-diketones in ethanol at 60℃.

关键词： green synthesis multicomponent reactions 4H-chromene derivatives mesoporous silica nanoparticles

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