Author Archive

Printing on bioactive paper

An enzyme printing process that prints the product of an enzyme-catalysed reaction, but not the enzyme molecule itself, has been designed by scientists in Australia to produce bioactive paper.

Taking their inspiration from traditional printing methods such as ink jet and thermal contact printing, Wei Shen and colleagues from Monash University, Australia, have used relief and planographic printing methods to print the product of a reaction catalysed by an enzyme, in this case horseradish peroxidise (HRP)…….

Fancy reading more? Then why not read the full story online in Chemistry World. You can also download the article, which has been published in ChemComm:-

Printing enzymatic reactions
Junfei Tian and Wei Shen, Chem. Commun., 2011
DOI: 10.1039/c0cc03369c

 

 

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Emerging Investigators issue now published online!

Finally, the wait is over – ChemComm issue 1 has arrived and it does not fail to disappoint! It is bursting at the seams, filled with some truly outstanding Feature Articles and Communications from emerging scientists from across the globe, all of whom are in the early stages of their independent careers.

So why not take a look at issue 1 today? It is available to view online and all the articles will be free to access until the end of 2011. If you would like to be considered for next year’s issue (2012) then please email the ChemComm Editorial Office expressing your interest.

We are also pleased to announce that this ‘Emerging Investigators issue’ has also been recognised as an official activity for celebrating the International Year of Chemistry (IYC) during 2011. Why not take a look at the IYC website and keep up-to-date on what else is happening throughout 2011 to celebrate the achievements of chemistry and its contributions to the well-being of humankind.

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Meet our author… Yanbin Huang

Based at Tsinghua University in China, Yanbin Huang’s group works at the interface between polymer science and pharmaceutical science, specifically on synthetic polymers as the active pharmaceutical ingredients (API), drug-polymer conjugates, and drug/polymer solid dispersions.

Why not read Yanbin Huang’s latest ChemComm publication on ‘Toward the synthesis of sequence-controlled vinyl copolymers’? It will be free to access until the 5th of January, 2011. 

Yanbin Huang

Yanbin took some time out from his research to answer a few questions for us…  

What initially inspired you to become a scientist? 

I wanted to become a professor since I learned there was such a profession, probably attracted by its freedom and intellectual excitement, but also because five other family members had been teachers. Later on in college, I found out that research was part of being a professor, and found that I enjoyed discovering and creating new things as well as teaching what i’d learned. 

What was your motivation behind the work described in your ChemComm article? 

Our paper is about a strategy to synthesise vinyl copolymers with monomer-level sequence control. I was trained as a polymer scientist at Tsinghua University and always found it tempting to unify the synthetic and biological macromolecules into one coherent polymer science, with the only difference between them being to what extent we can control the sequence of the chain structure. I started dreaming about sequence-controlled vinyl copolymers in 2000 when I was still a PhD student in Professor Peppas’ group at Purdue, and in the summer of 2009 I finally figured out the working strategy to do this. 

Why did you choose ChemComm to publish your work? 

For its large and diverse readership and great reputation in chemical science. 

Where do you see your research heading next? 

The detailed chemistry still needs improvement. For example, the yield of each synthesis cycle should be higher than 95% to make it practical for a long polymer chain.  I hope our results so far have shown that this mono-addition followed by transformation strategy works and more groups will start working on these problems (there are already several great groups, including Professors Sawamoto and Kamigaito in Japan, and Professor Lutz in Europe, who are working on sequence-control vinyl copolymer synthesis). Afterwards, we can study the vinyl copolymers similar to proteins, i.e., to design its sequence, synthesise it, and then investigate its physics and biological activities. 

What do enjoy doing in your spare time? 

Reading books, watching movies, taking long walks and having dinner with my family and friends. 

If you could not be a scientist, but could be anything else, what would you be? 

I actually had serious plans to become a movie director like Ingmar Bergman and Hsiao-Hsien Hou. 

 

So, ‘that’s a wrap’ from Yanbin Huang, but if you fancy reading more about his research and the communication he discusses (recently published in ChemComm), then download the article today, which is free to access until the New Year (5th January)!

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Wrapping pseudorotaxanes around fullerenes

Scientists in the US have shown that mono- and hexakis-adducts of C60 fullerenes with crown ether rings can be made and then used as recognition sites for dibenzylammonium cationic derivatives, forming [2]- and [7]pseudorotaxanes, in solution.

The team are now busy exploring whether this hydrogen bonded recognition motif can be used to anchor C60 onto nanoparticles and flat surfaces.

Fraser Stoddart and his dedicated team at Northwestern University used NMR spectroscopy to look at the solid-state superstructure in more detail.

 

Fancy reading more? Then why not download the communication today, published in ChemComm, it will be free to access until the end of December.

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New class of singlet carbenes

Cheap and readily available halo vinamidinium salts have been found to be valuable precursors for a new class of singlet carbenes flanked by enamines, say scientists in Germany.

Alois Fürstner and his colleagues from the Max-Planck-Institut für Kohlenforschung, believe that the resulting metal complexes (which are stable and rich in electrons) may have a promising future in homogeneous catalysis.

Fancy reading more? Then why not download the communication today, published in ChemComm it will be free to access until the 24th December.

 

 

 

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Rapid screening for enzyme activity

UK scientists have developed a fast and sensitive method for screening transaminase activity and enantioselectivity, using D- and L-amino acid oxidases, allowing new amine substrates to be rapidly identified.

Nicholas Turner and colleagues from the University of Manchester and Richard Lloyd from Chirotech Technology Ltd in Cambridge, use inexpensive and readily available reagents. Moreover the technique only requires a UV/Vis-plate reader to operate in 96-well microtitre plate format. The team plan to develop this assay further and hopefully use it for high-throughput screening of transaminase libraries.

Fancy reading more? Then why not download the communication today, which will be free to access until the end of December.

This article is also part of the ‘Enzymes and Proteins’ web themed issue, showcasing the highest quality papers in the field of chemical biology, specifically research that deals with enzymes and proteins. Why not take a look at this online collection and read some other relevant papers in this area.

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A testament to undergraduates & women in science

Great research can start anywhere including your own undergraduate laboratory, as recently demonstrated by scientists in the US. 

Whilst running a teaching laboratory at the Texas Woman’s University, Manal Rawashdeh-Omary had senior undergraduate students attempting to reproduce literature findings published 10 years previously by Rasika Dias (from the University of Texas at Arlington) her collaborator. The students were asked to recreate a trinuclear silver pyrazolate complex, where one group of students obtained the expected non-luminescent dry product, whilst the other attained an unexpected green-luminescent product. Rather than simply dismissing the green product as experimental error, Rawashdeh-Omary directed her research group to investigate the reason for this ‘mistake’.  

(From left to right): Samuel Kiplagat, Tiffany Vaughan, Manal Rawashdeh-Omary, Shylaja Dharanipathi & Jacqueline Washington

The group realised that the green-luminescent complex was actually reacting with benzene – a highly toxic chemical, known for its carcinogenic properties. By incorporating the complex into thin films, the sensor could detect minute amounts of benzene vapour (and other small organic vapours) with remarkable reversibility, selectivity, speed and sensitivity. This is an important development for environmental and health issues, as well as making advancements in fundamental chemical phenomena for donor-acceptor and acid-base chemistry.

It is refreshing to see high quality research coming from universities and departments actively supporting women in science. Texas Woman’s University is the largest university primarily for women in the USA, with over 90% of the undergraduate population being female. Omary explains that many of the staff and students are mothers, balancing their research and studies with family responsibilities. So it is inspiring to learn that top quality research can be produced from all levels of academia and this is a true testament to undergraduates, showing what hard work and dedication can achieve.

  

Fancy reading more about this on/off benzene sensor? Then why not download the article today, which has been published in ChemComm and will be free to access until the 24th December. 

Written by Edward Morgan 

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Major groove for anti-cancer drug

A platinum(II)-based major groove binder was identified as a potent human topoisomerase IIα poison, showing anti-proliferation activities in human cancer cells.

Chi-Ming Che and colleagues from the University of Hong Kong were able to stabilise the covalent TopoIIα–DNA cleavage complex and induce cancer cell death with its high potency – apparently it’s significantly higher than a clinically used TopoIIα poison.

Fancy reading more? Then why not download the article today and blog some comments below. The communication, published in ChemComm will be free to access until the 24th December.

 

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Fluoride-free Hiyama couplings

A new, highly effective β-diketiminatophosphane palladium catalyst can be used in fluoride-free Hiyama coupling reactions of unactivated aryl chlorides in water.

Myung-Jong Jin and colleagues from the Inha University, in Korea, have published their findings in ChemComm. Fancy finding out more about this catalyst and the reaction conditions required? Then download the article today, which is free to access until the 9th December and why not blog some comments below too!

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Decarboxylative cross-coupling with copper

This is the first time, say scientists in China, that copper-catalysed decarboxylative reactions have enabled cross-coupling of alkynyl carboxylic acids with aryl halides, under relatively mild reaction conditions.

Jingsong You, Ying Xue and colleagues from Sichuan University in China believe the process is not only simple and convenient in terms of the reaction conditions and purification, but also tolerant of a variety of functional groups. This is a practical route to give unsymmetric internal arylalkynes. The team have also shown that benzofurans can be smoothly prepared by a one-pot domino protocol on the basis of decarboxylative cross-coupling of 2-iodophenol.

The team have published their findings in ChemComm so why not download the article today, which will be free to access until the 9th December.

 

 

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