December 2011 – Green Chemistry Blog

Archive for December, 2011

Top ten most accessed articles in November

20 Dec 2011

This month sees the following articles in Green Chemistry that are in the top ten most accessed:-

Recent advances in ionic liquid catalysis
Qinghua Zhang, Shiguo Zhang and Youquan Deng
Green Chem., 2011, Advance Article, DOI: 10.1039/C1GC15334J

Continuous flow reactors: a perspective
Qinghua Zhang, Shiguo Zhang and Youquan Deng
Green Chem., 2011, 13, 2619-2637, DOI: 10.1039/C1GC15334J

Industrial biotechnology – the future of green chemistry?
Stefanie Wenda, Sabine Illner, Annett Mell and Udo Kragl
Green Chem., 2011, 13, 3007-3047, DOI: 10.1039/C1GC15579B

l-Proline catalysed multicomponent synthesis of 3-amino alkylated indoles via a Mannich-type reaction under solvent-free conditions
Atul Kumar, Maneesh Kumar Gupta and Mukesh Kumar
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC16297G

Environmentally benign synthesis of heterocyclic compounds by combined microwave-assisted heterogeneous catalytic approaches?
Arif Daştan, Aditya Kulkarni and Béla Török
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC15837F

A critical review on recent methods used for economically viable and eco-friendly development of microalgae as a potential feedstock for synthesis of biodiesel
Yogesh C. Sharma, Bhaskar Singh and John Korstad
Green Chem., 2011, 13, 2993-3006, DOI: 10.1039/C1GC15535K

Synthesis and properties of trialkyl(2,3-dihydroxypropyl)phosphonium salts, a new class of hydrophilic and hydrophobic glyceryl-functionalized ILs
Fabio Bellina, Cinzia Chiappe and Marco Lessi
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC16035D

A magnetic nanoparticle supported dual acidic ionic liquid: a ‘quasi-homogeneous’ catalyst for the one-pot synthesis of benzoxanthenes
Qiang Zhang, Hong Su, Jun Luo and Yunyang Wei
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC16031A

Aqueous and biphasic nitrile hydration catalyzed by a recyclable Ru(ii) complex under atmospheric conditions
Wei-Chih Lee and Brian J. Frost
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC15950J

Syntheses of cyclic carbonates with amidinium halide catalysts in reusable, reversible, room-temperature ionic liquids or acetonitrile
Tao Yu and Richard G. Weiss
Green Chem., 2012, Advance Article, DOI: 10.1039/C1GC16027C

Why not take a look at the articles today and blog your thoughts and comments below.

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Critical review: The photoreaction of TiO2 and Au/TiO2 single crystal and powder surfaces with organic adsorbates. Emphasis on hydrogen production from renewables

14 Dec 2011

In this critical review, Karen Connelly and Hicham Idriss from the University of Aberdeen, UK and SABIC T&I, Saudi Aradia, review the fundamental aspects behind the reactivity of TiO₂ surfaces.

The authors look at both rutile-TiO₂and a gold/TiO₂system and the various factors that affect their reactivity, before studying the photoreaction of ethanol in more detail. Here, they show that the gold/TiO₂system shows about two orders of magnitude high activity that rutile-TiO₂and discuss the mechanisms of hydrogen production. However, the authors highlight that further work is still needed in this field as only one third of the hydrogen is extracted from the ethanol. They highlight that the challenge will be in designing photocatalysts for hydrogen production that are capable of breaking carbon-carbon bonds under ambient conditions.

This article is free to access until the 11th January 2012! Click the link below to read more…

The photoreaction of TiO₂and Au/TiO₂single crystal and powder surfaces with organic adsorbates. Emphasis on hydrogen production from renewables, Karen A. Connelly and Hicham Idriss, Green Chem., 2012, DOI: 10.1039/C1GC15992E

You may also be interested in this article, also free until the 11th January 2012:

Sustainable hydrogen production by the application of ambient temperature photocatalysis, Michael Bowker, Green Chem., 2011, 13, 2235-2246

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A quantitative comparison between conventional and bio-derived solvents from citrus waste in esterification and amidation kinetic studies

08 Dec 2011

(R)-(+)-Limonene and its close derivative p-cymene has been shown to be viable yet sustainable alternative solvents for amidation and esterification reactions.

James Clark and colleagues from the University of York, UK report the use of bio-derived solvents from citrus waste and their application in some organic reactions. Approximately 15 million tons of citrus waste is generated annually, but it is usually disposed of or incorporated into animal feed. However, this waste material provides excellent opportunities to obtain useful and/or valuable chemicals. Here, limonene obtained directly from citrus wastes, and p-cymene which can be synthesised easily from waste biomass, have been shown to be viable alternatives to conventional solvents in esterification and amidation reactions.

This article is free to access until the 16th January 2012! Click the link below to find out more…

A quantitative comparison between conventional and bio-derived solvents from citrus waste in esterification and amidation kinetic studies, James H. Clark, Duncan J. Macquarrie and James Sherwood, Green Chem., 2012, DOI: 10.1039/C1GC16299C

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Green Chemistry issue 12 now online

05 Dec 2011

Green Chemistry issue 12 is now online!

The front cover of this issue features work by Sibudjing Kawi and W. Thitsartarn from the National University of Singapore. They report a stable and active CaO-CeO₂ catalyst, prepared by simple gel formation viaa co-precipitation method, which was applied to the transesterification of oil to biodiesel. The catalyst could be reused up to 18 times without significant loss of activity and showed only low amounts of leaching. Find out more by reading the full article ‘An active and stable CaO–CeO₂catalyst for transesterification of oil to biodiesel.’

The inside front cover highlights work from Jérôme Husson and co-workers from the Université de Franche-Comté. They report a new synthesis route to 4,4′,4′′-tricarboxy-2,2′:6′,2′′-terpyridine, a ligand that is a component of the “Black-dye” sensitizer for dye-sensitized solar cells. The route developed by Husson has a lower ecological impact with respect to atom economy, yield, solvent and chemicals used and wastes generated, compared to the previously reported method. Find out more by reading the full article ‘A more efficient synthesis of 4,4′,4′′-tricarboxy-2,2′:6′,2′′-terpyridine.’

These articles are free to access until 16th January 2012!

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Liquid hydrocarbon fuels from cellulosic feedstocks via thermal deoxygenation of levulinic acid and formic acid salt mixtures

01 Dec 2011

US scientists have developed a route to produce liquid hydrocarbon fuels in high yields from cellulosic feedstocks.

Conversion of cellulosic feedstocks into liquid hydrocarbon transportation fuels could have a large impact on supplying our future energy needs. However, at present two barriers hinder it’s commercial implementation; first, the high cost per unit product as the feedstock energy feed rate is much smaller than in the petroleum industry; and secondly, the high operating cost to convert cellulosic material into energy dense biofuels partly due to the high cost of removing oxygen from the biomass.

In this work, Clayton Wheeler and colleagues from the Bioproducts Research Institute at the University of Maine, USA have used formic acid as a hydrogen source in the thermal deoxygenation of levulinic acid, giving high yields of deoxygenated hydrocarbons. This methods has significant advantages, providing a high-yield, robust, low-pressure, non-catalytic route to hydrocarbon mixtures from biomass, which are similar to petroleum crude oils.

This article is free to access until the 6th January 2012! Click below to find out more…

Liquid hydrocarbon fuels from cellulosic feedstocks viathermal deoxygenation of levulinic acid and formic acid salt mixtures, Paige A. Case, Adriaan R. P. van Heiningen and M. Clayton Wheeler, Green Chem., 2012, DOI: 10.1039/C1GC15914C

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Green Chemistry Blog

Archive for December, 2011

Top ten most accessed articles in November

Top cited Green Chemistry articles from 2011

Critical review: The photoreaction of TiO2 and Au/TiO2 single crystal and powder surfaces with organic adsorbates. Emphasis on hydrogen production from renewables

A quantitative comparison between conventional and bio-derived solvents from citrus waste in esterification and amidation kinetic studies

Green Chemistry issue 12 now online

Liquid hydrocarbon fuels from cellulosic feedstocks via thermal deoxygenation of levulinic acid and formic acid salt mixtures

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