Next step in producing magnetic organic molecules

July 30, 2019

A team from the Ruhr Explores Solvation Cluster of Excellence at Ruhr-Universität Bochum has created new molecules with magnetic properties. In contrast to many earlier organic magnets, the molecules were stable in the presence of water and oxygen. Their magnetic properties were retained up to minus 110 degrees Celsius - which is relatively warm for these compounds. Together with colleagues from the Russian Academy of Sciences in Chernogolovka, the team led by Professor Wolfram Sander, Chair of Organic Chemistry II, describes the results in the journal "Angewandte Chemie" on 2 July 2019.

Organic magnets could offer many advantages over conventional metallic magnets: they would be lightweight, transparent, economical and could be flexible or even liquid. Their magnetic properties could be switched on and off using light. "However, organic magnetic molecules are often unstable," says Wolfram Sander. "They react easily with other molecules or lose their magnetic properties when exposed to light or heat."

Magnetism due to unpaired electrons

Magnetism occurs when electric charges move; the phenomenon can be found in matter of any kind, but with varying degrees of intensity. What are known as arylnitrenes have proven to be promising molecules for organic magnets. "They possess two unpaired electrons with a strong magnetic interaction and are relatively easy to produce," says Enrique Mendez-Vega, one of the authors of the publication.

The researchers hoped for even stronger magnetic properties by combining several nitrenes. In the current work, they combined three nitrenes to form a trinitrene, which thus contained six unpaired electrons. Their route of synthesis achieved high yields.

Although the trinitrene had six unpaired electrons - a property that usually makes molecules reactive - it remained stable instead of reacting with oxygen and hydrogen. The researchers had embedded it in a water matrix, which also prevented the reactive units of the molecule from joining together, which would have caused them to lose their magnetic properties.

Next goal: stable at room temperature

"The trinitrenes are promising candidates for the development of organic magnets as they are relatively easy to produce in larger quantities, are stable and strongly magnetic," says Wolfram Sander. "We are now working on making them stable under normal environmental conditions, such as at room temperature."

Ruhr-University Bochum

Related Science Articles from Brightsurf:

75 science societies urge the education department to base Title IX sexual harassment regulations on evidence and science
The American Educational Research Association (AERA) and the American Association for the Advancement of Science (AAAS) today led 75 scientific societies in submitting comments on the US Department of Education's proposed changes to Title IX regulations.

Science/Science Careers' survey ranks top biotech, biopharma, and pharma employers
The Science and Science Careers' 2018 annual Top Employers Survey polled employees in the biotechnology, biopharmaceutical, pharmaceutical, and related industries to determine the 20 best employers in these industries as well as their driving characteristics.

Science in the palm of your hand: How citizen science transforms passive learners
Citizen science projects can engage even children who previously were not interested in science.

Applied science may yield more translational research publications than basic science
While translational research can happen at any stage of the research process, a recent investigation of behavioral and social science research awards granted by the NIH between 2008 and 2014 revealed that applied science yielded a higher volume of translational research publications than basic science, according to a study published May 9, 2018 in the open-access journal PLOS ONE by Xueying Han from the Science and Technology Policy Institute, USA, and colleagues.

Prominent academics, including Salk's Thomas Albright, call for more science in forensic science
Six scientists who recently served on the National Commission on Forensic Science are calling on the scientific community at large to advocate for increased research and financial support of forensic science as well as the introduction of empirical testing requirements to ensure the validity of outcomes.

World Science Forum 2017 Jordan issues Science for Peace Declaration
On behalf of the coordinating organizations responsible for delivering the World Science Forum Jordan, the concluding Science for Peace Declaration issued at the Dead Sea represents a global call for action to science and society to build a future that promises greater equality, security and opportunity for all, and in which science plays an increasingly prominent role as an enabler of fair and sustainable development.

PETA science group promotes animal-free science at society of toxicology conference
The PETA International Science Consortium Ltd. is presenting two posters on animal-free methods for testing inhalation toxicity at the 56th annual Society of Toxicology (SOT) meeting March 12 to 16, 2017, in Baltimore, Maryland.

Citizen Science in the Digital Age: Rhetoric, Science and Public Engagement
James Wynn's timely investigation highlights scientific studies grounded in publicly gathered data and probes the rhetoric these studies employ.

Science/Science Careers' survey ranks top biotech, pharma, and biopharma employers
The Science and Science Careers' 2016 annual Top Employers Survey polled employees in the biotechnology, biopharmaceutical, pharmaceutical, and related industries to determine the 20 best employers in these industries as well as their driving characteristics.

Three natural science professors win TJ Park Science Fellowship
Professor Jung-Min Kee (Department of Chemistry, UNIST), Professor Kyudong Choi (Department of Mathematical Sciences, UNIST), and Professor Kwanpyo Kim (Department of Physics, UNIST) are the recipients of the Cheong-Am (TJ Park) Science Fellowship of the year 2016.

Read More: Science News and Science Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to