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Advances in Polymer Technology

Thermal stability, fire behavior, and fumes emission of polyethylene nanocomposites with halogen‐free fire retardants

Published: 24 November 2017

Author(s): Kamila Sałasińska, Monika Borucka, Maciej Celiński, Agnieszka Gajek, Wojciech Zatorski, Kamila Mizera, Milena Leszczyńska, Joanna Ryszkowska

Abstract The synergism between nanoparticles and different kinds of halogen‐free fire retardants leading to reduction in flammability and smoke generation of polyethylene was investigated. The composites were evaluated by thermogravimetric analysis, oxygen index test, cone calorimeter measurements, and a single‐chamber test. Moreover, the semivolatile and volatile compounds evolved in the thermal degradation processes of...

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Journal of the American Ceramic Society

Relaxor nature in Ba 5 RZr 3 Nb 7 O 30 (R = La, Nd, Sm) tetragonal tungsten bronze new system

Published: 24 November 2017

Author(s): Wen Bin Feng, Xiao Li Zhu, Xiao Qiang Liu, Mao Sen Fu, Xiao Ma, Shu Jing Jia, Xiang Ming Chen

Abstract Ba5RZr3Nb7O30(R = La, Nd, Sm) lead‐free relaxor ferroelectrics were prepared by a standard solid‐state reaction process, and the influence of A and B site ion occupation on the dielectric characteristics especially the relaxor nature were investigated systematically. Tetragonal tungsten bronze structure with space group P4/mbm was determined for all compositions, ion cross distribution by Ba2+ and R3+ in A1 site was observed,...

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ChemSusChem

Role of Co‐Sensitizers in Dye‐Sensitized Solar Cells

Published: 24 November 2017

Author(s): Narra Vamsi Krishna, Jonnadula Venkata Suman Krishna, Madoori Mrinalini, Seelam Prasanthkumar, Lingamallu Giribabu

Abstract Co‐sensitization is a popular route towards improved efficiency and stability of dye‐sensitized solar cells (DSSCs). In this context, the power conversion efficiency (PCE) values of DSSCs incorporating Ru‐ and porphyrin‐based dyes can be improved from 8–11 % to 11–14 % after the addition of additives, co‐adsorbents, and co‐sensitizers that reduce aggregation and charge recombination in the device. Among the three supporting...

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ChemSusChem

WtF‐Nano: One‐Pot Dewatering and Water‐Free Topochemical Modification of Nanocellulose in Ionic Liquids or γ‐Valerolactone

Published: 24 November 2017

Author(s): Tiina Laaksonen, Jussi K. J. Helminen, Laura Lemetti, Jesper Långbacka, Daniel Rico del Cerro, Michael Hummel, Ilari Filpponen, Antti H. Rantamäki, Tia Kakko, Marianna L. Kemell, Susanne K. Wiedmer, Sami Heikkinen, Ilkka Kilpeläinen, Alistair W. T. King

Abstract Ionic liquids are used to dewater a suspension of birch Kraft pulp cellulose nanofibrils (CNF) and as a medium for water‐free topochemical modification of the nanocellulose (a process denoted as “WtF‐Nano”). Acetylation was applied as a model reaction to investigate the degree of modification and scope of effective ionic liquid structures. Little difference in reactivity was observed when water was removed, after...

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ChemSusChem

Complete Depolymerization and Repolymerization of a Sugar Poly(orthoester)

Published: 24 November 2017

Author(s): Lingyao Li, Sampa Maiti, Nicole A. Thompson, Ian J. Milligan, Wenjun Du

Abstract The capability of a polymer to depolymerize, regenerating its original monomer for further polymerization, is very attractive in terms of sustainability. Recently discovered sugar poly(orthoesters) are an important class of glycopolymer. The high sensitivity of the backbone orthoester linkage toward acidolysis provides a valuable model to study the depolymerization. Herein, a sugar poly(orthoester) is shown to be completely...

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Fuel Cells

Shape Optimization of PEMFC Flow‐channel Cross‐Sections

Published: 24 November 2017

Author(s): I. Korkischko, B. S. Carmo, F. C. Fonseca

Abstract This paper presents the modeling, simulation and optimization of a single channel proton exchange membrane fuel cell (PEMFC) using computational fluid dynamics methods. The shape optimization of the flow‐channels was employed to improve the electrical performance of the fuel cell. The maximization of the current density was the objective function of the single‐objective optimization problem, the upper and lower widths of...

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Angewandte Chemie International Edition

Enantioselective Rhodium‐Catalyzed Coupling of Arylboronic Acids, 1,3‐Enynes, and Imines by Alkenyl‐to‐Allyl 1,4‐Rhodium(I) Migration

Published: 24 November 2017

Author(s): Michael Callingham, Benjamin M. Partridge, William Lewis, Hon Wai Lam

Abstract A chiral rhodium complex catalyzes the highly enantioselective coupling of arylboronic acids, 1,3‐enynes, and imines to give homoallylic sulfamates. The key step is the generation of allylrhodium(I) species by alkenyl‐to‐allyl 1,4‐rhodium(I) migration.

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Angewandte Chemie International Edition

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

Published: 24 November 2017

Author(s): Katherine Margulis, Xiangyi Zhang, Lydia‐Marie Joubert, Karsten Bruening, Christopher J. Tassone, Richard N. Zare, Robert M. Waymouth

Abstract Template‐free fabrication of non‐spherical polymeric nanoparticles is desirable for various applications, but has had limited success owing to thermodynamic favorability of sphere formation. Herein we present a simple way to prepare cubic nanoparticles of block copolymers by self‐assembly from aqueous solutions at room temperature. Nanocubes with edges of 40–200 nm are formed spontaneously on different surfaces upon water...

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Angewandte Chemie International Edition

Raymond Schaak

Published: 24 November 2017

thumbnail image: Angewandte Chemie International Edition

Angewandte Chemie

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

Published: 24 November 2017

Author(s): Katherine Margulis, Xiangyi Zhang, Lydia‐Marie Joubert, Karsten Bruening, Christopher J. Tassone, Richard N. Zare, Robert M. Waymouth

Abstract Template‐free fabrication of non‐spherical polymeric nanoparticles is desirable for various applications, but has had limited success owing to thermodynamic favorability of sphere formation. Herein we present a simple way to prepare cubic nanoparticles of block copolymers by self‐assembly from aqueous solutions at room temperature. Nanocubes with edges of 40–200 nm are formed spontaneously on different surfaces upon water...

thumbnail image: Angewandte Chemie

Most-accessed articles from each ChemPubSoc Europe, ACES, and GDCh journal

October 2017

 


Bryan D. Ellis, Christopher D. Vanderwal
Hughes and Gleason's Virosaine A-Appreciating the Art in Synthesis [Highlight]
Angew. Chem. Int. Ed. 2017, vol. 56, p. 13940

Klaus F. Wagenbauer, Floris A. S. Engelhardt, Evi Stahl, Vera K. Hechtl, Pierre Stömmer, Fabian Seebacher, Letizia Meregalli, Philip Ketterer, Thomas Gerling, Hendrik Dietz
How We Make DNA Origami [Concept]
ChemBioChem 2017, vol. 18, p. 1873

Konstantinos C. Christoforidis, Paolo Fornasiero
Photocatalytic Hydrogen Production: A Rift into the Future Energy Supply [Review]
ChemCatChem 2017, vol. 9, p. 1523

Matthias Ducci
Geheimtinten [Artikel]
Chem. Unserer Zeit 2017, vol. 51, p. 228

Balaram Mukhopadhyay, Rituparna Das
Chemical O-Glycosylations: An Overview [Review]
ChemistryOpen 2016, vol. 5, p. 401

Hanshen Xin, Xike Gao
Application of Azulene in Constructing Organic Optoelectronic Materials: New Tricks for an Old Dog [Minireview]
ChemPlusChem 2017, vol. 82, p. 945

Miaofang Chi, Harry M. Meyer, Zili Wu, Liangbo Liang, Peter V. Bonnesen, Dale K. Hensley, Rui Peng, Yang Song, Cheng Ma, Bobby G. Sumpter, Adam J. Rondinone
High-Selectivity Electrochemical Conversion of CO2 to Ethanol using a Copper Nanoparticle/N-Doped Graphene Electrode [Full Paper]
ChemistrySelect 2016, vol. 1, p. 6055

Ekkehard Schwab, Sebastian Schiebahn, Georg Schaub, Martin Reuter, Konstantin Räuchle, Ludolf Plass, Marcell Peuckert, Anja Metzelthin, Falko Mahlendorf, Wolfram Koch, Renate Hoer, Angelika Heinzel, Sigmar Bräuninger, Martin Bertau, Christian Beilmann, Florian Ausfelder, Ferdi Schüth, Detlef Stolten, Gisa Teßmer, Kurt Wagemann, Karl-Friedrich Ziegahn
Energiespeicherung als Element einer sicheren Energieversorgung [Übersichtsbeitrag]
Chem. Ing. Tech. 2015, vol. 87, p. 17

Abas Mohsenzadeh, Akram Zamani, Mohammad J. Taherzadeh
Bioethylene Production from Ethanol: A Review and Techno-economical Evaluation [Review]
ChemBioEng Rev. 2017, vol. 4, p. 75

Robert A. W. Dryfe, Briony Setterfield-Price, Joanne Tory, František Hartl
[M(CO)4(2,2′‐bipyridine)] (M=Cr, Mo, W) Complexes as Efficient Catalysts for Electrochemical Reduction of CO2 at a Gold Electrode [Communication]
ChemElectroChem 2015, vol. 2, p. 213

Yinghui Xue, Qin Zhang, Tao Zhang, Lei Fu
Black Phosphorus: Properties, Synthesis, and Applications in Energy Conversion and Storage [Focus Review]
ChemNanoMat 2017, vol. 3, p. 352

Flavia Izzo, Martina Schäfer, Robert Stockman, Ulrich Lücking
A New, Practical One-Pot Synthesis of Unprotected Sulfonimidamides by Transfer of Electrophilic NH to Sulfinamides [Full Paper]
Chem. Eur. J. 2017, vol. 23, p. 15189

Sandip G. Agalave, Suleman R. Maujan, Vandana S. Pore
Click Chemistry: 1,2,3‐Triazoles as Pharmacophores [Focus Review]
Chem. Asian J. 2011, vol. 6, p. 2696

Andrea Gualandi, Luca Mengozzi, Pier Giorgio Cozzi
Iron-Promoted Radical Reactions: Current Status and Perspectives [Focus Review]
Asian J. Org. Chem. 2017, vol. 6, p. 1160

Paramita Mukherjee, Martin Pettersson, Jason K. Dutra, Longfei Xie, Christopher W. am Ende
Trifluoromethyl Oxetanes: Synthesis and Evaluation as a tert-Butyl Isostere [Communication]
ChemMedChem 2017, vol. 12, p. 1574

David D. Evanoff, George Chumanov
Synthesis and Optical Properties of Silver Nanoparticles and Arrays [Minireview]
ChemPhysChem 2005, vol. 6, p. 1221

Jonathan E. Barnsley, Bethany A. Lomax, James R. W. McLay, Christopher B. Larsen, Nigel T. Lucas, Keith C. Gordon
Flicking the Switch on Donor-Acceptor Interactions in Hexaazatrinaphthalene Dyes: A Spectroscopic and Computational Study [Article]
ChemPhotoChem 2017, vol. 1, p. 432

An-Na Cho, Nam-Gyu Park
Impact of Interfacial Layers in Perovskite Solar Cells [Review]
ChemSusChem 2017, vol. 10, p. 3687

Ross J. Marshall, Ross S. Forgan
Postsynthetic Modification of Zirconium Metal-Organic Frameworks [Microreview]
Eur. J. Inorg. Chem. 2016, p. 4310

Francesca Leonelli, Marinella Capuzzi, Vincenzo Calcagno, Pietro Passacantilli, Giovanni Piancatelli
Stereoselective Michael‐Type Addition of Organocopper Reagents to Enones Derived from Glycals in the Synthesis of 2‐Phosphono‐α‐C‐Glycosides [Short Communication]
Eur. J. Org. Chem. 2005, p. 2671

Biochemische und molekularbiologische Analytik [Bericht]
Lebensmittelchemie 2017, vol. 71, p. 13

Maren Bulmahn
Titandioxid: schön oder schädlich [Industrie & Technik]
Nachr. Chem. 2017, vol. 65, p. 1008

Dominique Rosenberg, Svenja Pansegrau, Mirco Wachholz, Alexander Rehling, Maike Busker, Walter Jansen
Redox-Flow-Batterien - Organische Batterien mit Zukunftsperspektiven [Artikel]
CHEMKON 2017, vol. 24, p. 325

Catharina Goedecke
Why Does Iodine Turn Starch Blue?
ChemViews Magazine 2016

Most cited articles from each ChemPubSoc Europe, ACES, and GDCh journal


2016

 


Shoujun Zhu, Qingnan Meng, Lei Wang, Junhu Zhang, Yubin Song, Han Jin, Kai Zhang, Hongchen Sun, Haiyu Wang, Bai Yang
Highly Photoluminescent Carbon Dots for Multicolor Patterning, Sensors, and Bioimaging
Angew. Chem. Int. Ed. 2013, vol. 52, pp. 3953–3957

Balayeshwanth R. Vummidi, Jawad Alzeer, Nathan W. Luedtke
Fluorescent Probes for G-Quadruplex Structures [Review]
ChemBioChem 2013, vol. 14, pp. 540–558

Zhi-Yuan Gu, Jihye Park, Aaron Raiff, Zhangwen Wei, Hong-Cai Zhou
Metal–Organic Frameworks as Biomimetic Catalysts [Minireview]
ChemCatChem 2014, vol. 6, pp. 67–75

Anthony J. Arduengo, Roland Krafczyk
Auf der Suche nach Stabilen Carbenen [Organische Chemie]
Chem. Unserer Zeit 1998, vol. 32, pp. 6–14

Marc Steinmetz, Stefan Grimme
Benchmark Study of the Performance of Density Functional Theory for Bond Activations with (Ni,Pd)-Based Transition-Metal Catalysts [Full Paper]
ChemistryOpen 2013, vol. 2, pp. 115–124

Philipp Scharf, Jens Müller
Nucleic Acids With Metal-Mediated Base Pairs and Their Applications [Review]
ChemPlusChem 2013, vol. 78, pp. 20–34

Philipp Kaiser, Rajabhau Bajirao Unde, Christoph Kern, Andreas Jess
Production of Liquid Hydrocarbons with CO2 as Carbon Source based on Reverse Water-Gas Shift and Fischer-Tropsch Synthesis [Research Article]
Chem. Ing. Tech. 2013, vol. 85, pp. 489–499

Xiaosi Zhou, Yu-Guo Guo
Highly Disordered Carbon as a Superior Anode Material for Room-Temperature Sodium-Ion Batteries [Communication]
ChemElectroChem 2014, vol. 1, pp. 83–86

Chuanxi Wang, Zhenzhu Xu, Chi Zhang
Polyethyleneimine-Functionalized Fluorescent Carbon Dots: Water Stability, pH Sensing, and Cellular Imaging [Full Paper]
ChemNanoMat 2015, vol. 1, pp. 122–127

Konggang Qu, Jiasi Wang, Jinsong Ren, Xiaogang Qu
Carbon Dots Prepared by Hydrothermal Treatment of Dopamine as an Effective Fluorescent Sensing Platform for the Label-Free Detection of Iron(III) Ions and Dopamine [Full Paper]
Chem. Eur. J. 2013, vol. 19, pp. 7243–7249

Yinuo Wu, Jun Wang, Fei Mao, Fuk Yee Kwong
Palladium-Catalyzed Cross-Dehydrogenative Functionalization of C(sp2)–H Bonds [Focus Review]
Chem. Asian J. 2014, vol. 9, pp. 26–47

Naohiko Yoshikai, Ye Wei
Synthesis of Pyrroles, Indoles, and Carbazoles through Transition-Metal-Catalyzed C–H Functionalization [Review]
Asian J. Org. Chem. 2013, vol. 2, pp. 466–478

Lluís Ballell, Robert H. Bates, Rob J. Young, Daniel Alvarez-Gomez, Emilio Alvarez-Ruiz, Vanessa Barroso, Delia Blanco, Benigno Crespo, Jaime Escribano, Rubén González, Sonia Lozano, Sophie Huss, Angel Santos-Villarejo, José Julio Martín-Plaza, Alfonso Mendoza, María José Rebollo-Lopez, Modesto Remuiñan-Blanco, José Luis Lavandera, Esther Pérez-Herran, Francisco Javier Gamo-Benito, José Francisco García-Bustos, David Barros, Julia P. Castro, Nicholas Cammack
Fueling Open-Source Drug Discovery: 177 Small-Molecule Leads against Tuberculosis [Full Paper]
ChemMedChem 2013, vol. 8, pp. 313–321

Peter Politzer, Jane S. Murray
Halogen Bonding: An Interim Discussion [Review]
ChemPhysChem 2013, vol. 14, pp. 278–294

Volker Hessel, Dana Kralisch, Norbert Kockmann, Timothy Noël, Qi Wang
Novel Process Windows for Enabling, Accelerating, and Uplifting Flow Chemistry [Review]
ChemSusChem 2013, vol. 6, pp. 746–789

Helena J. Shepherd, Gábor Molnár, William Nicolazzi, Lionel Salmon, Azzedine Bousseksou
Spin Crossover at the Nanometre Scale [Microreview]
Eur. J. Inorg. Chem. 2013, pp. 653–661

Junichiro Yamaguchi, Kei Muto, Kenichiro Itami
Recent Progress in Nickel-Catalyzed Biaryl Coupling [Microreview]
Eur. J. Org. Chem. 2013, pp. 19–30

David Schweinfurth, Naina Deibel, Fritz Weisser, Biprajit Sarkar
Mit Klick zu neuen Liganden [Magazin]
Nachr. Chem. 2011, vol. 59, pp. 937–941
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