Archive for the ‘Meet our authors’ Category

Meet our author… Barbara Zajc

Barbara Zajc is an organic chemist working at The City College and The City University of New York. Her research interests cover, among other things, the regioselective fluorination of bioactive molecules, the synthesis and study of fluorinated carcinogen analogues, polycyclic aromatic hydrocarbons and modified nucleosides.

Zajc’s recent communication, published in ChemComm, utilises ‘Click’ chemistry and Julia-
Kocienski olefination to synthesise vinyl and fluorovinyl triazoles: Facile synthesis of 4-vinyl- and 4-fluorovinyl-1,2,3-triazoles via bifunctional “click-olefination” reagents

Below, Barbara takes some time away from her research to talk to us…

What initially inspired you to become a scientist?

Anything related with nature and life has always interested me, and chemistry is one of the basic sciences for understanding how things work.  When I was an undergraduate at the University of Ljubljana (Slovenia), I became involved with research and I enjoyed it.  So when the opportunity arose to join a research group and pursue a Ph.D. , this became a natural choice.

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

One focus of our research is the development of methods for the regiospecific introduction of fluorine into organic molecules. We are exploring the synthesis and reactivity of specific fluorinated building blocks, leading to diverse fluorinated molecules via a modular assembly approach.  We are also interested in the role fluorine has on the reactivity of various reagents, compared to a hydrogen atom.  We have previously developed a series of novel Julia-Kocienski reagents for the synthesis of various functionalised vinyl fluorides.  In this particular work we were interested in developing “multifunctionalisable” Julia-Kocienski reagents that would allow quick and facile introduction of different substituents at N– and vinyl moieties, during assembly of the vinyl or fluorovinyl triazole scaffold.

Why did you choose ChemComm to publish your work?

For many years now, ChemComm has remained a prestigious journal, with broad readership and high-impact.  I am impressed with the Editorial department’s speed of review, the publication process, and the “error-free” reproduction of our submitted material.

Where do you see your research heading next?

We are planning on using this particular method we have developed for the synthesis of new classes of vinyl and fluorovinyl triazoles of potential biological importance.

What do enjoy doing in your spare time?

Hiking in nature, watching wildlife, occasionally visiting an art gallery, going to the opera or a classical music concert, reading a good novel and skiing when I find the time.

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

I was always fascinated with nature and in particular with the animal world.  If I was not a chemist, I would have loved to be an animal behaviour observer.

Other organic chemistry articles recently published in our sister journal Chemical Science that might interest you include:-

Catalytic asymmetric allylic alkylation employing heteroatom nucleophiles: a powerful method for C–X bond formation
Barry M. Trost, Ting Zhang and Joshua D. Sieber
Chem. Sci., 2010, 1, 427-440
DOI: 10.1039/C0SC00234H, Perspective

Continuous flow multi-step organic synthesis
Damien Webb and Timothy F. Jamison
Chem. Sci., 2010, 1, 675-680
DOI: 10.1039/C0SC00381F, Minireview

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Meet our author… Greg Qiao

Greg Qiao is a polymer scientist and engineer at the University of Melbourne in Australia. His research interests cover various polymerisation techniques, including controlled free radical polymerisations, in a bid to synthesise novel polymeric architectures, biodegradable and functional polymers.  

Qiao’s recent communication, published in ChemComm, touches upon his interest in using polymers as coatings for the automotive industry or as potential drug delivery vehicles: ‘Star Polymers Composed Entirely of Amino Acid Building Blocks: A Route towards Stereospecific, Biodegradable and Hierarchically Functionalized Stars 

Below, Greg takes some time away from his research to talk to us… 

What initially inspired you to become a scientist?
When I was a child, I always dreamed of becoming a scientist. I chose science and engineering as my major when starting university and fell in love with both chemistry and chemical engineering.  I’ve always believed that science and technology can change and improve life for the human society.

Greg Qiao

What was your motivation behind the work described in your ChemComm article?
My research group has spent over 10 years in the field of controlled synthesis and characterisation of core crosslinked star (CCS) polymers. We initially used controlled free radical polymerisation methods, including nitroxide–mediated polymerisation (NMP) and atom transfer radical polymerisation (ATRP) methods, to synthesise CCS polymers and study their properties including molecular morphology and solution rheology. We also studied CCS analogues for their suitability as additive to automotive paint.
 
Five years ago, we started to synthesise CCS polymers with alternative polymerisation methods including ring opening polymerisation (ROP) for selectively degradable CCS. More recently, we have been working on new ways to form CCS which is fully biodegradable and biocompatible.  In this work, we developed a new process by using peptide synthesis as a controlled chain growth method to produce CCS. This process not only uses entirely naturally occurred amino-acid precursors, but also provides more convenient approaches to functionalise CCS at its core, along the arms and at the end of the arms. We are hoping this work can lay foundation for the new peptide-based drug delivery vehicles.

 

Why did you choose ChemComm to publish your work?
Because of the fast and broad readership, as well as its high impact.
 
Where do you see your research heading next?
We wish to develop this unique peptide-based CCS as a drug carrier for delivering drugs to targeted cells. My other research direction is using the controlled polymerisation method to create an efficient and thickness-controlled surface coating technology. 
 
What do enjoy doing in your spare time?
Reading a good article that has a completely fresh, new idea.
 
If you could not be a scientist, but could be anything else, what would you be?
Politician or publican servant – something to serve the public.

Other polymer articles recently published  in ChemComm that might also interest you include:-

Emerging synthetic approaches for protein–polymer conjugations
Rebecca M. Broyer, Gregory N. Grover and Heather D. Maynard
Chem. Commun., 2011, 47, 2212-2226
DOI: 10.1039/C0CC04062B, Feature Article

 Functional, star polymeric molecular carriers, built from biodegradable microgel/nanogel cores
Jay A. Syrett, David M. Haddleton, Michael R. Whittaker, Thomas P. Davis and Cyrille Boyer
Chem. Commun., 2011, 47, 1449-1451
DOI: 10.1039/C0CC04532B, Communication

A synthetic approach to a fullerene-rich dendron and its linear polymer via ring-opening metathesis polymerization
Jonggi Kim, Myoung Hee Yun, Junghoon Lee, Jin Young Kim, Fred Wudl and Changduk Yang
Chem. Commun., 2011, Advance Article
DOI: 10.1039/C0CC05470D, Communication

Cationic and charge-neutral calcium tetrahydroborate complexes and their use in the controlled ring-opening polymerisation of rac-lactide
Michael G. Cushion and Philip Mountford
Chem. Commun., 2011, 47, 2276-2278
DOI: 10.1039/C0CC04348F, Communication
 

And also from our sister journal Chemical Science, a Perspective and an Edge Article for you to read:-

 Triggered structural and property changes in polymeric nanomaterials
Jason M. Spruell and Craig J. Hawker
Chem. Sci., 2011, 2, 18-26
 

Cylindrical micelles from the living crystallization-driven self-assembly of poly(lactide)-containing block copolymers
Nikos Petzetakis, Andrew P. Dove and Rachel K. O’Reilly
Chem. Sci., 2011, Advance Article
 
 

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Congratulations to Jean-François Nierengarten

Jean-François NierengartenWhat’s special about Gene delivery with polycationic fullerene hexakis-adducts?

Well, that’s the topic of Jean-François Nierengarten’s recent ChemComm communication, rated as ‘hot’ by the referees and free to access* until 15th March. It is also his 25th independent research article in ChemComm.

To celebrate this achievement, Professor Nierengarten has taken some time out from his research to speak to ChemComm about his career.

What inspired you to become a scientist?
As far as I remember, I was always fascinated by natural sciences and wildlife. I started to study biology at the University of Strasbourg (Université Louis Pasteur at that time) with the idea of becoming a zoologist to discover unknown animals in the Amazon rainforest or in other wild places in the world. On the way, I discovered chemistry thanks to a couple of outstanding teachers and definitively switched from biology to chemistry after I met Jean-Pierre Sauvage at the end of my first year of Master. Fortunately, after my Master, I had the chance to prepare my PhD under the guidance of Jean-Pierre, and thus to become a chemist.

What was your motivation behind the work described in your ChemComm article?
The work described in this paper is a part of our research program on the use of click chemistry for the post-functionalisation of fullerene hexa-adducts (Chem. Commun. 2008, 2450; 2010, 46, 3860 and 4160; 2011, 47, 1321). The initial driving force for this work was to apply the synthetic methodology developed in the group to the preparation of new molecules with specific properties. As very often happens, applications with our compounds rely on collaborations with colleagues having the appropriate expertise. Indeed, Jean-Serge Remy, a well-established scientist in the field of transfection and synthetic vectors, is a very good friend and discussing about science one Friday evening in a pub brought us to the idea of testing fullerene hexa-adducts as synthetic vectors. We thus prepared a series of hexa-substituted fullerene derivatives decorated with dendritic branches bearing peripheral ammonium groups. Jean-Serge and his co-workers could then show that polyplexes prepared from DNA and these globular polycationic fullerene derivatives exhibit remarkable gene delivery capabilities. This result was quite unexpected as a generally admitted rule for the design of gene delivery vectors is that compact globular polycations with an isotropic distribution of positive charges are not suitable candidates for such studies. The results reported in our ChemComm article show that this is indeed not the case.

Why did you choose ChemComm to publish your work?
For fast publication of our important findings, ChemComm is an obvious choice. Over the years, it has been always a pleasure to work with the RSC Journals in general and with ChemComm in particular. All the steps from the submission to the publication are very efficient and all is organized in a very professional way. Publishing our work in ChemComm is also the guarantee for high visibility. Finally, I am a supporter of European journals in general and strongly believe that the best of European chemistry should be reported in European journals. Having top quality journals in Europe is essential to give credit to the European chemical community.

Where do you see your research heading next?
In addition to their remarkable gene delivery capabilities, the fullerene hexa-adduct derivatives have also revealed a very low toxicity if any. The fullerene hexa-adduct core is therefore a particularly appealing 3D-scaffold for the development of new multifunctional bioactive molecules. Based on the versatile fullerene hexa-adduct building blocks already developed in our group (Chem. Commun. 2010, 46, 4160), the successive grafting of up to three different groups on the fullerene core can be efficiently achieved. We are currently working on a new generation of vectors bearing targeting subunits for specific gene delivery to selected cells and/or fluorescent probes to monitor their intracellular pathway by confocal microscopy.

What do enjoy doing in your spare time?
Spending time with Iwona, my wife, and our two kids, cooking, listening to music, travelling. I like also reading and playing the guitar but have less and less time for it!

What would you be if you weren’t a scientist?
Hopefully as happy as I am to be a scientist! I guess that it could be the case if I would be an ébéniste [cabinet maker]. During my childhood, I had a lot of fun making stuff from wood in the workshop of my godfather, a very talented ébéniste particularly gifted for marquetry. I could spend hours watching him applying pieces of veneer to form decorative patterns or pictures onto the commodes or the tables he was restoring.

Also of interest:
Less is more – multiscale modelling of self-assembling multivalency and its impact on DNA binding and gene delivery
Paola Posocco, Sabrina Pricl, Simon Jones, Anna Barnard and David K. Smith
Chem. Sci., 2010, 1, 393-404

*Access our free content any time, any place – register for an RSC Publishing personal account today

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Meet our author….Xin-Yan Wu

Xin-Yan Wu is an organic chemist based at East China University of Science and Technology, Shanghai, China. Her research focuses on the development of bifunctional organocatalysts, the subject of her recent ChemComm communication: Enantioselective intramolecular Rauhut–Currier reaction catalyzed by chiral phosphinothiourea

Find out more by downloading the communication – it is free to download until 14th February 2011.

Xin-Yan Wu has been talking to ChemComm about her work.

What inspired you to become a scientist?
I was fascinated with chemistry during high school and being a chemist became my dream. Therefore I chose chemistry as my major at university. During my undergraduate study I was greatly enchanted by the creativity and diversity of organic chemistry thus I chose to further pursue a doctorate in this field. After being awarded my PhD title, I joined Professor Qi-Lin Zhou’s research group (East China University of Science and Technology) and began to work in the field of asymmetric catalysis. My patient and silent nature was the catalyst for promoting me as a scientist.

What was the motivation behind the work described in your ChemComm article?
The development of new bifunctional organocatalysts became my research interest when I started to independently progress my research work. Although amino acid-derived aminophosphine compounds are useful intermediates for chiral ligands, they had never been used in asymmetric organocatalysis. In recent years we have developed phosphinothiourea derivatives as efficient catalysts. Initially, we focused on the Morita-Baylis-Hillman reaction and the 1,3-diploar cycloaddition. During the preparation of ω-formyl-enones as substrates for intramolecular Morita-Baylis-Hillman reaction via Wittig reaction, bis(enones) were obtained as by-products. We consequently envisioned whether chiral phosphinothiourea could catalyse the enantioselective Rauhut-Currier reaction of bis(enones). To the best of our knowledge, this reaction has scarcely been studied and the use of chiral organophosphine as its catalyst has never been reported. Hence, we attempted the phosphinothiourea as the catalyst for promoting such reaction, and fortunately we have obtained satisfactory results. Indeed, there are sometimes unexpected but pleasant surprises in research.

Why did you choose ChemComm to publish your work?
Because ChemComm is one of the most highly regarded international journals in chemistry and it possesses a broad readership.

Where do you see your research heading next?
We are now working on the enantioselective cycloaddition reactions catalysed by the amino acid-derived aminophosphines reported in the present paper. Meanwhile, we are seeking for other novel bifunctional organophosphines as organocatalysts, efficiently fulfilling a wide spectrum of enantioselective reactions.

What do you enjoy doing in your spare time?
I like cooking for my husband and writing blogs for my daughter.

If you could not be a scientist but could be anything else what would you be?
I would like to be a writer or a doctor.

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Meet our author… Jason Camp

Based at Nottingham University in the UK, Jason Camp’s research group focuses on developing mild, sustainable and environmentally friendly synthetic methods for forming added-value compounds from simple starting materials. Specifically, the group are interested in multifaceted catalysis, which is the ability of one metal to catalyse multiple unique processes in a reaction sequence.  

Why not read Jason Camp’s latest ChemComm publication on ‘Gold-Catalysed Rearrangement of O-Vinyl Oximes for the Synthesis of Highly Substituted Pyrroles’? It will be free to access until the 14th February, 2011.

 
Jason took some time out from his research to answer some questions for us…       What initially inspired you to become a scientist?
I grew up in a family of construction workers and was therefore constantly building (and destroying) things, from Lego to Lincoln Logs to forts in the backyard.
This concept of building and creating things carried over into my studies at university and really crystallised during my undergraduate research projects at the University of Adelaide and the University of California, Davis. 

For me, the fascinating thing about being a synthetic chemist is the ability, on a frequent basis, to make something that no one else has ever made or develop a better way to make an important compound. It is the challenge of taking what is known in the literature and building upon it to create something that enticed me into becoming a scientist. 

Why did you choose ChemComm to publish your work?
ChemComm was selected due to its high impact factor, broad readership and rapid turnaround time.
 
What was your motivation behind the work described in you ChemComm article?
The driving philosophy behind this research is the idea that one metal can catalyse multiple steps in a synthetic sequence, multifaceted catalysis. This research seeks to get the most out of the catalytic system, whilst limiting the overall cost in terms of time, waste and expense.
 

Where do you see your research heading next?
The work discussed in this communication underpins one of our major research philosophies and we hope to expand the concepts into a multitude of new reaction manifolds. We are therefore actively pursuing reactions that lend themselves to this sort of multifaceted catalysis process.

 

What do you enjoy doing in your spare time?
Spending time with my family and friends, hiking/biking and travelling the world.
 
If you could not be a scientist, but could be anything else, what would you be?
Travel writer / photographer

If you would like to find out more about Jason and his research, then please visit the Camp Research Group website for further information.

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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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Meet our Author… Ross Denton

Based at Nottingham University in the UK, Ross Denton’s research group works on the development of new reactions for the selective formation of carbon-heteroatom and carbon-carbon bonds catalysed by small organic molecules such as phosphine oxides and on the synthesis natural products.
 
Why not read Ross Denton’s latest ChemComm publication on ‘Phosphine oxide-catalysed chlorination reactions of alcohols under Appel conditions’  and let us know your thoughts in the blog below.
 

Ross Denton

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

What inspired you to become a scientist? 

I was interested in science and how things worked from an early age. I spent a lot of time taking things apart when I was young. During my chemistry degree I spent a year working at AstraZeneca where I read books on natural product synthesis in the library; I also began to read chemistry journals and was amazed at the complexity of the structures that were being made by organic chemists and at the creativity that is possible in synthesis. I knew then that I wanted to do a PhD in organic chemistry and work in this field. Later on, after completing my PhD, I was fortunate enough to work for K.C. Nicolaou – the author (along with Eric Sorensen) of one of the books about synthesis I had read as an undergraduate. I became a scientist because I wanted a job where I could pursue my own ideas to solve problems and hopefully develop something useful. 

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

Phosphorus reagents are used in synthetic chemistry labs around the world on a daily basis. Indeed, most organic chemists are familiar with the Wittig, Mitsunobu and Appel reactions. Despite being very useful these reactions all have one big drawback, namely, the generation of phosphine oxides as stoichiometric by-products. This means that the reactions cannot be easily used on a large scale and most of the time chromatography is necessary to separate the product from the phosphine oxide by-product. We want to solve the phosphine oxide problem by developing phosphine oxide-catalysed versions of these reactions – turning the by-product into the catalyst for the reactions. The work described in the paper is the first catalytic chlorination of alcohols under Appel conditions and is the proof-of-concept for a range of catalytic phosphorus reactions we are working on. Here triphenylphosphine oxide, the stoichiometric by-product formed in the classical version of the reaction, is used as a catalyst for the chlorination reaction. The result is a mild chlorination reaction and 90 % less triphenylphosphine oxide to remove from the product at the end. 

Why did you choose ChemComm to publish your work? 

Due to its fast publication times, broad readership and high impact factor. 

Where do you see your research heading next? 

We are now building on the results in the paper to develop other catalytic halogenation reactions and are also working on catalytic versions of several more of the most important phosphorus-mediated transformations such as the Wittig and Mitsunobu reactions. We hope that ultimately our research will help to eliminate phosphorus waste resulting in cleaner chemical synthesis. 

What do you enjoy doing in your spare time? 

Spending time with my wife and son. 

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

A mountaineer or rock climber.

If you have had a recent ChemComm publication and are interested in featuring on the ‘meet our authors’ website, then please get in touch with us at the ChemComm editorial office.

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