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Holger Ott Christoph Matthes Dr. Arne Ringe Dr. Jörg Magull Prof. Dr. Dietmar Stalke Prof. Dr. Uwe Klingebiel Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(18):4602-4609
Borenes and boranes : Silylaminoiminoborenes, such as depicted, were isolated after treatment of halogen triels with silylaminofluoroboranes. In addition, novel aryl‐ and silyl‐substituted diaminofluoroboranes were also prepared in order to substantiate this reaction route.
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Haifeng Yu Dr. Zhengkun Yu Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(16):2929-2933
Let's make 'meri' : Metal‐free direct alkenylation of indoles was realized by acid‐mediated substitution reactions of α‐oxo ketene dithioacetals with indoles in trifluoroacetic acid/dichloromethane, selectively affording β‐indolyl mono‐ and disubstituted α,β‐unsaturated carbonyl compounds (see scheme). Condensation of the indolyl/ketene monothioacetals and guanidine nitrate efficiently produced meridianin derivatives.
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Xiaoman Liu Louis A. Silks Prof. Dr. Cuiping Liu Dr. Morgane Ollivault‐Shiflett Xin Huang Jing Li Dr. Guimin Luo Prof. Dr. Ya‐Ming Hou Prof. Dr. Junqiu Liu Prof. Dr. Jiacong Shen Prof. 《Angewandte Chemie (International ed. in English)》2009,48(11):2020-2023
A rival to native peroxidase! An existing binding site for glutathione was combined with the catalytic residue tellurocysteine by using an auxotrophic expression system to create an engineered enzyme that functions as a glutathione peroxidase from the scaffold of a glutathione transferase (see picture). The catalytic activity of the telluroenzyme in the reduction of hydroperoxides by glutathione is comparable to that of native glutathione peroxidase.
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Bingjun Xu Xiaoying Liu Jan Haubrich Dr. Robert J. Madix Prof. Cynthia M. Friend Prof. 《Angewandte Chemie (International ed. in English)》2009,48(23):4206-4209
The Midas touch : The low‐temperature transformation of methanol to methyl formate, formaldehyde, and formic acid is promoted by atomic oxygen adsorbed on metallic gold (see picture). The reactions occur with O‐containing Au nanoparticles formed on Au(111) upon oxidation with ozone at 200 K; the facile esterification to methyl formate occurs well below room temperature.
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Lars Orzechowski Georg Jansen Prof. Dr. Sjoerd Harder Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(21):3825-3829
Size does matter : Whereas geminal bimetallic bis(amidophosphorano)methandiide complexes of the heavy alkali metals K and Rb are relatively stable, that of Cs, the largest and most electropositive of the alkali metals, decomposes to form a cyclic product, which cocrystallizes with benzylcesium.
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Jian Yang Prof. JunJun Peng Qingbo Zhang Dr. Feng Peng Prof. Hongjuan Wang Dr. Hao Yu Dr. 《Angewandte Chemie (International ed. in English)》2009,48(22):3991-3995
Turing lead into gold : Hollow hybrid PbSx–Au nanostructures of about 10 nm in diameter were synthesized using a one‐step reaction under mild experimental conditions. The redox reaction of gold precursors with PbS nanocrystals in the presence of dodecylamine leads to the hollow feature of hybrid nanostructures (see picture).
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Ghenadie Novitchi Dr. Wolfgang Wernsdorfer Prof. Dr. Liviu F. Chibotaru Prof. Dr. Jean‐Pierre Costes Dr. Christopher E. Anson Dr. Annie K. Powell Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(9):1614-1619
Propelling magnetism : Supramolecular organization leads to a remarkable dodecanuclear {Cu3Dy3}2 cluster with a “double–propeller” shape (see picture). The linkages of the CuDy units, both intramolecular and supramolecular, appear to be responsible for a drastic change in the single molecule magnetic behavior.
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Alessandro Abbotto Prof. Dr. Luca Beverina Dr. Norberto Manfredi Dr. Giorgio A. Pagani Prof. Dr. Graziano Archetti Dr. Hans‐Georg Kuball Prof. Dr. Christian Wittenburg Dr. Jürgen Heck Prof. Dr. Jan Holtmann 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(25):6175-6185
Donor1+donor2→acceptor : The second‐order NLO molecular properties of a class of dipolar chromophores that incorporate the following design elements are investigated: 1) a substituted hydrazono moiety as a strong donor; 2) a pyrrole ring as an auxiliary donor; 3) strong acceptor groups (see figure). Their first hyperpolarisabilities show good promise for use in electro‐optical devices.
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