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Jianhui Zhu Yongmei Zhao Dr. Yanyan Zhu Ziyi Wu Miaoxin Lin Weijiang He Dr. Yan Wang Dr. Guangju Chen Prof. Dr. Lei Dong Dr. Junfeng Zhang Prof. Dr. Yi Lu Prof. Dr. Zijian Guo Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5245-5253
The center of it all : An antitumor‐active trinuclear platinum complex forms unprecedented interstrand cross‐linked triadducts with 18‐mer DNA duplexes (see figure; complex in yellow with the platinum centers in red) and behaves differently from its dinuclear analogue.
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Zhibo Yang Dr. Erich R. Vorpagel Dr. Julia Laskin Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(9):2081-2090
Charge matters! The charge state significantly influences the conformation and the binding energy between vancomycin antibiotic and bacterial cell‐wall analogue peptides (see figure). Surface‐induced dissociation (SID) studies provide a quantitative comparison between the stabilities of different charge states of the complex.
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Takanori Suzuki Prof. Yasuyo Yoshimoto Takashi Takeda Dr. Hidetoshi Kawai Dr. Kenshu Fujiwara Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(9):2210-2216
Bridging the gap : Snapshots of 1,6‐H‐shift precursors indicate that a narrower C? H???C+ separation (D in the ORTEP diagram) in the title complexes induces faster degenerate rearrangement of 1 +. A contact distance of less than 2.7 Å is necessary to realize the organic three‐center two‐electron bond of [C? H? C]+, as indicated by extrapolation of the X‐ray data.
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Thomas M. Gøgsig Anders T. Lindhardt Dr. Mouloud Dekhane Dr. Julie Grouleff Troels Skrydstrup Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(24):5950-5955
Easy and direct : Regioselective Mizoroki–Heck‐coupling reactions using heteroaromatic tosylates as electrophiles were achieved, thus providing direct and easy access to highly functionalized α‐heteroarylvinyl amides and ethers.
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Guoyong Song Xingwei Li Prof. Dr. Zhongcheng Song Jing Zhao Prof. Dr. Hongjie Zhang Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(22):5535-5544
Phosphine‐assisted C? H activation of the methyl group of 2‐methylimidazolium compounds led to a series of iridium, rhodium, and palladium complexes of 2‐methyleneimidazolines. Experimental results confirmed that the product of methyl C? H activation is the kinetic product, whereas the aryl C? H activation product is the thermodynamic product (see scheme).
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Toshihide Maki Dr. Shinya Iikawa Gen Mogami Hitomi Harasawa Yoshihiro Matsumura Prof. Dr. Osamu Onomura Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5364-5370
Get selective! A selective oxidation of 1,2‐diols to α‐hydroxyketones catalyzed by organotin compounds has been developed (see scheme). Invaluable chemo‐ and stereoselectivity were found in the reaction. The catalytic system has been achieved by electrochemical and chemical oxidation.
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Arjen Cnossen Dirk Pijper Tibor Kudernac Dr. Michael M. Pollard Dr. Nathalie Katsonis Dr. Ben L. Feringa Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2768-2772
Lightning quick! A new ultrafast light‐driven molecular motor was developed, which was readily incorporated into a larger trimeric system. The trimer of these motors was studied with STM and at the interface of highly oriented pyrolytic graphite and 1‐phenyloctane the molecules form stable arrays in which the chirality of the trimer is expressed on both the molecular and the supramolecular level (see figure).
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M. Becker Dr. Th. Stelzner Dr. A. Steinbrück A. Berger Dr. J. Liu Dr. D. Lerose U. Gösele Prof. Dr. S. Christiansen Dr. 《Chemphyschem》2009,10(8):1219-1224
Gold caps on silicon nanowires are selectively coated with silver by autometallography (electroless deposition). Changing the conditions of silver deposition, a variety of different coating morphologies can be produced (see figure). The different silver coating morphologies are investigated in terms of their capabilities for surface enhanced Raman scattering (SERS) experiments.
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Philippe Knauth Prof. Dr. Alan V. Chadwick Prof. Dr. Pierre E. Lippens Dr. Gerhard Auer Dr. 《Chemphyschem》2009,10(8):1238-1246
Nanocrystalline TiO 2 (anatase) is an essential oxide for environment and energy applications. A combination of EXAFS spectroscopy and DFT calculations on a series of dopants with quite similar ion radius, but increasing ion charge, show boundary space charge segregation of acceptor cations. The picture illustrates the Fourier‐transformed EXAFS spectrum for Sn4+‐doped TiO2.
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Patrick J. M. Stals Maarten M. J. Smulders Rafael Martín‐Rapún Dr. Anja R. A. Palmans Dr. E. W. Meijer Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(9):2071-2080
Molecular organization : Chiral benzene tricarboxamides with methyl substituents at defined positions self‐assemble into supramolecular polymers of preferred helicity by three‐fold α‐helical‐type hydrogen bonding. The odd–even effect is operative and all derivatives are liquid crystalline showing a Colho phase (see figure).
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Per Antoni Dr. Yvonne Hed Axel Nordberg Daniel Nyström Dr. Hans von Holst Prof. Anders Hult Prof. Michael Malkoch Prof. 《Angewandte Chemie (International ed. in English)》2009,48(12):2056-2056
By taking advantage of “click” chemistry's chemoselective nature, a new platform of bifunctional AB2C dendrimers, having acetylene/azide groups anchored within the interior and hydroxy groups on the periphery, has been realized. In their Communication on page 2126 ff. M. Malkoch and co‐workers reveal a simple synthetic route for two sets of frameworks. To illustrate the utility of AB2C dendrimers they were used in a one‐pot postfunctionalization protocol, in the development of dendritic nanoparticles, and in the formation of hydrogels.
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Thanh V. Nguyen David J. Sinclair Dr. Anthony C. Willis Dr. Michael S. Sherburn Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(24):5892-5895
Guest‐love‐ometer : The equilibrium inside–outside atropisomeric ratio of ortho‐substituted phenyl cavitands shows a strong solvent dependence. The competition between the ortho‐substituent and the solvent guest for the bowl cavity leads to a sensitive system for the measurement of relative guest binding affinities.
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Norbert Jux Priv.‐Doz. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(24):4284-4286
More π, please! A free‐base, benzannelated triphyrin with a [2.1.1] bridging pattern ( 1 ) and an azulene‐derived tetracationic all‐carbon porphyrinoid ( 2 ) are discussed. Compound 1 can be used to form metal triphyrin complexes, and 2 shows potential in molecular electronics and as a receptor for weakly binding anions.