Navigation Links
Love triumphs over hate to make exotic new compound
Date:1/24/2013

y could be useful in new technologies for batteries, semiconductors and electronic memory devices.

Driven by curiosity, Barnes only began to look at the radical chemistry of the ring cyclobis (paraquat-p-phenylene) two years ago, nearly 25 years after the ring was first made.

"I wondered what would happen if we took it all the way to the max," said Barnes, the paper's first author and a member of Stoddart's group. "Can we take two of these rings, each with four positive charges, and make them live together?"

The rings repel each other like the positive poles of two magnets. Barnes saw an opportunity where he thought he could tweak the chemistry by using radicals to overcome the hate between the two rings.

"We made these rings communicate and love each other under certain conditions, and once they were mechanically interlocked, the bond could not be broken," Barnes said.

Barnes' first strategy -- adding electrons to temporarily reduce the charge and bring the two rings together -- worked the first time he tried it. He, Stoddart and their colleagues started with a full ring and a half ring that they then closed up around the first ring (using some simple chemistry), creating the mechanical bond.

When the compound is oxidized and electrons lost, the strong positive forces come roaring back -- "It's hate on all the time," Barnes said -- but then it is too late for the rings to be parted. "That's the beauty of this system," he added.

Most organic radicals possess short lifetimes, but this unusual radical compound is stable in air and water. The compound tucks the electrons away inside the structure so they can't react with anything in the environment. The tight mechanical bond endures despite the unfavorable electrostatic interactions.

The two interlocked rings house an immense amount of charge in a mere cubic nanometer of space. The compound, a homo[2]catenane, can adopt one of six oxidation state
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Unprecedented subatomic details of exotic ferroelectric nanomaterials
2. Exotic Automation & Supply Receives Ford’s 2011 World Excellence Award
3. Exotic particles, chilled and trapped, form giant matter wave
4. Tiny compound semiconductor transistor could challenge silicons dominance
5. NSF awards $450,000 to UNH, Conductive Compounds Inc. for solar panel innovation
6. Chemical makes blind mice see; compound holds promise for treating humans
7. Botanical compound could prove crucial to healing influenza
8. Scripps Research Institute scientists find easier way to make new drug compounds
9. Palatin Technologies Announces Halting of Phase I Clinical Trial of Obesity Compound in AstraZeneca Research Collaboration
10. Silence Therapeutics Partner, Quark Pharmaceuticals, Extends its Agreement With Pfizer to Develop one of Its Compounds Containing Silences AtuRNAi in a New Indication
11. Novel compound halts tumor spread, improves brain cancer treatment in animal studies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... Leatherwood Plastics has selected Vycom’s ... stay competitive in the semiconductor, clean room and ... impact product quality and productivity, according to Dwight ... in 1980 in Lewisville, TX, Leatherwood Plastics ... left the business. Much of Leatherwood’s equipment building ...
(Date:9/18/2014)... 2014 /PRNewswire/ - Oncothyreon Inc. (NASDAQ: ONTY ... but separate underwritten offerings of 10,000,000 shares of its ... $2.00 per share, for expected gross proceeds of $20 ... Preferred Stock at a price to the public of ... million. Each share of Series A Convertible Preferred Stock ...
(Date:9/18/2014)... (PRWEB) September 18, 2014 SeqLL ... Sequencing (tSMS™) technology, announced today the closing of ... investment, led by Genomic Diagnostic Technologies, will increase ... diagnostic applications. , Founded in March 2013 by ... Bioinformatics Analyst at Helicos BioSciences, SeqLL has continued ...
(Date:9/18/2014)... at USC have developed a new microscopy technology ... living animals at higher-than-ever resolution. , Dubbed "Complementation ... imaging resolutions that are an order of magnitude ... into the behavior of biomolecules at the nanometer ... 18 by Nature Communications , the researchers ...
Breaking Biology Technology:Leatherwood Plastics Selects Vycom’s Flametec PVC-C Material to Stay Competitive in Semiconductor and Lab Equipment Industries 2Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 2Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 3SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2Scientists pioneer microscopy technique that yields fresh data on muscular dystrophy 2
... ,Jia Hu of China - Source: Getty Images The ... every four years. They're held every year. Though this is ... year as the pervasive growth of the industry becomes part ... run every four years and last two weeks, the biotech ...
... and rock-star futurist, spoke at the Young Professionals of ... by his insights and had to borrow a pen ... some R-squared commentary: , ,Watts: When Jesus Christ died, ... laid down, there were 200,000 Christians. Guess Paul was ...
... who switch from traditional paper phone bills to SBC ... , ,Through the "Save a StampHelp Save a Life" campaign, ... SBC Services Inc. will contribute $1 dollar for every SBC ... to Nov. 15, 2004. , ,In 2004, an estimated 216,000 ...
Cached Biology Technology:The Olympics: A Biotech Perspective 2The Olympics: A Biotech Perspective 3Watts Up 2
(Date:9/18/2014)... research has found clownfish larvae can swim up to 400 ... able to cope with environmental change. , Clownfish spend their ... but as babies they must wander the open ocean, says ... Excellence for Coral Reef Studies (Coral CoE) at James Cook ... go, but now we,ve been given a rare glimpse into ...
(Date:9/17/2014)... scientists were instrumental in the creation of the Santa ... classify the fire threat potential of the powerful, hot, ... into an inferno. The index was introduced Sept. 17 ... and San Diego Gas and Electric. , The index ... that will be used to help fire agencies and ...
(Date:9/17/2014)... an EC-FP5 four-year project, delivering its first release in ... participations in several EC projects, as a part of ... (EU BON), to increase the general awareness of the ... general dissemination of the Fauna Europaea results, the ... novel e-Publishing tools to prepare data papers for all ...
Breaking Biology News(10 mins):Nemo's epic journey to find a new home 2UCLA scientists play key role in developing new Santa Ana Wildfire Threat Index 2Contributions on Fauna Europaea: Data papers as innovative model on expert involvement 2
... medical project aimed at improving the prevention, diagnosis and ... serious conditions is launched this week after several years ... living in the south Manchester area are being given ... nationwide later this year. , They are being sent ...
... Scientists have developed a successful strategy for interfering with ... primates exposed to the lethal disease. This is the ... nonhuman primates. The findings could serve as the basis ... for known, emerging, and genetically engineered pathogens. , ...
... significant advance for regenerative medicine, researchers at Rice University have ... bone marrow such that the cells themselves produce a growth ... The research, which appears online this week in the Proceedings ... because of the science ?researchers found they could coax bone ...
Cached Biology News:Multi-million pound UK Biobank underway 2Multi-million pound UK Biobank underway 3Gene-specific Ebola therapies protect non-human primates from lethal disease 2Findings advance use of adult stem cells for replacement bone 2
... (phospho Y1007) ( Abpromise for ... Antigen: Synthesized phosphopeptide derived from ... of tyrosine 1007 (K-E-Y P -Y-K). ... 3717 Swiss ...
... Perm Buffer III is ... fixation of PBMCs (or ... staining for intracellular kinases ... simultaneously. Applications: Intracellular ...
Cytofix/Cytoperm Kit 250 Tests...
The BD PhosFlow Fix Buffer I can be used for the simultaneous fixation and permeabilization of cells prior to intracellular staining. Applications: Intracellular Staining (Flow) Storage Temperature:...
Biology Products: