28.03.2013 | Angewandte Chemie International Edition, 2013

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28.03.2013 | Xiaohong Liu, Jiasong Li, Cheng Hu, Qing Zhou, Wei Zhang, Meirong Hu, Juanzuo Zhou, Jiangyun Wang, Angewandte Chemie International Edition, 2013

A metal‐chelating unnatural amino acid (UAA) with an 8‐hydroxyquinoline functional group (HqAla) was enzymatically synthesized in one step. In their Communication (DOI: 10.1002/anie.201301307), J. Y. Wang and co‐workers show that incorporation of HqAla into fluorescent proteins shifts ...

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28.03.2013 | Fu‐Lai Yang, Shi‐Kai Tian, Angewandte Chemie International Edition, 2013

New S in town: Sulfonyl hydrazides smoothly undergo sulfenylation with indoles in the presence of 10 mol % I2 to give structurally diverse indole thioethers in moderate to excellent yields with extremely high regioselectivity. This study paves the way for the use of sulfonyl hydrazides as ...

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28.03.2013 | Xiaohong Liu, Jiasong Li, Cheng Hu, Qing Zhou, Wei Zhang, Meirong Hu, Juanzuo Zhou, Jiangyun Wang, Angewandte Chemie International Edition, 2013

Caught red‐shifted: A novel metal‐chelating unnatural amino acid with an 8‐hydroxyquinoline group (HqAla) can be enzymatically incorporated into GFP (see scheme). Substituting a Tyr residue in the chromophore of FPs with HqAla results in significantly red‐shifted excitation and emission ...

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28.03.2013 | Gang Wang, Baibiao Huang, Xiangchao Ma, Zeyan Wang, Xiaoyan Qin, Xiaoyang Zhang, Ying Dai, Myung‐Hwan Whangbo, Angewandte Chemie International Edition, 2013

Crystal power! Libethenite, Cu2(OH)PO4 (see 4–5 µm×1.5 µm image), absorbs strongly in the near‐infrared (NIR) region and is an effective photocatalyst for the decomposition of 2,4‐dichlorophenol in aqueous solution under NIR irradiation. This NIR activation of the photocatalyst is due to a ...

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28.03.2013 | Guangjun Tian, Yi Luo, Angewandte Chemie International Edition, 2013

Glow‐in‐the‐dark buckyballs: Reproduction of the fluorescence and phosphorescence spectra of single C60 molecules in a scanning tunneling microscope by simulations according to first principles (see picture) revealed the underlying mechanisms and enabled the correct assignment of the spectra.

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28.03.2013 | Naoya Kanbayashi, Kazuhiro Takenaka, Taka‐aki Okamura, Kiyotaka Onitsuka, Angewandte Chemie International Edition, 2013

Ru does it all: A novel example of an asymmetric auto‐tandem reaction catalyzed by a planar‐chiral cyclopentadienyl–ruthenium complex is described. The reaction of allylic chloride with α‐haloamides provides synthetically useful, diastereomerically and enantiomerically enriched γ‐lactams ...

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28.03.2013 | Li‐Chiang Lin, Jihan Kim, Xueqian Kong, Eric Scott, Thomas M. McDonald, Jeffrey R. Long, Jeffrey A. Reimer, Berend Smit, Angewandte Chemie International Edition, 2013

Hopping along: Metal–organic frameworks such as Mg‐MOF‐74 possess open metal sites that interact strongly with CO2. Molecular simulations reveal detailed CO2 dynamics (hops between metal sites and localized fluctuations), which can be used to accurately explain the experimentally measured ...

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28.03.2013 | Mareen Smuda, Marcus A. Glomb, Angewandte Chemie International Edition, 2013

Degradation mechanisms: 75 % of the Maillard degradation pathways of ascorbic acid can be explained by oxidative α fragmentation (31 %), β cleavage (32 %), and decarboxylation from hydrate/hemiaminal intermediates (12 %), which lead to carbonyl and dicarbonyl compounds, carboxylic acids, ...

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28.03.2013 | Krishnan K. Palaniappan, R. Matthew Ramirez, Vikram S. Bajaj, David E. Wemmer, Alexander Pines, Matthew B. Francis, Angewandte Chemie International Edition, 2013

NMR imaging: Filamentous fd bacteriophage expressing antibodies recognizing the epidermal growth factor receptor (EGFR) were modified to incorporate cage‐like xenon‐binding molecules (CryA). The resulting contrast agent was shown to bind to an EGFR‐positive cell line and detected by ...

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