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Jorge Bordello Belén Reija Dr. Wajih Al‐Soufi Prof. Dr. Mercedes Novo Prof. Dr. 《Chemphyschem》2009,10(6):931-939
Buckle up! The dimerization of small fluorescent guests is strongly enhanced in presence of a cyclodextrin host. The host cavity acts like a belt to assist the self‐assembly of guests (see picture). Small variations in the guest structure have significant influence on the stability and geometry of the aggregates.
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Thomas K. Wood Warren E. Piers Brian A. Keay Masood Parvez 《Angewandte Chemie (International ed. in English)》2009,48(22):4009-4012
2009: A boraanthracene odyssey : General routes to boraanthracene derivatives—long proposed, but never observed—are disclosed, along with the structural and photophysical properties of these compounds and their remarkable reactivity towards oxygen.
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Christian Wasmer Laura Benkemoun Dr. Raimon Sabaté Dr. Michel O. Steinmetz Dr. Bénédicte Coulary‐Salin Dr. Lei Wang Dr. Roland Riek Prof. Sven J. Saupe Dr. Beat H. Meier Prof. 《Angewandte Chemie (International ed. in English)》2009,48(26):4858-4860
Protein deposition frequently occurs as inclusion bodies (IBs) during heterologous protein expression in E. coli. The structure of these E. coli IBs of the prion‐forming domain from the fungal prion HET‐s is the same as that previously determined for fibrils assembled in vitro, and show prion infectivity. These results demonstrate that the IBs of HET‐s(218–289) are amyloids.
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Hai‐Hua Lu Hui Liu Dr. Wei Wu Xu‐Fan Wang Liang‐Qiu Lu Wen‐Jing Xiao Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2742-2746
Economical approach : The first organocatalytic asymmetric intramolecular hydroarylation of phenol‐ and aniline‐derived enals offers one of the most straightforward and atom‐economic approaches to enantioriched chromans and tetrahydroquinolines (up to 96 % ee; see scheme).
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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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P. Fita Dr. N. Urbańska Dr. C. Radzewicz Prof. Dr. J. Waluk Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(19):4851-4856
Reaction rates from polarized spectroscopy : A new method based on ultrafast pump–probe polarization spectroscopy enables the measurement of the ground‐ and excited‐state reaction rates for self‐exchange processes. The technique was used to study double hydrogen transfer in porphycene and its derivatives (see figure).
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Synthesis of 2‐(Selenophen‐2‐yl)pyrroles and Their Electropolymerization to Electrochromic Nanofilms
Boris A. Trofimov Prof. Dr. Elena Yu. Schmidt Dr. Albina I. Mikhaleva Prof. Dr. Cristina Pozo‐Gonzalo Jose A. Pomposo Maitane Salsamendi Nadezhda I. Protzuk Dr. Nadezhda V. Zorina Dr. Andrey V. Afonin Dr. Alexander V. Vashchenko Dr. Ekaterina P. Levanova Dr. Galina G. Levkovskaya Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(26):6435-6445
Bridging pyrrole and selenophene chemistries : Molecular assemblies have been developed that allow scrutiny of the electronic communication between pyrrole and selenophene nuclei. Divergent syntheses of 2‐(selenophen‐2‐yl)pyrroles and their N‐vinyl derivatives from available 2‐acylselenophenes and acetylenes in a one‐pot procedure have been devised (see scheme), which provide access to these exotic heterocyclic ensembles.
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Haakan N. Joensson Michael L. Samuels Dr. Eric R. Brouzes Dr. Martina Medkova Dr. Mathias Uhlén Prof. Darren R. Link Dr. Helene Andersson‐Svahn Prof. 《Angewandte Chemie (International ed. in English)》2009,48(14):2518-2521
Finding the few : Cell‐surface proteins are useful disease biomarkers, but current high‐throughput methods are limited to detecting cells expressing more than several hundred proteins. Enzymatic amplification in microfluidic droplets (see picture) is a high‐throughput method for detection and analysis of cell‐surface biomarkers expressed at very low levels on individual human cells. Droplet optical labels allow concurrent analysis of several samples.
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Christina M. Longo Yang Wei Mary F. Roberts Prof. Scott J. Miller Prof. 《Angewandte Chemie (International ed. in English)》2009,48(23):4158-4161
The big “DIP”per : The preparation of both l,l ‐DIP and l,d ‐DIP (see structures) involves a complex case of double asymmetric induction in the key step of the synthesis. The differential ability of each isomer to contribute to thermoprotection in the context of a key enzyme has been assessed and both isomers of DIP are shown to possess biological activity.
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Direct visualization of photoinduced tunneling charge transfer (TCT) in an Au5/para‐aminothiophenol (PATP)/Ag6 junction in which Au and Ag clusters form the first and second layer, respectively, is provided by the charge difference density (see picture; green and red stand for holes and electrons, respectively).