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78.174 Aktuelle Fachpublikationen zum Thema chemistry

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A Simple Anti-solvent Method for the Controlled Deposition of Metal and Alloy Nanoparticles

20.06.2018 | Raveendran Poovathinthodiyil; Anju Ajayan; Vineeth Madhavan; Sumitha Chandran, New Journal of Chemistry, 2018

Plasmonics of metal and alloy nanoparticles find immense applications in materials science, medicine and advanced physics. Controlled deposition of these nanoparticles onto simple substrates to yield high Plasmon intensity for different applications such as single molecule sensing is still a ...

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In situ XPS study of the surface chemistry of MAPI solar cells under operating conditions in vacuum

20.06.2018 | C. Das; M. Wussler; T. Hellmann; T. Mayer; W. Jaegermann, Physical Chemistry Chemical Physics, 2018

The most limiting factor for the commercialization of perovskite solar cells is the lack of long-term stability under operating conditions. To examine the intrinsic stability of the perovskite film, we investigated the chemical and electronic properties of methylammonium lead triiodide ...

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New completely renewable biofuels: Formulations and engine tests on an unmodified up-to-date diesel engine

20.06.2018 | Damian Brock; Alexander Koder; Hans-Peter Rabl; Didier Touraud; Werner Kunz, Green Chemistry, 2018

New completely green biofuels with rapeseed oil as main component were formulated. They not only fulfil the principles of green chemistry and thus do not contain any environmentally harmful additives, but also match the currently valid standards for biodiesel regarding their physicochemical ...

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Phyllostictine A: total synthesis, structural verification and determination of substructure responsible for plant growth inhibition

20.06.2018 | Martin Riemer; Veselina V. Uzunova; Nastja Riemer; Guy J. Clarkson; Nicole Pereira; Richard Napier; Michael Shipman, Chemical Communication, 2018

The first total synthesis of phyllostictine A (PA) is reported, which confirms the structure of this fungal metabolite and its (6S,7R,8S)-stereochemistry. Both synthetic PA and an analogue containing the 5-methylene-1,5-dihydro-2H-pyrrol-2-one nucleus exhibit μM inhibitory activity in root growth ...

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Questions in natural products synthesis research that can (and cannot) be answered using computational chemistry

20.06.2018 | Dean J. Tantillo, Chemical Society Reviews, 2018

Questions of relevance to those working in the field of natural products synthesis that can be answered, at least in part, using computational chemistry approaches are described. Illustrative examples are provided, as are descriptions of limitations.

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Cyclic Allylic Carbonates as a Renewable platform for Protecting Chemistry in Water

20.06.2018 | Peter Olsén; Jennifer Morvan; Supaporn Sawadjoon; Andrey Shatskiy; Eric Johnston; Björn Åkermark, Green Chemistry, 2018

The present work explores different cyclic allylic carbonates as a potential class of allylcarbamate precursors. The 5-membered carbonate formed a carbamate with very good thermal and pH stability which could be cleanly deprotected in aqueous solution, in just 30 min with 2 mol % Pd(OAc)2 as ...

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Photochemistry of 9-acridinecarboxaldehyde in aqueous media

20.06.2018 | Wolf-Ulrich Palm, Photochemical & Photobiological Sciences, 2018

Dark and photolysis reactions in solution were investigated for 9-acridinecarboxaldehyde (ACL). ACL reacts in the dark at T = 20 oC and pH = 7.0 in an air saturated solution to the main product 9-acridinecarboxylic acid (ACA) and to the minor product 9-acridinemethanol (ACM) with a lifetime of τ ...

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Stabilization of intermolecular i-motif by lipid modification of Cytosine-oligodeoxynucleotides

20.06.2018 | Yawei Sun; yanyun Ji; Dong Wang; Jiqian Wang; Dongsheng Liu, Organic & Biomolecular Chemistry, 2018

This paper described the stabilization of intermolecular i-motif by lipophilic modification on the 3' terminus of oligonucleotide. The hydrophobic aliphatic chain connected at 3' terminus of trinucleotide (dC)3 promoted the formation of i-motif and significantly enhanced the quadruplex's ...

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A DFT/PCM-based methodology for predicting solvolytic reactivities of organic carbonates

20.06.2018 | Mirela Matić; Bernard Denegri, Organic & Biomolecular Chemistry, 2018

The possibility of employing quantum mechanical computations to predict solvolysis rates of benzhydryl aryl/alkyl (Ar/R) carbonates and to determine nucleofugalities of various Ar/R carbonate leaving groups in terms of Nf values is examined. Since unassisted SN1 transition states of neutral ...

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Interplay of Proton and Electron Transfer to Determine Concerted Behavior in the Proton-Coupled Electron Transfer of Glutathione Oxidation

20.06.2018 | Kejie Meng; Jonnathan Medina-Ramos; Emnet Yibeltal-Ashenafi; Julio C Alvarez, Physical Chemistry Chemical Physics, 2018

Glutathione (GSH), whose thiol group dictates its redox chemistry, oxidizes to the thiyl radical (GS•) that rapidly dimerizes to GSSG. Previously, we found that the oxidation rate of GSH by IrCl62- depends on the base (B) concentration and the pKa of its conjugate acid BH+, so that collateral to ...

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