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Simple Preparation of Positively Charged Silver Nanoparticles for Detection of Anions by Surface-Enhanced Raman Spectroscopy

03-Mar-2015 | Steven Bell; Alan Stewart; Shauneen Murray, Analyst, 2015

Modification of citrate and hydroxylamine reduced Ag colloids with thiocholine bromide, a thiol functionalized quaternary ammonium salt, creates particles where the zeta potential is switched from the normal values of ca. -50 mV to ca. +50 mV. These colloids are stable but can be aggregated with ...

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Synthesis, Structure, and Magnetic Properties of Novel B-site Ordered Double Perovskites, SrLaMReO6 (M = Mg, Mn, Co and Ni)

02-Mar-2015 | John E Greedan; Corey M. Thompson; Lisheng Chi; Alannah Hallas; Murray Wilson; Timothy Munsie; Ian Swainson; Andrew ..., Dalton Transactions, 2015

Dalton Trans., 2015, Accepted ManuscriptDOI: 10.1039/C4DT03821E, Paper John E Greedan, Corey M. Thompson, Lisheng Chi, Alannah Hallas, Murray Wilson, Timothy Munsie, Ian Swainson, Andrew Paul...

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Discrete {GdIII4M} (M = GdIII or CoII) Pentanuclear Complexes: A new class of metal-organophosphate molecular coolers

25-Feb-2015 | Sandeep Kumar Gupta; Aijaz Dar; Rajeshkumar Thayalan; Subramaniam Kuppuswamy; Stuart Langley; Keith S. Murray; Gopal ..., Dalton Transactions, 2015

The first examples of homo- and hetero-polymetallic organophosphates of gadolinium are reported. Magnetic measurements reveal a higher magnetic entropy change for the isotropic {GdIII5} complex (25.8 J kg-1K-1) as compared to the heterometallic {GdIII4CoII} complex (20.3 J kg-1K-1), which is ...

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A Family of Tri- and Dimetallic Pyridine Dicarboxamide Cryptates: Unusual O,N,O-Coordination and Facile Access to Secondary Coordination Sphere Hydrogen Bonding Interactions

24-Feb-2015 | Gary L. Guillet; Jesse B. Gordon; Gianna N. Di Francesco; Matthew W. Calkins; Erik Čižmár; Khalil A. Abboud; Mark W. ..., Inorganic Chemistry, 2015

A series of tri- and dimetallic metal complexes of pyridine dicarboxamide cryptates are reported in which changes to the base and metal source result in diverse structure types. Addition of strong bases, such as KH or KN(SiMe3)2, followed by divalent metal halides allows direct access to ...

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Isotope Effects in 195Pt NMR Spectroscopy: Unique 35/37Cl- and 16/18O-Resolved “Fingerprints” for All [PtCl6–n(OH)n]2– (n = 1–5) Anions in an Alkaline Solution and the Implications of the Trans Influence

20-Feb-2015 | Leon Engelbrecht; Pieter Murray; Klaus R. Koch, Inorganic Chemistry, 2015

A detailed analysis of the intrinsic 1Δ195Pt(37/35Cl) and 1Δ195Pt(18/16O) isotope 128.8 MHz 195Pt NMR profiles of the series of kinetically inert [PtCl6–n(OH)n]2– (n = 1–5) anions generated in strongly alkaline aqueous solutions shows that each 195Pt NMR resonance of the ...

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Engineering Potent and Selective Analogues of GpTx-1, a Tarantula Venom Peptide Antagonist of the NaV1.7 Sodium Channel

19-Feb-2015 | Justin K. Murray; Joseph Ligutti; Dong Liu; Anruo Zou; Leszek Poppe; Hongyan Li; Kristin L. Andrews; Bryan D. Moyer; ..., Journal of Medicinal Chemistry, 2015

NaV1.7 is a voltage-gated sodium ion channel implicated by human genetic evidence as a therapeutic target for the treatment of pain. Screening fractionated venom from the tarantula Grammostola porteri led to the identification of a 34-residue peptide, termed GpTx-1, with potent activity on NaV1.7 ...

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Organocatalytic Phosphorylation of Alcohols Using Pyridine-N-oxide

10-Feb-2015 | James I. Murray; Rudiger Woscholski; Alan C. Spivey, Synlett, 2015

SynlettDOI: 10.1055/s-0034-1379993 Phosphorylation of alcohols by phosphoryl chlorides catalysed by pyridine-N-oxide is reported. The utility of this method is demonstrated through phosphorylation of primary, secondary and a tertiary alcohol as well as phenols under mild reaction conditions and ...

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[Report] Asynchronous rotation of Earth-mass planets in the habitable zone of lower-mass stars

06-Feb-2015 | Jérémy Leconte; Hanbo Wu; Kristen Menou; Norman Murray, Science , 2015

terrestrial planets could exhibit asynchronous spin-orbit rotation, even with a thin atmosphere. Authors: Jérémy Leconte, Hanbo Wu, Kristen Menou, Norman Murray...

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Cyclic AMP concentrations in dendritic cells induce and regulate Th2 immunity and allergic asthma [Immunology and Inflammation]

03-Feb-2015 | Jihyung Lee; Tae Hoon Kim; Fiona Murray; Xiangli Li; Sara S. Choi; David H. Broide; Maripat Corr; Jongdae Lee; Nicho ..., Proceedings of the National Academy of Sciences current issue, 2015

The inductive role of dendritic cells (DC) in Th2 differentiation has not been fully defined. We addressed this gap in knowledge by focusing on signaling events mediated by the heterotrimeric GTP binding proteins Gαs, and Gαi, which respectively stimulate and inhibit the activation of adenylyl ...

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Scalable, Chromatography-Free Synthesis of Alkyl-Tethered Pyrene-Based Materials. Application to First-Generation “Archipelago Model” Asphaltene Compounds

26-Jan-2015 | Colin Diner; David E. Scott; Rik R. Tykwinski; Murray R. Gray; Jeffrey M. Stryker, The Journal of Organic Chemistry, 2015

In this paper, we report a highly efficient, scalable approach to the total synthesis of conformationally unrestricted, electronically isolated arrays of alkyl-tethered polycyclic aromatic chromophores. This new class of modular molecules consists of polycyclic aromatic “islands” comprising ...

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