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18.447 Aktuelle Fachpublikationen in Angewandte Chemie International Edition

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Large Mechanical Response of Single Dendronized Polymers Induced by Ionic Strength

30.04.2010 | Ionel Popa, Baozhong Zhang, Plinio Maroni, A. Dieter Schlüter, Michal Borkovec, Angewandte Chemie International Edition, 2010

The mechanical properties of single cationic dendronized polymers can be strongly modified in aqueous solutions by the ionic strength. Given the possibility to tune the elasticity of dendronized polymers significantly through the solvent properties, such polymers may become ideal building blocks ...

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A Highly Active Heterogeneous Palladium Catalyst for the Suzuki-Miyaura and Ullmann Coupling Reactions of Aryl Chlorides in Aqueous Media

29.04.2010 | Bizhen Yuan, Yingyi Pan, Yingwei Li, Biaolin Yin, Huanfeng Jiang, Angewandte Chemie International Edition, 2010

A heterogeneous palladium catalyst, which is supported on a metal-organic framework, MIL-101, is highly efficient in water-mediated coupling reactions of chloroarenes. High yields are obtained in Suzuki-Miyaura cross-coupling and Ullmann homocoupling reactions of substituted aryl chlorides. ...

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Self-Controlled Monofunctionalization of Quantum Dots for Multiplexed Protein Tracking in Live Cells

29.04.2010 | Changjiang You, Stephan Wilmes, Oliver Beutel, Sara Löchte, Yulia Podoplelowa, Friedrich Roder, Christian Richter, T ..., Angewandte Chemie International Edition, 2010

Functionalization of quantum dots (QDs) was achieved by controlling the surface density of functional groups by electrostatic repulsion. These QDs were conjugated with His-tagged proteins in vitro and in live cells by self-assembly without requiring further fractionation, and dual-color tracking ...

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Reversible Thermally and Photoinduced Electron Transfer in a Cyano-Bridged {Fe2Co2} Square Complex

21.04.2010 | Yuanzhu Zhang, Dongfeng Li, Rodolphe Clérac, Marguerite Kalisz, Corine Mathonière, Stephen M. Holmes, Angewandte Chemie International Edition, 2010

Flip to be square: Structural, spectroscopic, magnetic, and photomagnetic studies conclusively demonstrate that a tetranuclear cyanometalate {Fe2Co2} complex undergoes reversible thermally and light-induced changes in its optical and magnetic properties. This bistability is induced by an ...

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Au@MnO Nanoflowers: Hybrid Nanocomposites for Selective Dual Functionalization and Imaging

20.04.2010 | Thomas D. Schladt, Mohammed Ibrahim Shukoor, Kerstin Schneider, Muhammad Nawaz Tahir, Filipe Natalio, Irene Ament, J ..., Angewandte Chemie International Edition, 2010

Flower power: A convenient strategy for preparing core-tunable multicomponent Au@MnO nanocrystals has been developed. The magnetic nanoflowers are not only efficient as cargo-specific carriers but also have excellent fluorescent properties resulting from fluorophors bound to the Au and MnO ...

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Elucidation of the Structure and Intermolecular Interactions of a Reversible Cyclic-Peptide Inhibitor of the Proteasome by NMR Spectroscopy and Molecular Modeling

20.04.2010 | Benjamin Stauch, Bernd Simon, Teodora Basile, Gisbert Schneider, Nisar P. Malek, Markus Kalesse, Teresa Carlomagno, Angewandte Chemie International Edition, 2010

Complex considerations: The proteasome plays a key role in diseases and is thus an appealing drug target. A structural model (see picture) of the proteasome as a complex with argyrin, a cyclic heptapeptide with antitumoral activity, provides a rationale for the high biological activity of this ...

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Integrating the Schrock and Grubbs Catalysts: Ruthenium-Binaphtholate Catalysts for Olefin Metathesis

16.04.2010 | Johanna M. Blacquiere, Robert McDonald, Deryn E. Fogg, Angewandte Chemie International Edition, 2010

The best of both worlds: Direct incorporation of the atropisomeric binaphtholate ligand into the Grubbs class ruthenium metathesis catalysts is described. Chiral Ru-bino complexes are accessible in good to excellent yields by reaction of K2(bino) with [RuCl2(NHC)(py)2([double bond]CHPh)] in ...

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Structure-Activity Relationships through Sequencing (StARTS) Defines Optimal and Suboptimal RNA Motif Targets for Small Molecules

15.04.2010 | Sai Pradeep Velagapudi, Steven J. Seedhouse, Matthew D. Disney, Angewandte Chemie International Edition, 2010

Hitting the target: A combined computational and experimental approach defines optimal and suboptimal RNA motifs as targets for small molecules through two-dimensional combinatorial screening. The method, termed structure-activity relationships through sequencing (StARTS), uses information from ...

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Nanoparticles for Drug Delivery Prepared from Amphiphilic PLGA Zwitterionic Block Copolymers with Sharp Contrast in Polarity between Two Blocks

15.04.2010 | Zhiqiang Cao, Qiuming Yu, Hong Xue, Gang Cheng, Shaoyi Jiang, Angewandte Chemie International Edition, 2010

In sharp contrast: Poly(carboxybetaine) (PCB)-poly(lactic-co-glycolic acid) (PLGA) block copolymers were obtained by inclusion of tBu groups onto the PCB monomers. The resulting self-assembled PLGA core/PCB shell nanoparticles have extraordinary stability and a high potential for ...

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Remote-Control Photorelease of Caged Compounds Using Near-Infrared Light and Upconverting Nanoparticles

14.04.2010 | Carl-Johan Carling, Farahnaz Nourmohammodian, John-Christopher Boyer, Neil R. Branda, Angewandte Chemie International Edition, 2010

Cage fighter: Lanthanide-doped upconverting nanoparticles convert near-infrared light into ultraviolet light, which drives the photoinduced release of a "caged" species on the nanoparticle surface. This approach overcomes the problem that low-energy light is necessary for penetrating deeper into ...

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