共查询到20条相似文献,搜索用时 15 毫秒
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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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Guillaume Berthon‐Gelloz Dr. Mélanie Marchant Bernd F. Straub Prof. Dr. Istvan E. Marko Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2923-2931
Pd 0 does the trick! Alkenyl silanes are efficiently cyclopropanated by diazoalkanes at low Pd loadings (see scheme). Clear evidence for the involvement of a Pd0 resting state for this reaction is given.
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Harsha E. Rajapakse D. Rajasekhar Reddy Dr. Shabnam Mohandessi Nathaniel G. Butlin Dr. Lawrence W. Miller Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):4990-4992
Brilliance of terbium : Heterodimeric conjugates of trimethoprim covalently linked to sensitized terbium chelates bind to Escherichia coli dihydrofolate reductase fusion proteins with nanomolar affinity (see picture). Terbium luminescence enables sensitive and time‐resolved detection of labeled proteins in vitro and on the surface of living mammalian cells.
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Takamasa Oguchi Kazuhiro Watanabe Dr. Kôichi Ohkubo Hideki Abe Dr. Tadashi Katoh Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2826-2845
Potential immunosuppressive agents : Candelalides A, B and C (see figure), novel blockers of the voltage‐gated potassium channel Kv1.3, have been efficiently synthesized for the first time in a convergent and unified manner starting from (+)‐5‐methyl‐Wieland–Miescher ketone. The method explored has potential for preparing various types of candelalide analogues for the structure–activity relationship studies.
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Sandro Pagano Giuseppe Montana Claudia Wickleder Prof. Dr. Wolfgang Schnick Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(25):6186-6193
Shine a light with cyanates : A novel approach for the synthesis of urea complexes and homoleptic cyanates of alkaline earth metals and europium is described. The compounds have been fully characterized, including their magnetism and temperature‐dependent luminescence properties (see graphic).
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Ken‐ichi Sawamura Dr. Teruaki Izumi Kiyotoshi Kawasaki Shintaro Daikohara Tetsu Ohsuna Prof. Mitsuko Takada Dr. Yasushi Sekine Prof. Eiichi Kikuchi Prof. Masahiko Matsukata Prof. 《化学:亚洲杂志》2009,4(7):1070-1077
Sort the bigs from the smalls : Reverse‐selective membranes, through which bigger molecules selectively permeate, are attractive for developing chemical processes. A new adsorption‐based reverse‐selective membrane that utilizes a Na cation occluded in a zeolitic framework is presented. The membrane developed enables the selective permeation and separation of bigger polar molecules, such as methanol and water, from hydrogen above 473 K.
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Xiaojun Han Dr. Ammathnadu S. Achalkumar Dr. Richard J. Bushby Prof. Stephen D. Evans Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(26):6299-6299
A cholesterol‐based membrane tether…? system has been developed, for the attachment of lipid bilayer membranes at silica and gold surfaces, by S. D. Evans et al. in their Full Paper on page 6363 ff. Arrays of membrane have been produced by using deep UV lithography on both metallic and insulating substrates. Their response to electric fields demonstrates the formation of highly resistive, fluid membranes.
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Bart Kahr Prof. Yonghong Bing Dr. Werner Kaminsky Prof. Davide Viterbo Prof. 《Angewandte Chemie (International ed. in English)》2009,48(21):3744-3748
A reputation restored : Eligio Perucca (see photo) first observed the enantioselective adsorption of a racemic mixture to a chiral crystal (NaClO3) in Turin in 1919. However, this milestone in enantioselective chemistry and chiroptics went unnoticed. Identified previously as a coward who refused in 1941 to supervise the research of the budding stereochemist Primo Levi because of the race laws, Perucca was opposed to the fascist regime.
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Stefania Pettirossi Dr. Gianfranco Bellachioma Prof. Gianluca Ciancaleoni Dr. Cristiano Zuccaccia Dr. Daniele Zuccaccia Dr. Alceo Macchioni Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5337-5347
Supra‐mega ion pairing : Multicationic organoruthenium dendrimers show a notable tendency to self‐aggregate when the concentration is increased, leading to megamers. This tendency increases with the generation. The self‐aggregation of dendrimers to megamers is coupled with a decrease in the extent of ion pairing, as illustrated.
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Victoria E. Campbell Xavier de Hatten Dr. Nicolas Delsuc Dr. Brice Kauffmann Dr. Ivan Huc Dr. Jonathan R. Nitschke Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(25):6138-6142
Systemic change : A system of transformations between helical structures was observed to be governed by interactions mediated by the electronic effects of substituents, entropic effects, the conformational preferences of organic building blocks, and the coordinative preferences of the metal ion. All of these effects were important, but all must be considered together to allow the prediction of the product observed (see scheme).
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Christos Raptis Hermenegildo Garcia Prof. Dr. Manolis Stratakis Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(17):3133-3136
ReacTiO 2 ns for rings : Gold nanoparticles supported on TiO2 are used as a novel heterogeneous catalyst for the isomerization of epoxides to allylic alcohols by a concerted mechanism (see scheme). The reaction proceeds in high yields and the product selectivity is often remarkable.
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Mohamed E. El‐Khouly Dr. Jung Hoon Kim Dr. Kwang‐Yol Kay Prof. Dr. Chan Soo Choi Dr. Osamu Ito Prof. Dr. Shunichi Fukuzumi Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5301-5310
Fast moving : A new pentad (see figure) composed of silicon phthalocyanine (SiPc), as electron donor, that is connected with two units of naphthalenediimide (NDI) and fullerene C60, as electron acceptors, undergoes fast and efficient charge‐separation processes via the NDI and SiPc singlet excited states.