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Molecular Lego turns green
23 June 2008
An environmentally-friendly method for connecting together the molecular building blocks
Green Chemistry's Impact Factor continues to rise!
19 June 2008
The latest citation data released by ISI shows Green Chemistry's Impact Factor has risen again this year to 4.836.
Celebrating 10 years of publishing
03 June 2008
In 2008 Green Chemistry will be celebrating its tenth anniversary, and to mark this occasion we are planning a number of high profile activities throughout the year.
Contents list for Green Chemistry, issue 7, 2008
Front cover
Green Chem., 2008, 10, 721
DOI: 10.1039/b810178g
Contents and Chemical Technology
Green Chem., 2008, 10, 723
DOI: 10.1039/b810179p
Editorial
Supercritical fluids in green chemistry
Green Chem., 2008, 10, 730
DOI: 10.1039/b809498p
Walter Leitner and Martyn Poliakoff discuss the uses of supercritical fluids in green chemistry.
Critical Review
Sustainable polymer foaming using high pressure carbon dioxide: a review on fundamentals, processes and applications
Leon J. M. Jacobs, Maartje F. Kemmere and Jos T. F. Keurentjes,
Green Chem., 2008, 10, 731
DOI: 10.1039/b801895b
Carbon dioxide has proven to be a more sustainable alternative as a blowing agent for the production of polymeric foams. Experimental parameters, such as the temperature and pressure at which the polymer is saturated with CO2 and rate at which the pressure is released, controls the foam morphology
Communications
Enhanced debromination of brominated flame retardant plastics under microwave irradiation
Thallada Bhaskar, Asako Hosokawa, Akinori Muto, Yasunori Tsukahara, Tomohisa Yamauchi and Yuji Wada,
Green Chem., 2008, 10, 739
DOI: 10.1039/b807370h
A novel method for the debromination of high impact polystyrene with brominated flame retardant by microwave irradiation in the presence of triethylene glycol at 250 °C for 30 min was performed and achieved 85 wt% of debromination.
Streamlined process for the esterification and ketalization of shikimic acid en route to the key precursor for oseltamivir phosphate (Tamiflu
)
Robert Carr, Frank Ciccone, Richard Gabel, Martin Guinn, David Johnston, Jill Mastriona, Trevor Vandermeer and Michael Groaning,
Green Chem., 2008, 10, 743
DOI: 10.1039/b801582a
The chemistry described herein provides a novel means to eliminate the use of the noxious reagent thionyl chloride and streamlining of the process en route to Tamiflu. This was accomplished by employing an in situ water scavenger to force the esterification to completion.
Papers
Preparation of mesoporous polyoxometalate-tantalum pentoxide composite catalyst and its application for biodiesel production by esterification and transesterification
Leilei Xu, Yuanhong Wang, Xia Yang, Xiaodan Yu, Yihang Guo and James H. Clark,
Green Chem., 2008, 10, 746
DOI: 10.1039/b803220c
A novel POM-containing environmentally friendly mesoporous composite, prepared by a one-step sol–gel-hydrothermal route, exhibits significantly high activity, selectivity, and stability towards biodiesel production under mild conditions.
Cellulose triacetate oligomers exhibit high solubility in dense CO2
Lei Hong, Matthew Fisher, Robert Enick and Eric Beckman,
Green Chem., 2008, 10, 756
DOI: 10.1039/b800812d
Cellulose triacetate oligomers were identified as highly CO2-soluble compounds that can be used as building-blocks for designing novel environmentally benign CO2-soluble surfactants and copolymers, significantly enhancing the role of CO2 in green chemistry and engineering.
Phase equilibria in ternary mixtures of the ionic liquid bmim[BF4], (S)-naproxen and CO2 to determine optimum regions for green processing
Eliane Kühne, Sabrina Santarossa, Geert-Jan Witkamp and Cor J. Peters,
Green Chem., 2008, 10, 762
DOI: 10.1039/b801068d
Solid–liquid and liquid–vapour equilibria of the title system show that CO2 influences the conditions for precipitation of (S)-naproxen in bmim[BF4] as well as the location and extension of the homogenous liquid phase region.
Studies on the solvent-free and waste-free Knoevenagel condensation
Ronald Trotzki, Markus M. Hoffmann and Bernd Ondruschka,
Green Chem., 2008, 10, 767
DOI: 10.1039/b801661e
The mechanochemical reaction of malononitrile with various aldehydes was studied with the goal to achieve quantitative stoichiometric conversion of the reactants to their corresponding benzylidene-malononitriles in absence of any solvents and catalysts.
Millisecond autothermal steam reforming of cellulose for synthetic biofuels by reactive flash volatilization
Joshua L. Colby, Paul J. Dauenhauer and Lanny D. Schmidt,
Green Chem., 2008, 10, 773
DOI: 10.1039/b804691c
Integration of devolatilization, catalytic gas cleaning, and water-gas-shift of crystalline cellulose over a Rh-based heterogeneous catalyst permits conversion to synthesis gas for synthetic biofuels within a single, authothermal reactor at millisecond time-scales.
Mixture effects and predictability of combination effects of imidazolium based ionic liquids as well as imidazolium based ionic liquids and cadmium on terrestrial plants (Triticum aestivum) and limnic green algae (Scenedesmus vacuolatus)
Marianne Matzke, Stefan Stolte, Andrea Böschen and Juliane Filser,
Green Chem., 2008, 10, 784
DOI: 10.1039/b802350f
This study investigates the effects of three differently composed mixtures containing ionic liquids as well as ionic liquids and the heavy metal cadmium on limnic green algae and wheat.
Mild catalytic oxidation of secondary and tertiary amines to nitrones and N-oxides with H2O2 mediated by Pt(II) catalysts
Marco Colladon, Alessandro Scarso and Giorgio Strukul,
Green Chem., 2008, 10, 793
DOI: 10.1039/b805404e
Environmentally benign hydrogen peroxide oxidizes tertiary and secondary amines under mild conditions and with medium to excellent yields in the presence of bridging hydroxo complexes of Pt(II) as catalysts.
Catalytic dehydration of fructose into 5-hydroxymethylfurfural by ion-exchange resin in mixed-aqueous system by microwave heating
Xinhua Qi, Masaru Watanabe, Taku M. Aida, Richard Lee Smith and Jr.,
Green Chem., 2008, 10, 799
DOI: 10.1039/b801641k
Catalytic dehydration of fructose into 5-hydroxymethylfurfural was studied in acetone–water mixtures in the presence of a cation exchange resin catalyst.
Catalytic activity of laccases in aqueous solutions of ionic liquids
Stepan Shipovskov, H. Q. Nimal Gunaratne, Kenneth R. Seddon and Gill Stephens,
Green Chem., 2008, 10, 806
DOI: 10.1039/b716369j
Laccase activity increases up to two-fold in mixtures of [bmim]Br or [bmim][N(CN)2] with water.
Back cover
Green Chem., 2008, 10, 811
DOI: 10.1039/b810180a
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