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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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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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Sebastian Meier Dr. Andrew J. Benie Dr. Jens Ø. Duus Prof. Ole W. Sørensen Prof. 《Chemphyschem》2009,10(6):893-895
NMR artifact purging: Modern NMR experiments depend on efficient coherence transfer pathways for their sensitivity and on suppression of undesired pathways leading to artifacts for their spectral clarity. A novel robust adiabatic element suppresses hard‐to‐get‐at artifacts (see picture).
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Tetyana Beryozkina Dr. Ksenia Boyko Natalya Khanduyeva Volodymyr Senkovskyy Dr. Marta Horecha Ulrich Oertel Dr. Frank Simon Dr. Manfred Stamm Prof. Anton Kiriy Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2695-2698
Graft work : The first surface‐initiated and site‐specific palladium‐catalyzed Suzuki polycondensation that allows selective grafting and patterning of semiconducting and emissive poly[9,9‐bis(2‐ethylhexyl)fluorene] ( 1 ) at room temperature is developed (see scheme). The pattering is demonstrated by AFM (see image).
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Liang Cheng Dr. Mingwang Shao Prof. Xiuhua Wang Haibo Hu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(10):2310-2316
Molecular highways : A facile one‐step, surfactant‐free route was applied to produce high‐purity and uniform α‐MoO3 nanoribbons (see figure), and their photocatalytic, photoconductive, and electrochemical properties were investigated. The results showed that the as‐prepared products had superior photo and electro properties.
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Xiukai Li Dr. Naoki Kikugawa Dr. Jinhua Ye Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(14):3538-3545
Slip between the sheets! The intercalation properties of lamellar solid acids have a profound impact on nitrogen doping as well as on the resultant visible‐light photocatalysis, and the effects depend strongly on the protonic acidities of the samples (see figure).
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Masakazu Nambo Kenichiro Itami Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(19):4735-4735
An unexpected C? H bond dimerization reaction and C? C bond‐cleavage reaction in organo(hydro)fullerenes have been discovered. In their Communication on page 4760 ff. , K. Itami and M. Nambo describe the use of Pd catalysts for a number of interesting reactions of such fullerenes.
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Jie Han Dr. Xiao‐Yong Chang Li‐Rong Zhu Mei‐Li Pang Dr. Ji‐Ben Meng Prof. Stephen Sin‐Yin Chui Dr. Siu‐Wai Lai Dr. V. A. L. Roy Dr. 《化学:亚洲杂志》2009,4(7):1099-1107
Chain change : Variations in the position, number, and chain length of the n‐alkoxy chains readily tune the liquid‐crystalline properties of 2,5‐diaryl‐1,3,4‐thiadiazole derivatives from smectic to hexagonal columnar mesophases at room temperature. The calamitic S‐heterocyclic compounds show electrical conductivity in both solid and liquid‐crystal states.
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Alena Rudolph Mark Lautens Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2656-2670
Secondary, but second to none : The use of secondary alkyl halides in transition‐metal‐catalyzed cross‐coupling reactions (see scheme) has advanced significantly over the last five years. Selected examples of these transformations are examined, including mechanistic and stereochemical aspects.
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Nobutaka Ototake Masashi Nakamura Yasuo Dobashi Prof. Haruhiko Fukaya Osamu Kitagawa Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(20):5090-5095
Going separate ways : By using π‐allyl–palladium chemistry (path A) and PdII‐catalyzed Claisen chemistry (path B), a highly selective stereodivergent synthesis of separable amide rotamers was achieved (see scheme).
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Anthony J. Zucchero Rebecca A. Shiels Psaras L. McGrier M. Alicia To Christopher W. Jones Prof. Uwe H. F. Bunz Prof. 《化学:亚洲杂志》2009,4(2):262-269
Silica scaffolding : By employing functionalized mesoporous SBA‐15 silica, novel fluorescent cruciform‐silica hybrid materials are generated which preserve the desirable solution properties of cruciforms in the solid state for potential use in sensory schemes.
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Lucile Fischer Marion Decossas Dr. Jean‐Paul Briand Dr. Claude Didierjean Dr. Gilles Guichard Dr. 《Angewandte Chemie (International ed. in English)》2009,48(9):1625-1628
The perfect blend : A new class of self‐assembling cyclooligomers with mixed urea/amide backbone is described (see figure). A high level of hierarchical and directional control is achieved: depending on the level of backbone preorganization, columnar or tubular arrangements with either parallel or antiparallel growing modes can be selected.