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Integration of molecular and enzymatic catalysts on graphene for biomimetic generation of antithrombotic species
Enzymatic mimics, capable of catalysing cascading reactions under physiological conditions, can be formed from integrating multiple components. Here, the authors report a graphene–haemin–glucose oxidase system capable of biomimetic generation of antithrombotic species from abundant glucose and L-arginine.
- Teng Xue
- , Bo Peng
- & Yu Huang
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Diversity-oriented synthesis as a tool for identifying new modulators of mitosis
Diversity-oriented synthesis is a useful tool to synthesize libraries of structurally complex molecules. Here, the authors show the utility of this method by ultimately identifying a compound causing mitotic arrest and cancer cell death.
- Brett M. Ibbeson
- , Luca Laraia
- & David R. Spring
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Supramolecular high-aspect ratio assemblies with strong antifungal activity
Efficient and pathogen-specific antifungal agents are required to mitigate drug resistance problems. Here the authors present a series of cationic small molecules, which are easy to isolate and characterize, and which can self-assemble to give polymer-like antifungal activity and specificity.
- Kazuki Fukushima
- , Shaoqiong Liu
- & James L. Hedrick
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Functionalization of the living diatom Thalassiosira weissflogii with thiol moieties
Biomineralization processes have inspired the design of synthetic silica structures in vitro. Here, the authors use a living diatom to fabricate organo-silica constructs and are able to incorporate thiol moieties into the diatom frustule without the loss of nano-scale architectural features.
- Yvonne Lang
- , Francisco del Monte
- & Abhay Pandit
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Synthesis and physical properties of a ball-like three-dimensional π-conjugated molecule
Curved π-conjugated compounds, such as the fullerenes, have a variety of practical uses in addition to being structurally striking. Here, the authors demonstrate metal-mediated assembly and subsequent reductive elimination as an elegant synthetic route to a fully conjugated ball-like molecule.
- Eiichi Kayahara
- , Takahiro Iwamoto
- & Shigeru Yamago
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A copper-phyllosilicate core-sheath nanoreactor for carbon–oxygen hydrogenolysis reactions
Nanoscale copper catalysts are useful for the selective hydrogenation of carbon–oxygen bonds, although they may be deactivated under harsh conditions. Here the authors report the enhanced activity and stability of core-sheath copper-phyllosilicate nanoreactors due to electronic and morphological effects.
- Hairong Yue
- , Yujun Zhao
- & Jinlong Gong
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Gold peroxide complexes and the conversion of hydroperoxides into gold hydrides by successive oxygen-transfer reactions
Gold peroxide-derived complexes are important in oxidation catalysis, although structural information on these species is sparse. Here, the authors have synthesized a range of gold complexes and have shown a reaction pathway from peroxides to hydrides, via oxygen-transfer events.
- Dragoş-Adrian Roşca
- , Joseph A. Wright
- & Manfred Bochmann
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A ladder polysilane as a template for folding palladium nanosheets
Since the isolation of graphene, there has been extensive interest in other two-dimensional structures including metallic nanosheets. Here, the authors report the use of ladder polysilane ligands for the synthesis of palladium clusters containing eleven metal ions, made up of two heptametallic nanosheets.
- Yusuke Sunada
- , Ryohei Haige
- & Hideo Nagashima
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Solvent-free aerobic oxidation of hydrocarbons and alcohols with Pd@N-doped carbon from glucose
The development of efficient catalysts for the aerobic oxidation of hydrocarbons to high-value chemicals is industrially important. Here, the authors show that palladium nanoparticles loaded on porous nitrogen-doped carbon are highly active catalysts under laboratory and industrially relevant conditions.
- Pengfei Zhang
- , Yutong Gong
- & Yong Wang
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Homo-coupling of terminal alkynes on a noble metal surface
Acetylenes can be covalently linked by oxidative coupling reactions. Zhanget al. report terminal alkyne Csp-H bond activation and concomitant homo-coupling on a silver surface, yielding polymeric networks with a conjugated backbone.
- Yi-Qi Zhang
- , Nenad Kepčija
- & Johannes V. Barth
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Probing the catalytic activity of porous graphene oxide and the origin of this behaviour
Graphene oxide has been proposed as an alternative to precious metals for the catalysis of aerobic oxidative reactions; however, high catalyst loadings are needed. Here a simple base and acid treatment is shown to enhance its catalytic activity for the oxidative coupling of amines under ambient conditions.
- Chenliang Su
- , Muge Acik
- & Kian Ping Loh
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Stretchable heterogeneous composites with extreme mechanical gradients
Heterogeneous composite materials, which are potentially useful for flexible electronics, are widespread in nature but synthetic examples are rare. Here, a site-specific hierarchical approach is used to fabricate composites with extreme local variations in elastic modulus and which are reversibly stretchable.
- Rafael Libanori
- , Randall M. Erb
- & André R. Studart
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Biomimetic superelastic graphene-based cellular monoliths
The exploitation of the properties of graphene, such as mechanical strength and electrical conductivity, in deformable macroscopic materials is desirable. Here, a combination of graphene chemistry and ice physics is used to fabricate biomimetic, ultralight and superelastic graphene cellular monoliths.
- Ling Qiu
- , Jeffery Z. Liu
- & Dan Li
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A seamless three-dimensional carbon nanotube graphene hybrid material
Graphene and single-walled carbon nanotubes have high electrical conductivities and large specific surface areas. Here, these properties are extended into three dimensions by producing a seamless carbon nanotube graphene hybrid material.
- Yu Zhu
- , Lei Li
- & James M. Tour
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| Open AccessCarbon nanotube–liposome supramolecular nanotrains for intelligent molecular-transport systems
There is growing interest in the development of artificial molecular-transport systems. Miyakoet al. develop a supramolecular system consisting of carbon nanotubes and liposomes that allows the directional transport and controlled release of cargo molecules.
- Eijiro Miyako
- , Kenji Kono
- & Yoshihisa Hagihara
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| Open AccessSynthesis of chiral TiO2 nanofibre with electron transition-based optical activity
Optical activity resulting from electronic transitions in chiral inorganic materials is rare. Liu et al. report the synthesis of amino acid-derived amphiphile templated chiral TiO2fibres, which exhibit an optical response to polarized light resulting from valence to conduction band electronic transitions.
- Shaohua Liu
- , Lu Han
- & Shunai Che
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Scalable organocatalytic asymmetric Strecker reactions catalysed by a chiral cyanide generator
The Strecker synthesis is an established method for the production of α-amino acids. Here, a scalable catalytic asymmetric Strecker reaction is reported that allows one-pot synthesis of enantiomerically pure α-amino acids.
- Hailong Yan
- , Joong Suk Oh
- & Choong Eui Song
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A non-syn-gas catalytic route to methanol production
Methanol is an important industrial chemical and liquid fuel, and is usually produced by the syn-gas route from natural gas. Wuet al. develop a new catalytic process that directly converts ethylene glycol, derived from biomass or fossil fuels, to methanol in hydrogen using a Pd/Fe2O3co-precipitated catalyst.
- Cheng-Tar Wu
- , Kai Man Kerry Yu
- & Shik Chi Edman Tsang
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Biomimetic layer-by-layer assembly of artificial nacre
Nacre is an organic–inorganic composite biomaterial, which consists of an ordered multilayer structure of crystalline calcium carbonate platelets separated by porous organic layers. Finnemoreet al. present a route to artificial nacre which mimics the natural layer-by-layer biosynthesis.
- Alexander Finnemore
- , Pedro Cunha
- & Ullrich Steiner
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Enantioselective synthesis of a chiral nitrogen-doped buckybowl
Nitrogen-doped fullerenes and carbon nanotubes have been produced, but the synthesis of nitrogen-doped buckybowls, is an unsolved challenge. Tanet al. report an enantioselective synthesis of triazasumanene, and show that nitrogen doping leads to deeper bowl structures than in all-carbon buckybowls.
- Qitao Tan
- , Shuhei Higashibayashi
- & Hidehiro Sakurai
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Non-polydimethylsiloxane devices for oxygen-free flow lithography
Flow lithography is used to synthesize microparticles but relies on polydimethylsiloxane microchannels for oxygen to permeate and inhibit polymerization near channel interfaces. Now, non-polydimethylsiloxane devices have been developed, which allow oxygen-free lithography, increasing the capabilities of flow lithography.
- Ki Wan Bong
- , Jingjing Xu
- & Patrick S. Doyle
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| Open AccessGeometry analysis and systematic synthesis of highly porous isoreticular frameworks with a unique topology
Zhanget al. show that simple geometry analysis can be used to predict how linker length and length ratios affect pore shape and size of porous coordination polymers. The accuracy of the predictions is confirmed by the synthesis of a series of 13 highly porous isoreticular frameworks.
- Yue-Biao Zhang
- , Hao-Long Zhou
- & Xiao-Ming Chen
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Metallosupramolecular self-assembly of a universal 3-ravel
There has been recent progress in the synthesis of complex intertwined supramolecular topologies. In this study, Liet al.report the self-assembly of an intertwined structure based on a universal 3-ravel.
- Feng Li
- , Jack K. Clegg
- & George V. Meehan
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