Ovadia Lev

Hebrew University of Jerusalem

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Petr V. Prikhodchenko

NS Kurnakova Institute of General and Inorganic Chemistry

156

Alexander G. Medvedev

NS Kurnakova Institute of General and Inorganic Chemistry

122

Jenny Gun

Hebrew University of Jerusalem

104

Alexey A. Mikhaylov

NS Kurnakova Institute of General and Inorganic Chemistry

Andrei V. Churakov

NS Kurnakova Institute of General and Inorganic Chemistry

T. A. Tripol’skaya

NS Kurnakova Institute of General and Inorganic Chemistry

Dmitry A. Grishanov

Hebrew University of Jerusalem

Sergey Sladkevich

Hebrew University of Jerusalem

Alexander D. Modestov

Frumkin Institute of Physical Chemistry and Electrochemistry

Mikhail V. Vener

NS Kurnakova Institute of General and Inorganic Chemistry

Cooperative Institutions

Hebrew University of Jerusalem

169

Nanyang Technological University

Centre National de la Recherche Scientifique

Russian Academy of Sciences

Ben-Gurion University of the Negev

NS Kurnakova Institute of General and Inorganic Chemistry

Technion – Israel Institute of Technology

Lomonosov Moscow State University

Jerusalem College of Technology

National University of Singapore

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Electrooxidation of New Synthetic Cannabinoids: Voltammetric Determination of Drugs in Seized Street Samples and Artificial Saliva

Analytical Chemistry (2016)

Marina Dronova Evgeny Smolianitski Ovadia Lev

The electrochemical sensing of new psychoactive substances, synthetic cannabinoids (SCs), commonly marketed under the trade name "Spice" is explored for the first time. The electrooxidative transformations of 11 new indole and indazole SCs which are currently the predominant illicit smoking mixtures on the drug market is performed using cyclic and differential pulse voltammetry with various commercially available electrodes (Pt, GC, Bdd). It is found that SCs exhibit voltammetric responses that can be used for their detection in smoking mixtures and artificial saliva with limits of detection in the nanomolar range. The indole-based SCs exhibited an anodic peak at ∼1.5 V (vs Ag/Ag+) and ∼1.2 V (vs Ag/AgCl) in acetonitrile and artificial saliva, respectively, and the indazoles exhibited corresponding peaks at ∼1.7 V and ∼1.5 V. The voltammetric procedure was evaluated by prescreening of SCs in 12 confiscated street samples that were also independently analyzed by GC-MS and LC-MS techniques. A good agreement between the three analytical protocols was found. Voltammetry provides a tool for the prescreening of synthetic cannabinoid derivatives in seized materials and biological samples.

Synthetic cannabinoids

Differential pulse voltammetry

Designer drug

Paeoniflorin

Street drugs

10.1021/acs.analchem.6b00368

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Citations (57)

CCDC 1960812: Experimental Crystal Structure Determination

The Cambridge Structural Database (2020)

Andrei V. Churakov Dmitry A. Grishanov Alexander G. Medvedev Alexey A. Mikhaylov Mikhail V. Vener

10.5517/ccdc.csd.cc23td0c

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Citations (0)

Synthesis and crystal structure of triphenyltin and lead complexes with organic peroxides

Mendeleev Communications (2022)

Alexander G. Medvedev Mikhail Yu. Sharipov Dmitry A. Grishanov Artur V. Eshtukov Andrei V. Churakov

Peroxide

Organic peroxide

Proton NMR

10.1016/j.mencom.2022.01.018

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Citations (7)

CCDC 2235673: Experimental Crystal Structure Determination

The Cambridge Structural Database (2023)

Pavel A. Egorov Dmitry A. Grishanov Alexander G. Medvedev Andrei V. Churakov Alexey A. Mikhaylov

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc2f1dhd

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Electro-oxidation of Ruthenium Cyclopentadienyl PTA Complexes in DMF

Journal of The Electrochemical Society (2006)

Vitaly Gutkin Jenny Gun Petr V. Prikhodchenko Ovadia Lev Luca Gonsalvi

Halogen complexes of ruthenium cyclopentadienyl ; ; , and (; ; ; , ) were investigated by electrospray mass spectrometry (ESI-MS), in flow-cell cyclic voltammetry, by microelectrodes, and by combined online electrochemistry and electrospray mass spectrometry (EC/ESI-MS) in dimethyl formamide solution. Coordination changes and the structures of the initial compounds and the products of the electro-oxidation of the Ru(II) complexes were traced by in situ experiments which revealed their fragmentation pathways. ESI-MS collision-induced dissociation fragmentations of the initial reactants and the oxidation products were explained by soft acid-hard base considerations taking into account the different nature of Ru(II)—Ru(IV) centers. The electrochemical studies show that it is possible to tune the formal potentials for the oxidation of complexes by over by proper selection of the ligands. The increase of the redox potential by the different ligands follows the order . We demonstrate a similarity between the propensity of the ligand to fragment out in the gas phase and its relationship to the formal potential of the complex.

Cyclopentadienyl complex

Fragmentation

10.1149/1.2374938

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Citations (12)

Hydrogen peroxide sol–gel coating of microencapsulated phase change materials by metal oxides

Journal of Sol-Gel Science and Technology (2020)

Alexey A. Mikhaylov Alexander G. Medvedev Dmitry A. Grishanov Sergey Sladkevich Zhichuan J. Xu

Sodium sulfite

10.1007/s10971-020-05327-7

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Citations (10)

CCDC 643997: Experimental Crystal Structure Determination

The Cambridge Structural Database (2008)

Chiara Dinoi P. Sozen G. Taban D. Demir Funda Demirhan

10.5517/ccpm43j

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Citations (0)

Morphology and electrochemical properties of a composite produced by a peroxide method on the basis of tin dioxide and carbon black

Russian Journal of Inorganic Chemistry (2016)

Alexey A. Mikhaylov Alexander G. Medvedev T. A. Tripol’skaya E. A. Mel’nik Petr V. Prikhodchenko

Tin dioxide

Carbon fibers

Tin oxide

10.1134/s0036023616120147

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Citations (2)

CCDC 1828851: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Andrei V. Churakov Dmitry A. Grishanov Alexander G. Medvedev Alexey A. Mikhaylov T. A. Tripol’skaya

10.5517/ccdc.csd.cc1zd26n

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Citations (0)

Optimum Truss Geometry for Two Loading Conditions

Journal of the Structural Division (1978)

Ovadia Lev

Variable node coordinates are considered for the case of minimum weight design under two alternative loading systems of simple ideal trusses. Optimality Kuhn-Tucker conditions are derived and used as the basis of two optimization methods. The first extends existing work on iterative design. The second uses a decomposition procedure combined with a gradient method.

Minimum weight

Optimal design

Basis (linear algebra)

10.1061/jsdeag.0004965

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Citations (3)