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Abrupt two-step and symmetry breaking spin crossover in an iron(III) complex: an exceptionally wide [LS-HS] plateau

26-11-2014 | David James Harding; Wasinee Phonsri; Phimphaka Harding; Keith S. Murray; Boujemaa Moubaraki; Guy N L Jameson, Dalton Transactions, 2014

[Fe(qsal-Br)2]NO3·2MeOH is reported which undergoes abrupt two step symmetry breaking spin crossover, T½(1st step) = 136 K and T½(2nd step) = 232 K with a hysteresis of 16 K and 5 K, respectively and an unprecedented [HS-LS] plateau of 96 K.

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Neutral Diiron(III) Complexes with Fe2(-E)2 (E = O, S, Se) Core Structures: Reactivity of an Iron(I) Dimer Towards Chalcogens

25-11-2014 | Cameron Jones; Lea Fohlmeister; Kuduva Vignesh; Florian Winter; Boujemaa Moubaraki; Gopalan Rajaraman; Rainer Poettg ..., Dalton Transactions, 2014

Three neutral bis(µ-chalcogenido)diiron(III) complexes, [{(N,N’-Pipiso)Fe(-E)}2] (Pipiso- = [(DipN)2C(cis-2,6-Me2NC5H8)]-, (Dip = C6H3Pri2-2,6; E = O, S or Se) have been prepared by reactions of the iron(I) dimer [{(µ-N,N’-Pipiso)Fe}2] with O2, S8 or Se¬¬∞. Treating the -selenido compound ...

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Competitive formation of DNA linkage isomers by a trinuclear platinum complex and the influence of pre-association

25-11-2014 | Joseph J. Moniodis; Donald S. Thomas; Murray S. Davies; Susan J. Berners-Price; Nicholas P. Farrell, Dalton Transactions, 2014

2D [1H, 15N] HSQC NMR spectroscopy has been used to monitor the reaction of fully 15N-labelled [{trans-PtCl(NH3)2}2(μ-trans-Pt(NH3)2{NH2(CH2)6NH2}2)]4+ (BBR3464 (15N-1)) with the 14-mer duplex (5′-{d(ATACATG(7)G(8)TACATA)}-3′·5′-{d(TATG(18)TACCATG(25)TAT)}-3′ or I) at pH 5.4 and 298 K, to examine ...

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A Carboxy Terminal BMP/TGF‐β Binding Site in Secreted Phosphoprotein 24 kD Independently Affects BMP‐2 Activity

22-11-2014 | Haijun Tian, Chen‐Shuang Li, Ke‐Wei Zhao, Jeffrey C. Wang, M. Eugenia L. Duarte, Cynthia L. David, Kevin Phan, Elisa ..., Journal of Cellular Biochemistry, 2014

Abstract Secreted phosphoprotein 24 kD (spp24) is a bone matrix protein isolated during attempts to identify osteogenic proteins. It is not osteogenic but performs other important roles in the regulation of bone metabolism, at least in part, by binding to and affecting the activity of members ...

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Size- and Composition-Dependent Radio Frequency Magnetic Permeability of Iron Oxide Nanocrystals

19-11-2014 | Hongseok Yun; Xiyu Liu; Taejong Paik; Duraivelan Palanisamy; Jungkwun Kim; William D. Vogel; Arthur J. Viescas; Jun ..., ACS Nano, 2014

We investigate the size- and composition-dependent ac magnetic permeability of superparamagnetic iron oxide nanocrystals for radio frequency (RF) applications. The nanocrystals are obtained through high-temperature decomposition synthesis, and their stoichiometry is determined by Mössbauer ...

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Synthesis, Structure, and Magnetism of a Family of Heterometallic {Cu2Ln7} and {Cu4Ln12} (Ln = Gd, Tb, and Dy) Complexes: The Gd Analogues Exhibiting a Large Magnetocaloric Effect

19-11-2014 | Stuart K. Langley; Boujemaa Moubaraki; Corrado Tomasi; Marco Evangelisti; Euan K. Brechin; Keith S. Murray, Inorganic Chemistry, 2014

The syntheses, structures, and magnetic properties of two heterometallic CuII–LnIII (LnIII = Gd, Tb, and Dy) families, utilizing triethanolamine and carboxylate ligands, are reported. The first structural motif displays a nonanuclear {CuII2LnIII7} metallic core, while the second reveals a ...

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Stacking disorder in ice I

11-11-2014 | Tamsin L. Malkin; Benjamin J. Murray; Christoph G. Salzmann; Valeria Molinero; Steven J. Pickering; Thomas F. Whale, Physical Chemistry Chemical Physics, 2014

Traditionally, ice I was considered to exist in two well-defined crystalline forms at ambient pressure: stable hexagonal ice (ice Ih) and metastable cubic ice (ice Ic). However, it is becoming increasingly evident that what has been called cubic ice in the past does not have a structure ...

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Conservation Weighting Functions Enable Covariance Analyses to Detect Functionally Important Amino Acids

07-11-2014 | Lucy J. Colwell et al., PLoS ONE, 2014

by Lucy J. Colwell, Michael P. Brenner, Andrew W. Murray The explosive growth in the number of protein sequences gives rise to the possibility of using the natural variation in sequences...

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Highly Specific Plasmonic Biosensors for Ultrasensitive MicroRNA Detection in Plasma from Pancreatic Cancer Patients

07-11-2014 | Gayatri K. Joshi; Samantha Deitz-McElyea; Merrell Johnson; Sonali Mali; Murray Korc; Rajesh Sardar, Nano Letters, 2014

MicroRNAs (miRs) are small noncoding RNAs that regulate mRNA stability and/or translation. Because of their release into the circulation and their remarkable stability, miR levels in plasma and other biological fluids can serve as diagnostic and prognostic disease biomarkers. However, quantifying ...

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Competitive formation of DNA linkage isomers by a trinuclear platinum complex and the influence of pre-association

04-11-2014 | Susan Berners-Price; Joseph J Moniodis; Donald S Thomas; Murray S Davies; Nicholas Patrick Farrell, Dalton Transactions, 2014

2D [1H, 15N] HSQC NMR spectroscopy has been used to monitor the reaction of fully 15N-labelled [{trans-PtCl(NH3)2}2(μ-trans-Pt(NH3)2{NH2(CH2)6NH2}2)]4+ (BBR3464 (15N-1)) with the 14-mer duplex (5'-{d(ATACATG(7)G(8)TACATA)}-3' . 5'-{d(TATG(18)TACCATG(25)TAT)}-3' or I) at pH 5.4 and 298 K, to ...

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