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Biocompatible Infinite‐Coordination‐Polymer Nanoparticle–Nucleic‐Acid Conjugates for Antisense Gene Regulation

13-11-2014 | Colin M. Calabrese, Timothy J. Merkel, William E. Briley, Pratik S. Randeria, Suguna P. Narayan, Jessica L. Rouge, D ..., Angewandte Chemie International Edition, 2014

Abstract Herein, we report the synthesis of DNA‐functionalized infinite‐coordination‐polymer (ICP) nanoparticles as biocompatible gene‐regulation agents. ICP nanoparticles were synthesized from ferric nitrate and a ditopic 3‐hydroxy‐4‐pyridinone (HOPO) ligand bearing a pendant azide. Addition ...

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Bending Nanofibers into Nanospirals: Coordination Chemistry as a Tool for Shaping Hydrophobic Assemblies

13-11-2014 | Elizaveta Kossoy, Haim Weissman, Boris Rybtchinski, Chemistry - A European Journal, 2014

Abstract In the current work, we demonstrate how coordination chemistry can be employed to direct self‐assembly based on strong hydrophobic interactions. To investigate the influence of coordination sphere geometry on aqueous self‐assembly, we synthesized complexes of the amphiphilic perylene ...

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EXAFS Study of the Speciation of Protactinium(V) in Aqueous Hydrofluoric Acid Solutions

12-11-2014 | Stéphanie M. De Sio; Richard E. Wilson, Inorganic Chemistry, 2014

The speciation of protactinium(V) in hydrofluoric acid (HF) solutions was studied using X-ray absorption spectroscopy. Extended X-ray absorption fine structure measurements were performed on an aqueous solution of 0.05 M protactinium(V) with various HF concentrations ranging from 0.5 to 27 M in ...

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Functionalization of hybrid poly(n‐isopropylacrylamide) hydrogels for Escherichia coli cell capture via adsorbed intermediate dye molecule

11-11-2014 | By Jarod Gregory, Jonathon Cannell, Matthew Kofron, Lilit Yeghiazarian, Vasile Nistor, Journal of Applied Polymer Science, 2014

ABSTRACT Poly(n‐isopropylacrylamide) Laponite (PNIPAM‐Lap) hybrid hydrogels, which use the synthetic clay Laponite as a crosslinker, permanently adsorb cationic laser dyes out of solution. This proof‐of‐concept expounds on this capability by adsorbing an intermediate dye molecule and using it ...

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Mechanistic Contrasts between Manganese and Rhenium Bipyridine Electrocatalysts for the Reduction of Carbon Dioxide

06-11-2014 | Christoph Riplinger; Matthew D. Sampson; Andrew M. Ritzmann; Clifford P. Kubiak; Emily A. Carter, Journal of the American Chemical Society, 2014

[Re(bpy)(CO)3]− is a well-established homogeneous electrocatalyst for the reduction of CO2 to CO. Recently, substitution of the more abundant transition metal Mn for Re yielded a similarly active electrocatalyst, [Mn(bpy)(CO)3]−. Compared to the Re catalyst, this Mn catalyst operates at a lower ...

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Dissociation of Diglycolamide Complexes of Ln3+ (Ln = La–Lu) and An3+ (An = Pu, Am, Cm): Redox Chemistry of 4f and 5f Elements in the Gas Phase Parallels Solution Behavior

05-11-2014 | Yu Gong; Guoxin Tian; Linfeng Rao; John K. Gibson, Inorganic Chemistry, 2014

Tripositive lanthanide and actinide ions, Ln3+ (Ln = La–Lu) and An3+ (An = Pu, Am, Cm), were transferred from solution to gas by electrospray ionization as Ln(L)33+ and An(L)33+ complexes, where L = tetramethyl-3-oxa-glutaramide (TMOGA). The fragmentation chemistry of the complexes was examined ...

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Stereoselectivity Switch between Zinc and Magnesium Initiators in the Polymerization of rac-Lactide: Different Coordination Chemistry, Different Stereocontrol Mechanisms

03-11-2014 | Haobing Wang; Yang Yang; Haiyan Ma, Macromolecules, 2014

The preparation and characterization of several zinc and magnesium complexes bearing chiral aminophenolate ligands, [(S)- or (R)-L]ZnN(SiMe3)2 (1, 2), [(S)- or (R)-L]ZnOtBu (3, 4) and [(S)- or (R)-L]MgN(SiMe3)2 (5, 6) ((S)- or (R)-L = (S)- or ...

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H2 Generation and Sulfide to Sulfoxide Oxidation with H2O and Sunlight with a Model Photoelectrosynthesis Cell

02-11-2014 | Author(s): Pau Farràs , Carlo Di Giovanni , John Noel Clifford , Emilio Palomares , Antoni Llobet, Coordination Chemistry Reviews, 2014

Publication date: Available online 28 October 2014 Source:Coordination Chemistry Reviews Author(s): Pau Farràs , Carlo Di Giovanni , John Noel Clifford , Emilio Palomares , Antoni Llobet A summary of the recent advances in homogeneous light-driven catalytic oxidation reactions is ...

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Chemistry in Motion: Tiny Synthetic Motors

30-10-2014 | Peter H. Colberg; Shang Yik Reigh; Bryan Robertson; Raymond Kapral, Accounts of Chemical Research, 2014

ConspectusDiffusion is the principal transport mechanism that controls the motion of solute molecules and other species in solution; however, the random walk process that underlies diffusion is slow and often nonspecific. Although diffusion is an essential mechanism for transport in the ...

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A Combined Experimental and Theoretical Study on the Isomers of 2,3,4,5‐Tetracarba‐nido‐Hexaborane(6) Derivatives and Their Photophysical Properties

28-10-2014 | Holger Braunschweig, Sundargopal Ghosh, J. Oscar C. Jimenez‐Halla, Johannes H. Klein, Christoph Lambert, Krzysztof R ..., Chemistry - A European Journal, 2014

Abstract Building upon our ongoing studies on the high‐yield synthetic route to 2,3,4,5‐tetracarba‐1,6‐nido hexaborane derivative 5, we continue to explore the chemistry of this system to isolate a range of perphenylated C4B2‐type carborane isomers. As a result, the photolysis of 5 for an ...

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