slideshow 16 slideshow 1 slideshow 2 slideshow 3 slideshow 4 slideshow 5 slideshow 6 slideshow 7 slideshow 8 slideshow 0 slideshow 9 slideshow 10 slideshow 11 slideshow 12 slideshow 13 slideshow 14 slideshow 15

Articles from Wiley

Condividi contenuti
The latest chemistry from ChemPubSoc Europe and Wiley-VCH
Aggiornato: 2 settimane 3 giorni fa

Electrochemical Reduction of CO<sub>2</sub> with an Oxide-Derived Lead Nano-coralline Electrode in Dimcarb

4 aprile, 2017 - 00:00

Electrochemical Reduction of CO2 with an Oxide‐Derived Lead Nano‐coralline Electrode in Dimcarb

Lead on lead: Electroreduction of CO2 in the distillable ionic liquid dimethylammonium dimethylcarbamate (dimcarb) is investigated with an oxide-derived lead (od-Pb) electrode. Compared with unmodified polycrystalline Pb, where H2 is the dominant electrolysis product, od-Pb possesses impressive catalytic properties for the reduction of CO2, with faradaic efficiencies for the generation of CO and [HCOO]− of approximately 10 and 75 %, respectively.

[Article]
Lu Chen, Fengwang Li, Cameron L. Bentley, Mike Horne, Alan M. Bond, Jie Zhang
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201700217 Read article

Anodic Chlorination of Selenophene-Containing Polymers: Reaction Efficiency and Selective Reaction of Single Segment in Rod−Rod Diblockcopolymer

4 aprile, 2017 - 00:00

 Reaction Efficiency and Selective Reaction of Single Segment in Rod−Rod Diblockcopolymer

Time to split: Electrochemical post-functionalization, namely, the electrochemical polymer reaction (ECPR), of various selenophene-containing (co)polymers is comprehensively investigated. In the anodic chlorination of these polymer films, the degree of chlorination dramatically changes, depending on the main chain and side chain structures. Finally, a block copolymer is designed, which is capable of segment-selective ECPR.

[Communication]
Naoki Shida, Daichi Okazaki, Tomoyuki Kurioka, Hiroki Nishiyama, Dwight S. Seferos, Ikuyoshi Tomita, Shinsuke Inagi
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201700205 Read article

Synthesis of Robust Silicon Nanoparticles@Void@Graphitic Carbon Spheres for High-Performance Lithium-Ion-Battery Anodes

4 aprile, 2017 - 00:00

Synthesis of Robust Silicon Nanoparticles@Void@Graphitic Carbon Spheres for High‐Performance Lithium‐Ion‐Battery Anodes

Caught in the void: Robust silicon nanoparticles@void@graphitic carbon spheres (Si@void@C) as the anode of lithium-ion batteries are designed and demonstrated. This Si@void@C composite sphere-based anode shows a stable discharge capacity as high as 1565 mAhg−1 after 1000 cycles charge/discharge performances.

[Article]
Xiaomei Ma, Yujie Gao, Min Chen, Limin Wu
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201700173 Read article

Ultrafine TiO<sub>2</sub> Nanoparticles Confined in N-Doped Porous Carbon Networks as Anodes of High-Performance Sodium-Ion Batteries

4 aprile, 2017 - 00:00

Ultrafine TiO2 Nanoparticles Confined in N‐Doped Porous Carbon Networks as Anodes of High‐Performance Sodium‐Ion Batteries

Porous power: TiO2/N-doped porous carbon nanocomposites are fabricated by directly carbonizing NH2-MIL-125(Ti). The nanocomposites exhibit excellent sodium storage properties in terms of specific capacity, rate capability, and long-term cycling stability.

[Article]
Xuebo Zhao, Chunliu Yan, Xin Gu, Liangjun Li, Pengcheng Dai, Dawei Li, Hongyu Zhang
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201700159 Read article

Electrochemical Synthesis and Characterization of Flavin Mononucleotide-Exfoliated Pristine Graphene/Polypyrrole Composites

4 aprile, 2017 - 00:00

Electrochemical Synthesis and Characterization of Flavin Mononucleotide‐Exfoliated Pristine Graphene/Polypyrrole Composites

It's got potential: A comprehensive electrogeneration study is presented together with the electrochemical characterization of the attained electroactive graphene-polypyrrole composite films, with a focus on identifying the driving electrochemical reactions.

[Article]
Jose G. Martinez, Miguel Ayán-Varela, Juan I. Paredes, Silvia Villar-Rodil, Salvador D. Aznar-Cervantes, Toribio F. Otero
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201700047 Read article

An Electrochemiluminescent Biosensor Based on Interactions between a Graphene Quantum Dot−Sulfite Co-reactant System and Hydrogen Peroxide

4 aprile, 2017 - 00:00

An Electrochemiluminescent Biosensor Based on Interactions between a Graphene Quantum Dot−Sulfite Co‐reactant System and Hydrogen Peroxide

Feeling sensitive: Commonly used reducing reagent, sulfite (SO32−), could serve as a new type of electrochemiluminescence (ECL) co-reactant for graphene quantum dots (GQDs). Simple, sensitive, and selective ECL chemical and biological sensors are proposed for the detection of hydrogen peroxide (H2O2) and biologically interesting molecules based on interactions between the GQD/SO32− co-reactant ECL system and H2O2.

[Article]
Chen Zhou, Yingmei Chen, Xu You, Yongqiang Dong, Yuwu Chi
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201600921 Read article

Electrochemistry of Redox-Active Guest Molecules at β-Cyclodextrin-Functionalized Silicon Electrodes

4 aprile, 2017 - 00:00

Electrochemistry of Redox‐Active Guest Molecules at &#x3B2;‐Cyclodextrin‐Functionalized Silicon Electrodes

To transfer or not to transfer? Silicon surfaces are functionalized with &#x3B2;-cyclodextrin molecules to investigate the electronic coupling between these host monolayers and the substrate (see picture). The electron transfer of a ferrocene-based guest was found to be more favorable on p++ substrates compared to low-doped p-type surfaces.

[Article]
Janneke Veerbeek, Alejandro Méndez-Ardoy, Jurriaan Huskens
ChemElectroChem, April 04, 2017, https://doi.org/10.1002/celc.201600872 Read article

Silver-Promoted Dehydroaromatization of Ethylene over ZSM-5 Catalysts

4 aprile, 2017 - 00:00

Silver‐Promoted Dehydroaromatization of Ethylene over ZSM‐5 Catalysts

A silver lining: Comparison of Ag- and H-ZSM-5 catalysts in ethylene to liquids (ETL) reactions reveals that Ag+ (Lewis acid) sites promote ethylene dehydroaromatization with higher xylene selectivity than has been reported for other metal-exchanged zeolites, whereas H+ (Brønsted acid) sites are responsible for ethylene activation.

[Full Paper]
Ming-Feng Hsieh, Yunwen Zhou, Hari Thirumalai, Lars C. Grabow, Jeffrey D. Rimer
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201700192 Read article

The Synergistic Effect to Promote the Direct Conversion of Bioethanol into Isobutene over Ternary Multifunctional Cr<sub><i>x</i></sub>Zn<sub><i>y</i></sub>Zr<sub><i>z</i></sub>O<sub><i>n</i></sub> Catalysts

4 aprile, 2017 - 00:00

The Synergistic Effect to Promote the Direct Conversion of Bioethanol into Isobutene over Ternary Multifunctional CrxZnyZrzOn Catalysts

A select few: The introduction of chromium into the mesoporous Zn1Zr8On catalyst to give the Cr1Zn1Zr8On composite results in a 38 % increase in the selectivity to isobutene in the direct conversion of bioethanol. Two critical factors affect the surface properties of this catalyst and thus the selectivity to isobutene, that is, a balance of acid/base sites and favorable redox properties.

[Communication]
Feng Liu, Yong Men, Jinguo Wang, Xiaoxiong Huang, Yuanqiang Wang, Wei An
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201700154 Read article

Renewable Surfactants through the Hydroaminomethylation of Terpenes

4 aprile, 2017 - 00:00

Renewable Surfactants through the Hydroaminomethylation of Terpenes

Soap opera: Renewable building blocks for surfactants are obtained by the hydroaminomethylation of terpenes with conjugated 1,3-diene functionalities. With the Rh/1,2-bis(diphenylphosphino)ethane catalytic system, extraordinarily high turnover frequencies (up to 739 mol mol−1 h−1) and regioselectivities (S=97 %) are achieved. The synthesized cationic surfactants show surface activity similar to that of industrially established ones.

[Communication]
Thiemo A. Faßbach, Tom Gaide, Michael Terhorst, Arno Behr, Andreas J. Vorholt
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201700097 Read article

Single-Pot Conversion of Tetrahydrofurfuryl Alcohol into Tetrahydropyran over a Ni/HZSM-5 Catalyst under Aqueous-Phase Conditions

4 aprile, 2017 - 00:00

Single‐Pot Conversion of Tetrahydrofurfuryl Alcohol into Tetrahydropyran over a Ni/HZSM‐5 Catalyst under Aqueous‐Phase Conditions

A concerted action: A highly efficient earth-abundant and low-cost Ni/HZSM-5 catalyst for upgrading biomass-derived THFA into valuable chemicals was developed. THFA participates in a parallel hydrolysis/hydrogenolysis pathway over Ni/HZSM-5 to produce pentane polyols under aqueous-phase conditions, followed by acid-catalyzed dehydration pathways to form tetrahydropyran.

[Communication]
Elmira Soghrati, Catherine Choong, Chee Kok Poh, Sibudjing Kawi, Armando Borgna
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201601708 Read article

Cyclopentanone as an Alternative Linking Reactant for Heterogeneously Catalyzed Furfural Aldol Condensation

4 aprile, 2017 - 00:00

Cyclopentanone as an Alternative Linking Reactant for Heterogeneously Catalyzed Furfural Aldol Condensation

The strongest link: The use of cyclopentanone in the synthesis of diesel precursors by furfural aldol condensation is proposed. This reaction is catalyzed by a magnesium–zirconium mixed oxide. To optimize the C15 selectivity, different temperatures and initial furfural/cyclopentanone ratios are tested. Under the optimum conditions, yields for the desired C15 adduct are higher than 60 % in less than 4 h.

[Communication]
Jennifer Cueto, Laura Faba, Eva Díaz, Salvador Ordóñez
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201601655 Read article

Iron-Containing SSZ-39 (AEI) Zeolite: An Active and Stable High-Temperature NH<sub>3</sub>-SCR Catalyst

4 aprile, 2017 - 00:00

 An Active and Stable High‐Temperature NH3‐SCR Catalyst

Irons in the fire: Iron-containing SSZ-39 zeolite performs as a very active and hydrothermally stable catalyst for the selective catalytic reduction (SCR) of NOx with ammonia, particularly at elevated reaction temperatures (above 450 °C).

[Communication]
Nuria Martín, Peter N. R. Vennestrøm, Joakim R. Thøgersen, Manuel Moliner, Avelino Corma
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201601627 Read article

One-Pot Synthesis of Polyhydroquinoline Derivatives through Organic-Solid-Acid-Catalyzed Hantzsch Condensation Reaction

4 aprile, 2017 - 00:00

One‐Pot Synthesis of Polyhydroquinoline Derivatives through Organic‐Solid‐Acid‐Catalyzed Hantzsch Condensation Reaction

One pot, four components, and a sulfonated catalyst: A new and efficient sulfonic-acid-functionalized organic solid-acid catalyst SPPN with a large surface area shows excellent catalytic activity in the one-pot synthesis of biologically important polyhydroquinoline derivatives.

[Full Paper]
Sujan Mondal, Bidhan Chandra Patra, Asim Bhaumik
ChemCatChem, April 04, 2017, https://doi.org/10.1002/cctc.201601409 Read article

Synthetic Biomarker Design by Using Analyte-Responsive Acetaminophen

4 aprile, 2017 - 00:00

Synthetic Biomarker Design by Using Analyte‐Responsive Acetaminophen

In vivo detection of an analyte from blood: Analyte-responsive acetaminophen (APAP) can be used to estimate disease-associated analyte levels from an in vivo conversion index. As proof-of-concept, hydrogen peroxide-responsive APAP (HR-APAP) enabled in vivo H2O2 analysis from a blood sample following HR-APAP injection.

[Communication]
Tatsuya Nishihara, Joe Inoue, Sho Tabata, Shinnosuke Murakami, Takamasa Ishikawa, Natsumi Saito, Shinji Fukuda, Masaru Tomita, Tomoyoshi Soga
ChemBioChem, April 04, 2017, https://doi.org/10.1002/cbic.201700023 Read article

Encapsulating an Immunosuppressant Enhances Tolerance Induction by Siglec-Engaging Tolerogenic Liposomes

4 aprile, 2017 - 00:00

Encapsulating an Immunosuppressant Enhances Tolerance Induction by Siglec‐Engaging Tolerogenic Liposomes

Enhanced tolerance: The formulation of Siglec-engaging tolerance-inducing antigenic liposomes (STALs) encapsulated with immunosuppressant rapamycin (RAPA) was optimized and then investigated in vivo. That STALs+RAPA showed enhanced tolerance induction in naïve mice supports future development of STALs for the treatment of allergy and autoimmune diseases.

[Full Paper]
Lijuan Pang, Matthew S. Macauley, Britni M. Arlian, Corwin M. Nycholat, James C. Paulson
ChemBioChem, April 04, 2017, https://doi.org/10.1002/cbic.201600702 Read article

Cover Picture: (ChemistrySelect 10/2017)

3 aprile, 2017 - 00:00

 (ChemistrySelect 10/2017)

[Cover Picture]

ChemistrySelect, April 03, 2017, https://doi.org/10.1002/slct.201781001 Read article

Iron Ascorbic Acid Complex Coated TiO<sub>2</sub> Nanoparticles Enhancing Visible-Light Oxidation Performance

3 aprile, 2017 - 00:00

Iron Ascorbic Acid Complex Coated TiO2 Nanoparticles Enhancing Visible‐Light Oxidation Performance

A new and efficient iron-based photocatalyst has been prepared via covalent grafting of the iron ascorbic acid complex on TiO2 nanoparticle. The photocatalytic activity of the as-prepared nanocatalyst was demonstrated under visible light irradiation in the selective oxidation of various substrates such as benzyl alcohols, benzylic hydrocarbones, olefins and sulfides under green conditions and low catalyst loading.

[Full Paper]
Maasoumeh Jafarpour, Abdolreza Rezaeifard, Fahimeh Feizpour
ChemistrySelect, April 03, 2017, https://doi.org/10.1002/slct.201700178 Read article

Detailed Reaction Mechanism of Phenylboronic Acid with Alizarin Red S in Aqueous Solution: Re-Investigation with Spectrophotometry and Fluorometry

3 aprile, 2017 - 00:00

 Re‐Investigation with Spectrophotometry and Fluorometry

The reaction mechanism of phenylboronic acid with Alizarin Red S was fully reinvestigated; the reaction proceeded via 3 parallel pathways to form only the cyclic boronate ester in aqueous solution. In the acetic acid/acetate buffer solution, the reaction rate was accelerated by the outer-sphere complex formation between the trigonal phenylboronic acid and acetate ion. A detailed reaction mechanism involving the acceleration effect of the acetate buffer was proposed for the present reaction on the basis of a recent universal reaction mechanism.

[Full Paper]
Yota Suzuki, Tomoaki Sugaya, Satoshi Iwatsuki, Masahiko Inamo, Hideo D. Takagi, Akira Odani, Koji Ishihara
ChemistrySelect, April 03, 2017, https://doi.org/10.1002/slct.201700166 Read article

An Overview of 2-Styrylchromones: Natural Occurrence, Synthesis, Reactivity and Biological Properties

3 aprile, 2017 - 00:00

 Natural Occurrence, Synthesis, Reactivity and Biological Properties

(E)-2-Styrylchromones are a small group of naturally occurring oxygen heterocycles that have been attracting great attention due to their biological activities and also as starting materials in the synthesis of other bioactive oxygen and nitrogen heterocycles. The natural occurrence, reactivity and biological evaluation of these compounds are reviewed, together with methods for their synthesis.

[Microreview]
Clementina M. M. Santos, Artur M. S. Silva
Eur. J. Org. Chem., April 03, 2017, https://doi.org/10.1002/ejoc.201700003 Read article

Copyright © 2012 Società Chimica Italiana. All Rights Reserved.