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
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
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
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
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
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 RhÂ(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