Chemistry World blog (RSC)

Syndicate content
Updated: 1 day 5 hours ago

Meet our guest bloggers – Heather Cassell

7 August, 2014 - 12:09

I’m Heather Cassell (née Stubley). I did a BSc in biochemistry and genetics at the University of Leeds, then I moved to the University of York where I did an MRes in biomolecular sciences followed by a PhD investigating enzyme activity in non-aqueous solvents. I am currently finishing my first postdoc position working as a research fellow in molecular and cell biology at the University of Surrey. The project involves cloning proteins of interest and attaching them to polymers or other nanoparticles then assessing their toxicity and cellular location in liver related cell lines.

I decided to write a ‘life in the lab’ blog strand because I love working as a scientist, especially the time spent in the lab itself – despite the many challenges. It gives me a chance to share my enthusiasm for working as a researcher and all things science-related. I plan to give an early career scientist’s view of life in the lab, balancing work and childcare, procrastination and productivity, research and recreation.

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)  
Categories: Education

The discovery of Buckyballs

31 July, 2014 - 16:31

Guest post by Rowena Fletcher-Wood

Among the many accidental discoveries through the ages is an experiment designed to probe carbon molecules in space, which unearthed a new terrestrial molecule.

Harry Kroto with buckyballs
© Science Photo Library

It all happened in an 11-day whirl, between 1 September 1985, when Harry Kroto first arrived at Rice University, US, and 12 September, when he, along with Richard Smalley and Robert Curl, submitted a paper to Nature: C60 Buckminsterfullerene’. Eleven years later, in 1996, the three were awarded the Nobel prize for chemistry.


Indeed, a Nobel prize may have been some consolation to Smalley and Curl, who were initially reluctant to delay their research on silicon and germanium semiconductors to let Kroto play with carbon. Kroto was exploring a completely different area of research: cyanopolyynes, alternating C–N chains detected in interstellar space using radiotelescopes. Although the evidence for their existence was good, the origin of these compounds was still unknown. Kroto postulated that they may form in the vicinity of red giants, and wanted to use Smalley’s laser-generated supersonic cluster beam to recreate this high-heat atmosphere and uncover mechanisms for their formation.

After agreeing to let Kroto use the apparatus, the three scientists, helped by graduate students James Heath, Sean O’Brien and Yuan Liu, loaded a graphite disk onto the beamline in a helium chamber and vaporised it into a plasma at temperatures exceeding the surface temperatures of most stars. Under high pressure helium, the vapour cooled and condensed, forming new interatomic bonds and aligning into different-sized clusters, which were immediately pulse ionised and swept into a mass spectrometer for analysis.

First, the students found Kroto’s expected carbon snakes, but then they noticed a distinct peak at C = 60 and a smaller one at C = 70. The abundance of C60, and increasing yield under higher pressure conditions suggested a very stable, closed-shell macromolecule. Unlike Kekulé’s benzene ring, buckminsterfullerene was not identified through dreaming, but through the resourceful application of sticky tape and cardboard cut outs. The model was proposed: a truncated icosahedron, consisting of twenty hexagons and twelve pentagons, like a carbon football. The name, buckminsterfullerene, was inspired by the architect famous for his similar-looking geodesic domes.

Since then, enthusiastic exploration into other fullerene allotropes has revealed that we could have accidentally discovered buckyballs long ago using much lower-tech equipment: a burning candle produces buckyballs in its soot by vaporising wax molecules. Not only that, but buckyballs occur in geological formations on Earth and, since 2010, have been detected in cosmic dust clouds. The ball-like carbon molecule wasn’t even a new idea: between 1970 and 1973, three independent research groups led by Eiji Osawa of Toyohashi University of Technology, R W Henson of the Atomic Energy Research Establishment, and D A Bochvar of the USSR, predicted the existence of the C60 molecule and calculated its stability. However, their work was purely theoretical, and didn’t get the attention it deserved. Buckyballs were discovered, rather than made, so perhaps it’s not surprising that they were found by accident: more surprising is that that weren’t found before.

 

References:

The Chemical Heritage Foundation – Richard E. Smalley, Robert F. Curl, Jr., and Harold W. Kroto

Press release – The Nobel Prize in Chemistry 1996: Robert F. Curl Jr., Sir Harold Kroto, Richard E. Smalley

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)  
Categories: Education

Meet our guest bloggers – Rowena Fletcher-Wood

31 July, 2014 - 16:11

I am a keen science communicator, a doctoral researcher in materials chemistry at the University of Birmingham and a climbing instructor.

Most of all, I like telling stories.

When I climb, I learn to fall. When I do chemistry, I learn to look for the unexpected. I have to agree with Einstein: researchers don’t know what they’re doing, that’s what makes it research – we’re fumbling around in the dark waiting for accidents to happen, and hopefully yield good results. Some of the things we see and use every day were discovered purely by accident – some of the things I will be writing about here.

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)  
Categories: Education

Journal cover art that will brighten your day

24 July, 2014 - 16:22

Guest post from Tom Branson

After browsing the recent chemical literature, I have finally found enlightenment. I have quite simply been left in a trance after witnessing a recent cover from Chemical Society Reviews.

A colour explosion

There’s so much colour in this image I just don’t know where to begin. So let’s start by taking a look at that green globe. Surely a prophecy of a future world when green chemistry has finally paid off and this development also seems to have led to a plethora of plant life sprouting from the Earth. Holding that planet aloft are two pairs of caring hands. An adult gently holds a child’s tiny hands and together they embrace this new future. Peace and love and chemistry, what more could you ask for?

And what about that background? Wow, they didn’t hold back with the colour palette. With some journals still charging for colour figures I bet these guys always get their money’s worth.

So there are adult hands, clasping a child’s hands, supporting the world, sprouting a bouquet of flowers, in front of a mega-rainbow, oh it’s almost enough to make me quit science and run off to join a cult.

Seriously though, the cover is a wonderful attempt to highlight sustainability and forward thinking, something that is sadly all too often lacking in modern society. The author of the paper, Jinlong Gong of Tianjin University, China, tells me of his hope that ‘this cover can call up the attention of people to consider more about the future of our world’. Nicely said.

There are not really many clues in the image as to what the published science is about but the keen eyed among you may have spotted a few water droplets on the plant leaves. Was the printer simply too close to the water cooler at Chem. Soc. Rev. headquarters, or is this paper all about solar water splitting? Aha, the latter of course.

Photocatalysis

The cover art is for a review article about a really promising solution for solar energy; tantalum-based semiconductors. Visible light can be absorbed by these semiconductors and used in solar water splitting, converting solar energy into chemical energy. The team from China highlight that while this type of photocatalyst is still far away from use in practical applications, improvements in the efficiency and stability of these systems give hope to the tantalum-based community.

Those wanting to know more about this tantal(um)ising hope for the future can access the article over at Chem. Soc. Rev.

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)  
Categories: Education

Meet our guest bloggers – Tom Branson

24 July, 2014 - 16:00

I recently completed my PhD at The University of Leeds where I was investigating protein-carbohydrate interactions and protein assembly. I’m a synthetic biologist now working on biomolecular interactions, based in The Netherlands. I also blog about science communication issues and chemistry trivia over at Chemically Cultured.

Here at Chemistry World, I will be writing a regular blog series to highlight some of the best academic journal covers – the images that grace the front of those magazines we all paw through. Many of you might think that academic journals are a place where only serious facts and tables of data find their home, but, at the very start of many journals lies an artistic outburst.

These journal covers are a great place for researchers to highlight their work and at the same time, show off their artistic skills. Many covers have caught my eye over the years and they deserve to be promoted for the talent and, more than often, eccentricities that show in these designs. Imagination, creativity and communication are core principles in the world of science and all this comes to the fore on the front cover of our favourite periodicals.

 

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)  
Categories: Education

YMS winners

10 July, 2014 - 14:50

The Royal Society of Chemistry’s 3rd Younger Members Symposium (YMS2014) was held towards the end of June at the University of Birmingham. Kicking off the day was Lesley Yellowlees who gave an inspirational plenary lecture covering her research and career path, in one of her final acts as RSC president. ‘Aspire to be the president of the Royal Society of Chemistry – it’s the best job ever,’ she told the audience. She also shared lessons she had learned over the years including: develop your own style, grasp opportunities and find ways of dealing with difficult colleagues.

Jamie Gallagher, the University of Glasgow’s public engagement officer, energised everyone after lunch by talking about his work and why public engagement makes you a better academic. Public engagement doesn’t necessarily have to involve standing on a stage like Jamie does on a regular basis. He gave some fantastic advice on the many schemes and organisations to get involved with such as Cafe Scientifique and your local RSC section.

Both excellent talks but the real meat of the day was comprised of poster sessions and seminars where attendees shared and quizzed each other on their research. Chemistry World was delighted to sponsor its first ever poster prizes in the inorganic and materials category. And the winners were…

First prize went to Giulia Bignami from the University of St Andrews.

Giulia Bignami: ‘The research work described in my poster focuses on the synthesis, according to the assembly-disassembly-organisation-reassembly (ADOR) method, of 17O-enriched UTL-derived zeolitic frameworks and their subsequent characterisation through 17O and 29Si solid-state NMR, involving both 1D and 2D spectral techniques, in magnetic fields ranging from 9.4T to 20.0T. We showed how 17O and 29Si NMR-based structural investigation proves extremely helpful to gain insights into the synthetic process employed, thus shedding light on the way new and targeted zeolitic structures could be achieved.’

Second prize went to Gurpreet Singh from the University of Central Lancashire.

Gurpreet Singh: ‘The aim of the research is to find new ion exchange materials for use in the nuclear industry. The problem with some of the current ion-exchange materials is that they are not stable to the conditions found in the waste pools at nuclear sites. Zirconium phosphates have been proposed to be more stable and by doping other metals into the structure in place of zirconium it might be possible to create new materials which have increase selectivity for the cations of interest (strontium and caesium). The work presented shows that yttrium can be successfully introduced into the structure of alpha-zirconium phosphate and the ion-exchange experiments are on-going.’

Third prize went to Daniel Lester for a poster about work he did at the University of Sussex.

Daniel Lester: ‘In the field of VOC (volatile organic compound) degradation by photocatalysis, P25 (powdered TiO2 of 75% anatase 25% rutile composition) is often seen as a benchmark material. However, in the continuous flow reactors used in industry, a powdered catalyst is impractical to use. I therefore aimed to create several supports for TiO2, which not only improved the physical durability of the catalyst but also improved the photocatalytic efficiency. Glass wool acted as a wave guide, TiO2 nanofibres served as photoactive supports and zeolites provided an electron sink to decrease hole-pair recombination and to increase contact time between the active species (TiO2) and the target VOC.’

Congratulations to all of our poster winners and to the organisers for an enjoyable symposium.

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)  
Categories: Education

WebElements: the periodic table on the WWW [http://www.webelements.com/]

Copyright 1993-2011 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.