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1.
Sunghyun Kim Jeong Won Park Dongkyu Kim Daejin Kim In‐Hyun Lee Sangyong Jon Prof. 《Angewandte Chemie (International ed. in English)》2009,48(23):4138-4141
Seeing is sensing : Calsequestrin (CSQ) functionalized gold nanoparticles undergo calcium‐dependent CSQ polymerization, which results in a clear color change (see picture) together with precipitation. The sensing system is specific for Ca2+ ions and the differences between normal and disease‐associated abnormal (hypercalcemia) Ca2+ ion levels in serum can be distinguished with the naked eye.
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Toshihiko Sone Gang Lu Shigeki Matsunaga Dr. Masakatsu Shibasaki Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(9):1677-1680
Better the second time around : The title compounds were synthesized by using a one‐pot double methylene transfer catalyzed by a heterobimetallic La/Li complex. Chiral amplification in the second step was the key to obtaining oxetanes in high enantiomeric excess (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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Benito Alcaide Prof. Dr. Pedro Almendros Dr. Rocío Carrascosa Dipl.‐Chem. Teresa Martínez del Campo Dipl.‐Chem. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(11):2496-2499
Positive discrimination : Chemo‐ and regioselective palladium‐catalyzed cycloetherification of allendiols, namely β,γ‐ and γ,δ‐allendiols, may occur by judicious choice of palladium‐catalyzed conditions owing to their potential ability to discriminate between both nucleophilic sites (see scheme).
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Dan Xu Zhaoping Liu Dr. Hongzhou Yang Dr. Qingsheng Liu Dr. Jun Zhang Jiye Fang Prof. Dr. Shouzhong Zou Prof. Dr. Kai Sun Dr. 《Angewandte Chemie (International ed. in English)》2009,48(23):4217-4221
Shape‐controlled catalysis : High‐quality Pt–Cu nanocubes with an average size of about 8 nm (see picture, scale bar=20 nm) were synthesized from a high‐temperature organic solution system in the presence of various capping ligands. These cubic Pt–Cu nanocrystals terminated with {100} facets demonstrated a superior catalytic activity towards methanol oxidation compared to similar sized Pt–Cu and Pt nanospheres.
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Daryl A. Guthrie John D. Tovar Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5176-5185
No protection? A unique, albeit fairly specialized, example of what promises to be a useful retrosynthetic consideration for those designing complex π‐molecular systems, namely, using conformation as a protecting group to shield a given reactive site in lieu of protecting‐group manipulation, is described (see scheme).
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Lei Gong Dr. Zhening Chen Yumei Lin Xumin He Prof. Dr. Ting Bin Wen Prof. Dr. Xin Xu Prof. Dr. Haiping Xia Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(25):6258-6266
Osmabenzenes can be easily synthesized from two η2‐coordinated olefin osmacycles in the presence of benzonitrile by means of facile hydrogen‐transfer conversions (see graphic). Mechanisms for the formation of osmabenzenes are proposed based on DFT calculations.
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Raymond Ziessel Dr. Mohammed A. H. Alamiry Dr. Kristopher J. Elliott Anthony Harriman Prof. 《Angewandte Chemie (International ed. in English)》2009,48(15):2772-2776
Cutting the corner : An excellent agreement has been obtained between experimental and computed coulombic coupling matrix elements for donor–spacer–acceptor systems, which consist of a boron dipyrromethane donor and acceptor in various stages of protonation. This correlation occurs in spite of reservations about the validity of Förster theory being applied to intramolecular electronic energy transfer (ET) over short (e.g., 20 Å) distances (see picture).
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《Angewandte Chemie (International ed. in English)》2009,48(25):4472-4472
My favorite subject at school was Chemistry. I chose chemistry as a career because I love the fact we can “Just Do It” without over‐thinking. This and more about Wenbin Lin can be found on page 4472.
11.
Andrei Ghicov Sergiu P. Albu Robert Hahn Doohun Kim Thomas Stergiopoulos Dr. Julia Kunze Dr. Carl‐Albrecht Schiller Polycarpos Falaras Prof. Patrik Schmuki Prof. 《化学:亚洲杂志》2009,4(4):520-525
Particle vs tube : The present paper systematically investigates a range of fundamental geometrical and structural features of TiO2 nanotube layers and their effect on the dye‐sensitized solar cell conversion efficiency, to deduce the most promising strategies for improvement. It is found that the performance of the cells strongly depends on the morphology and crystalline structure of the nanotubes.
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Alan D. Payne Dr. Gomotsang Bojase Michael N. Paddon‐Row Prof. Michael S. Sherburn Prof. 《Angewandte Chemie (International ed. in English)》2009,48(26):4836-4839
Back from obscurity : The practical synthesis of the first six members of the fundamental class of acyclic branched oligoalkenes has been achieved. The syntheses allow access to the target compounds on multigram scales in good yields. Members of the family with even numbers of double bonds are significantly more stable than those with odd numbers (see picture), and exhibit different chemical reactivities in Diels–Alder reactions.
14.
Ludovic Drouin Dr. E. Cristina Stanca‐Kaposta Dr. Priptal Saundh Antony J. Fairbanks Dr. Sebastian Kemper Timothy D. W. Claridge Dr. John P. Simons Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(16):4057-4069
The effect of carbon is subtle but sweet : The flexible C‐linkage in the newly synthesised C‐glycosyl mimetic, Manα(1,6)‐C‐ManαOPh allows OH? π bonding, both in the gas phase and in aqueous solution. This interaction is absent in the O‐linked disaccharide (see figure).
15.
Christopher R. So Candan Tamerler Prof. Mehmet Sarikaya Prof. 《Angewandte Chemie (International ed. in English)》2009,48(28):5174-5177
Go for the gold! The structural evolution of peptide binding and assembly on a Au(111) surface is dynamic and involves surface diffusion and multiple stages of molecular thin‐film topology development (see schematic depiction and corresponding AFM images). The new fundamental observations may form the basis of peptide‐based novel hybrid molecular technologies of the future.
16.
Modeling magnetism: The antiferromagnetic ground state of the C60/Si(001)‐c(4×4) surface is predicted by means of density functional theory calculations. Two adjacent dangling bonds (DBs) generated by the adsorption of C60 are antiferromagnetically coupled with each other. This study demonstrates that magnetic Si surfaces can be prepared by engineering single Si DBs with unpaired electrons.
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Benjamin J. Bythell Dr. Undine Erlekam Dr. Béla Paizs Dr. Philippe Maître Dr. 《Chemphyschem》2009,10(6):883-885
Most proteins in proteomics are identified from tandem mass spectra of doubly protonated tryptic peptides. Statistical studies indicate that these spectra fall into two distinct classes. IR spectroscopy experiments and DFT calculations performed on model b2 ions show that peptides producing Class I spectra form protonated oxazolone ions (see figure) and not protonated diketopiperazines as proposed elsewhere.
19.
Rika Iwaura Dr. Mayumi Ohnishi‐Kameyama Dr. Tomohiko Iizawa 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3729-3735
Driven round the twist by DNA : One‐dimensional helical J‐aggregates are formed by the self‐assembly of thymidylic acid appended anthracene dye (shown in red and yellow) in the presence of complementary single‐stranded oligoadenylic acid (shown in green and blue) in an aqueous solution.