Archive for the ‘Uncategorized’ Category

Sleeping sickness fly trap in a nutshell – GC article in Chemistry World

Written by Charlie Quigg

An international team of chemists has developed a green method for creating odour attractants to trap the insects that spread African sleeping sickness.

Sleeping sickness or African trypanosomiasis is transmitted by tsetse flies and is a threat to millions of people, and their livestock, across sub-Saharan Africa. Trapping these flies can reduce the number of sleeping sickness cases. Unfortunately, the odour attractants that draw the flies in are often prohibitively expensive – barring buffalo urine, which has unfortunate hygienic and olfactory detractions – limiting their use…

Tsetse flies feed on the blood of vertebrate animals © Image Quest Marine/Alamy

Interested to know more?

Read the full article by Charlie Quigg here

Read the research article in GC:

Synthesis of tsetse fly attractants from a cashew nut shell extract by isomerising metathesis

S. Baader, P.E. Podsiadly, D.J. Cole Hamilton and L.J. Goossen

Green Chem., 2014, Advance Article
DOI: 10.1039/C4GC01269K

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Driving towards success with biomass-derived petrol – GC article in Chemistry World

Chinese scientists have overcome previous limitations to generate high octane number petrol from biomass-derived γ-valerolactone (GVL), an organic compound that is already often blended in small amounts with petrol or diesel. Using an ionic liquid catalyst, the conversion churned out a 2,2,4-trimethylpentane-rich substance with an octane number of 95.4, the highest reported for biomass derived fuel.

GA

Process for converting GVL into high octane number petrol

Petrol, the liquid many of us use to run our cars, is typically obtained from fossil fuels. But, with energy demands rocketing, producing a renewable and sustainable alternative has become a challenge for many researchers…

Interested to know more?

Read the full article by Anisha Ratan in Chemistry World here…

Read the article in GC:

Conversion of biomass derived valerolactone into high octane number gasoline with an ionic liquid
Jiayu Xin, Dongxia Yan, Olubunmi Ayodele, Zhan Zhang, Xingmei Lu and Suojiang Zhang
Green Chem., 2015, Advance Article
DOI: 10.1039/C4GC01792G

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Wool Keratin Solubility in Ionic Liquids

Wool waste from the manufacturing of textiles is a renewable source of the biopolymer, keratin. The cysteine building blocks of keratin give rise to hydrogen bonding and covalent disulfide bonds; thus, harsh conditions or toxic reagents are required for its processing in conventional solvents. Alternative media, such as ionic liquids (ILs) and deep eutectic solvents, have been investigated for the processing of cellulose and lignin. Polypeptide-based keratin from Merino wool, on the other hand, may be used to produce protein fiber, but is less widely studied. In this paper, ILs and deep eutectic solvents were evaluated for their ability to dissolve wool keratin, and the regenerated material was characterized.

The researchers discovered that the wool did not appreciably dissolve in any of the deep eutectic solvents tested. In contrast, ILs were effective solvents and the solubility of wool was enhanced by adding 2-mercaptoethanol as a reducing agent. Characterization data revealed that the structure of the regenerated wool was altered from the raw material by a loss of crystallinity. Breakdown of the protein into smaller, water-soluble fragments also occurred, but this material could not be separated from the ILs.

Dissolution and regeneration of wool keratin in ionic liquids
Azila Idris, R. Vijayaraghavan, Usman Ali Rana, A.F. Patti, and D. R. MacFarlane
Green Chem. 2014, 16, 2857.
DOI: 10.1039/C4GC00213J

Jenna Flogeras obtained her B.Sc. and M.Sc. in Chemistry from the University of New Brunswick (Fredericton), Canada. Currently a Ph.D. student at Memorial University of Newfoundland, she is excited to spend some time outside the laboratory this summer to explore Thailand and Southeast Asia.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Green Chemistry issue 3 is now available to read online

Issue 3 of Green Chemistry is now available to read online.

Green Chemistry issue 3 outside front coverThe outside front cover this month (pictured left) features work by Javier Pérez-Ramírez and co-workers from Zurich, Switzerland. In their work they report how the Lewis-acid catalysed isomerisation of bio-oil derived glyocal over tin-based zeolites efficiently and sustainably produces glycolic acid and alykyl glycolates.

Read the full article:
A continuous process for glyoxal valorisation using tailored Lewis-acid zeolite catalysts
Pierre Y. Dapsens, Cecilia Mondelli, Bright T. Kusema, René Verel and Javier Pérez-Ramírez  
Green Chem., 2014, 16, 1176-1186, DOI: 10.1039/C3GC42353K


Green Chemistry issue 3 inside front coverThe inside front cover this month (pictured right) features work by Philip Jessop and co-workers from Ontario, Canada. In their work they focus on switchable-hydrophilicity solvents (SHS), which can switch reversibly between one form that is miscible with water and another that forms a biphasic mixture with water. They report new examples and compare them in terms of safety and environmental impact.

Read the full article:
Design and evaluation of switchable-hydrophilicity solvents
Jesse R. Vanderveen, Jeremy Durelle and Philip G. Jessop  
Green Chem., 2014, 16, 1187-1197, DOI: 10.1039/C3GC42164C

Both of these articles are free to access for 6 weeks!

Keep up-to-date with the latest content in Green Chemistry by registering for our free table of contents alerts.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT papers in Green Chemistry

Here are the latest HOT papers published in Green Chemistry as recommended by the referees:

Installation of protected ammonia equivalents onto aromatic & heteroaromatic rings in water enabled by micellar catalysis
Nicholas A. Isley, Sebastian Dobarco and Bruce H. Lipshutz  
Green Chem., 2014, Advance Article, DOI: 10.1039/C3GC42188K


Design and evaluation of switchable-hydrophilicity solvents
Jesse R. Vanderveen, Jeremy Durelle and Philip G. Jessop  
Green Chem., 2014, Advance Article, DOI: 10.1039/C3GC42164C

 


Cleaving C–H bonds with hyperthermal H2: facile chemistry to cross-link organic molecules under low chemical- and energy-loads
Tomas Trebicky, Patrick Crewdson, Maxim Paliy, Igor Bello, Heng-Yong Nie, Zhi Zheng, Xiaoli Fan, Jun Yang, Elizabeth R. Gillies, Changyu Tang, Hao Liu, K. W. Wong and W. M. Lau  
Green Chem., 2014, Advance Article, DOI: 10.1039/C3GC41460D

 


Sustainable polyesters for powder coating applications from recycled PET, isosorbide and succinic acid
C. Gioia, M. Vannini, P. Marchese, A. Minesso, R. Cavalieri, M. Colonna and A. Celli  
Green Chem., 2014, Advance Article, DOI: 10.1039/C3GC42122H

 

All the papers listed above are free to access for the next 4 weeks!

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Synthesis by sunlight

Sustainable oxidation reactions can be performed with inexpensive and readily available photovoltaic cells

Scientists in the US are calling upon the synthetic organic chemistry community to stop ignoring electrochemistry and have shown the two fields can work together to perform more sustainable reactions. And, to make the union even greener, it’s all powered by sunlight.

When a compound is oxidised, another one is reduced. In electrochemical oxidations, chemoselectivity is based solely on the oxidation potential of the functional groups in solution. Chemical oxidants, on the other hand, can be designed to select for a particular functional group based on criteria like steric effects or chirality. But the metal oxidant often required for chemical redox reactions ultimately results in reagent waste.

Now, Kevin Moeller and his team at Washington University in St Louis, have shown that electrochemistry can be used to conduct chemical oxidations that consume only sunlight and produce only hydrogen as a reduction product…


Read the full article in Chemistry World»

Read the original journal article in Green Chemistry:
Sunlight, electrochemistry, and sustainable oxidation reactions
Bichlien H. Nguyen, Alison Redden and Kevin D. Moeller  
Green Chem., 2013, Advance Article, DOI: 10.1039/C3GC41650J

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

3rd Industrial Green Chemistry World-Convention & Ecosystem (IGCW-2013)

 IGCW logo

The 3rd Industrial Green Chemistry World-Convention & Ecosystem (IGCW-2013), Asia’s largest Industrial gathering on green chemistry and engineering will be held on 6th, 7th and 8th December, 2013. It will bring together knowledge seekers and knowledge providers in the field of Green Chemistry and Engineering (GC&E) to advance the existing technologies and also to catalyze commercialization of environmentally benign as well as economical alternatives. It will mostly focus on the fields of Pharmaceuticals, Agro-chemicals, Dyes & Pigments, Specialty and Fine and Performance Chemicals.

1000+ global visitors that include senior decision makers from preeminent companies, 300 participators from leading Indian and International organizations, government bodies, academic institutions and 50 exhibitors will gather on the exhibition floor to seek emerging GC&E technologies, solutions and services.

Here you can network with the top Industry and Academia experts visiting IGCW-2013 as speakers and Presenters. It gives you an opportunity to utilize non-linear promotional benefits through IGCW Social media, website and IGCW Partners, connecting more than 50,000 Chemical Industry stakeholders world-wide. It gathers over 500 senior representatives from Management, R&D, Technologies, Operation & Production.

 

Exhibitor categories include:
- Green Processes & technology solution providers
- Green Solvents
- Green Catalysts
- Green Engineering
- Green chemicals, additives, etc
- Green Measurements & relevant service providers

IGCW-2013 Expo is one of the many aspects of the IGCW Convention. The 3rd IGCW-EXPO will bring together around 50 solutions and technology providers from all over the globe to partner with you in resolving your- immediate, short-term, mid-term or long term industrial green chemistry and engineering based requirements.

IGCW-2013 Date & Venue
6th, 7th & 8th December 2013
Renaissance Mumbai Convention Centre Hotel
Lakeside Chalet, Near Chinmayanand Ashram, Powai, Mumbai

For further information contact Ms. Krishna Padia at krishna.dave@newreka.co.in

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Sustainable Chemicals from Microalgae: Encompassing Biocrude through to Fine Chemicals

The Sustainable Chemicals from Microalgae one day conference will take place on the 19th November 2013 at the Chemistry Centre, Piccadilly, London. The conference will bring together researchers from academia and industry at all levels interested in developing microalgae in industrial biotechnology. This highly interdisciplinary symposium is co-sponsored by the BBSRC  (Biotechnology and Biological Sciences Research Council), a major funder of biotechnology-related research within the UK.

The programme of this meeting will feature both oral, flash poster and conventional poster presentations. Please follow the links to register to attend – registration fee £35: http://rsc.li/microalgae-2013

The list of speakers includes:

Professor Wim Brilman, Sustainable Process Technology, University of Twente, The Netherlands
Professor Mike Burkart, Department of Chemistry and Biochemistry, University of California, San Diego, USA
Professor Chris Dupont, Microbial and Environmental Genomics Group, J. Craig Venter Institute, San Diego, USA
Dr Juan Nogales Enrique, Centre de Investigaciones Biologicas (CSIC), Madrid, Spain
Professor Rene H Wijffels, Bioprocess Engineering, Wageningen University, The Netherlands
Mr Steve Skill, Plymouth Marine Laboratory, UK
Professor Alison Smith, Department of Plant Sciences, University of Cambridge, UK
Professor Rod Scott, Department of Biology and Biochemistry, University of Bath, UK
Professor John Love, College of Life and Environmental Sciences, University of Exeter, UK
Dr Michelle Stanley, The Scottish Association of Marine Science, UK
Dr Saul Purton, Institute of Structural and Molecular Biology, University College London, UK

For more details about this exciting conference and to register, please visit the website!

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Green Chemistry issue 10 is now available online

Issue 10 of Green Chemistry is now available to read online.

The front cover this month (pictured left) features work by Nicholas Gathergood and Stephen Connon and co-workers from the Czech Republic, Spain and Ireland. In their series of three back-to-back papers, they report how consideration of green chemistry metrics in tandem with performance studies can lead to prioritising safer ionic liquid solvents and imidazolium derived catalysts. Metrics determined include – antimicrobial toxicity, biodegradation, atom economy and length of catalyst synthesis. Performance of the imidazolium derived catalysts was greatly enhanced by incorporation of either esters or amides into the heterocyclic core, leading to low catalyst loadings. A Traffic Signal Light classification system was used to conveniently compare ionic liquid solvents and imidazolium derived catalysts metrics.

Read the three articles in full online:
Tandem ionic liquid antimicrobial toxicity and asymmetric catalysis study: carbonyl-ene reactions with trifluoropyruvate
Rohitkumar G. Gore, Thi-Kim-Thu Truong, Milan Pour, Lauren Myles, Stephen J. Connon and Nicholas Gathergood  
Green Chem., 2013, 15, 2727-2739, DOI: 10.1039/C3GC40875B

A new generation of aprotic yet Brønsted acidic imidazolium salts: low toxicity, high recyclability and greatly improved activity
Lauren Myles, Rohitkumar G. Gore, Nicholas Gathergood and Stephen J. Connon  
Green Chem., 2013, 15, 2740-2746, DOI: 10.1039/C3GC40975A

A new generation of aprotic yet Brønsted acidic imidazolium salts: effect of ester/amide groups in the C-2, C-4 and C-5 on antimicrobial toxicity and biodegradation
Rohitkumar G. Gore, Lauren Myles, Marcel Spulak, Ian Beadham, Teresa M. Garcia, Stephen J. Connon and Nicholas Gathergood  
Green Chem., 2013, 15, 2747-2760, DOI: 10.1039/C3GC40992A

Work by the team has also been featured in a recent Feature Article in Chemistry World. Click here to read the Feature Article in full.


 

The inside front cover this month (pictured right) features work by Jorge Beltramini and co-workers from Brisbane, Australia. In their work they utilize high resolution NMR to explain the depolymerisation mechanism of cellulose during acid treatment and milling.

Read the full article:
Mechanical depolymerisation of acidulated cellulose: understanding the solubility of high molecular weight oligomers
Abhijit Shrotri, Lynette Kay Lambert, Akshat Tanksale and Jorge Beltramini  
Green Chem., 2013, 15, 2761-2768, DOI: 10.1039/C3GC40945G

All of these articles are free to access for 6 weeks!

Keep up-to-date with the latest content in Green Chemistry by registering for our free table of contents alerts.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

HOT papers in Green Chemistry

Here are the latest HOT papers published in Green Chemistry, as recommended by the referees:       

THF co-solvent enhances hydrocarbon fuel precursor yields from lignocellulosic biomass
Charles Miao-Zi Cai, Taiying Zhang, Rajeev Kumar and Charles Wyman  
Green Chem., 2013, Accepted Manuscript, DOI: 10.1039/C3GC41214H   

C3GC41214H ga  


One-pot selective conversion of furfural into 1,5-pentanediol over a Pd-added Ir–ReOx/SiO2 bifunctional catalyst
Sibao Liu, Yasushi Amada, Masazumi Tamura, Yoshinao Nakagawa and Keiichi Tomishige  
Green Chem., 2013, Advance Article, DOI: 10.1039/C3GC41335G   

C3GC41335G ga   


Productive sugar isomerization with highly active Sn in dealuminated β zeolites
Jan Dijkmans, Dries Gabriëls, Michiel Dusselier, Filip de Clippel, Pieter Vanelderen, Kristof Houthoofd, Annelies Malfliet, Yiannis Pontikes and Bert F. Sels  
Green Chem., 2013, Advance Article, DOI: 10.1039/C3GC41239C   


C3GC41239C ga 
  


One-pot transformation of alkynes into alcohols and amines with formic acid
Jia Li, Chao Wang, Dong Xue, Yawen Wei and Jianliang Xiao  
Green Chem., 2013, Advance Article, DOI: 10.1039/C3GC41133H

   C3GC41133H ga     

All the papers listed above are free to access for the next 4 weeks!   

 

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)