5 research outputs found

    sj-docx-1-psp-10.1177_01461672231210772 – Supplemental material for Income Is a Stronger Predictor of Subjective Social Class in More Economically Unequal Places

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    Supplemental material, sj-docx-1-psp-10.1177_01461672231210772 for Income Is a Stronger Predictor of Subjective Social Class in More Economically Unequal Places by Youngju Kim and Nicolas Sommet in Personality and Social Psychology Bulletin</p

    Biosynthetic Origin of Alchivemycin A, a New Polyketide from <i>Streptomyces</i> and Absolute Configuration of Alchivemycin B

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    Biosynthetic origin of 2<i>H</i>-tetrahydro-4,6-dioxo-1,2-oxazine, an unprecedented structural unit first discovered in alchivemycin A (<b>1</b>), was investigated by feeding <sup>13</sup>C-labeled precursors. Incorporations of both [1-<sup>13</sup>C]glycine and [1-<sup>13</sup>C]-<i>N</i>-hydroxyglycine into the carbon at the 4-position of this six-membered ring indicate that the hydrooxazine ring is assembled through a PKS-NRPS hybrid pathway. Additionally, alchivemycin B (<b>2</b>), a deoxygenated analog of <b>1</b>, was isolated and its relative and absolute configurations were determined by spectroscopic analysis including NMR and CD and X-ray crystallography

    Effect of Fluorination on the Properties of a Donor–Acceptor Copolymer for Use in Photovoltaic Cells and Transistors

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    Two novel indacenodithiophene (IDT) based donor–acceptor conjugated polymers for use in organic field effect transistors and photovoltaic devices are synthesized and characterized. The effect of inclusion of two fluorine atoms on the acceptor portion of the polymer is thoroughly investigated via a range of techniques. The inductively withdrawing and mesomerically donating properties of the fluorine atoms result in a decrease of the highest occupied molecular orbital (HOMO), with little effect on the lowest unoccupied molecular orbital (LUMO) as demonstrated through density functional theory (DFT) analysis. Inclusion of fluorine atoms also leads to a potentially more planar backbone through inter and intrachain interactions. Use of the novel materials in organic field effect transistor (OFET) and organic photovoltaic (OPV) devices leads to high mobilities around 0.1 cm<sup>2</sup>/(V s) and solar cell efficiencies around 4.5%

    Comparative Optoelectronic Study between Copolymers of Peripherally Alkylated Dithienosilole and Dithienogermole

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    Here we report a simple methodology for the synthesis of dithienosilole and dithienogermole monomers in which the necessary solubilizing long chain alkyl groups are incorporated into the peripheral 3,5-positions of the fused ring. We report four novel monomers in which methyl or butyl groups are attached to the bridging Si and Ge atom. Copolymers with bithiophene were synthesized by a Stille polymerization in high molecular weight. We report the optical, electrical, electrochemical and morphological properties of the resulting polymers. We find that the nature of the bridging heteroatom (Si or Ge) has only a minor influence on these properties, whereas the nature of the alkyl chain attached to the bridging atom is found to have a much larger effect

    Pronounced Inhibition Shift from HIV Reverse Transcriptase to Herpetic DNA Polymerases by Increasing the Flexibility of α‑Carboxy Nucleoside Phosphonates

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    Alpha-carboxynucleoside phosphonates (α-CNPs) are novel viral DNA polymerase inhibitors that do not need metabolic conversion for enzyme inhibition. The prototype contains a cyclopentyl linker between nucleobase and α-carboxyphosphonate and preferentially (50- to 100-fold) inhibits HIV-1 RT compared with herpetic DNA polymerases. A synthesis methodology involving three steps has been developed for the synthesis of a series of novel α-CNPs, including a Rh­(II)-catalyzed O–H insertion that connects the carboxyphosphonate group to a linker moiety and an attachment of a nucleobase to the other end of the linker by a Mitsunobu reaction followed by final deprotection. Replacing the cyclopentyl moiety in the prototype α-CNPs by a more flexible entity results in a selectivity shift of ∼100-fold in favor of the herpetic DNA polymerases when compared to selectivity for HIV-1 RT. The nature of the kinetic interaction of the acyclic α-CNPs against the herpetic DNA polymerases differs from the nature of the nucleobase-specific kinetic interaction of the cyclopentyl α-CNPs against HIV RT
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