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10 HEALTH AND LABORATORY MAGAZINE

SCIENTISTS FINALLY SYNTHESIZED

CARBON BASED MAGNETIC MATERIAL

Researchers synthesized
and crystallized a
molecule that is

otherwise too unstable
to fully study in the
laboratory.

AFTER 70 YEARS CARBON-BASED

MAGNETIC MATERIAL SYNTHESIZED Researchers from Osaka American Chemical thick steel. Nanostructures tion by steric protection— “This is an electronic state

University and Osaka City Society, researchers from of graphene have edges bulking up the molecule— that can serve as an exper-
University synthesized and Osaka University and that exhibit magnetic and and did so in a way that imentally tractable model
crystallized a molecule that collaborating partners electronic properties that didn’t affect its underlying for zigzag-edged nanog-
is otherwise too unsta- have synthesized a crys- researchers would like to properties.” raphene.”
ble to fully study in the talline nanographene with exploit. However, graphene
laboratory, and is a model magnetic properties that nanosheets are difficult to The researchers’ triangu- These results have
of a revolutionary class of have been predicted the- prepare and it’s difficult lene derivative is stable important applications.
magnets. oretically since the 1950s, to study their zigzag edge at room temperature but Researchers can extend
but until now have been properties. Overcoming must be kept in an inert at- the long-sought synthetic
Since the first reported unconfirmed experimental- these challenges by using mosphere because it slow- procedure reported here
production in 2004, re- ly except at extremely low a simpler, yet advanced, ly degrades when exposed to increase the number of
searchers have been hard temperatures. model system known as tri- to oxygen. Nevertheless, carbon rings in the mole-
at work using graphene angulene is something the crystallization was possi- cule and perform chemical
and similar carbon-based Graphene is a single layer, researchers at Osaka Uni- ble—which enabled confir- syntheses of advanced
materials to revolutionize two-dimensional sheet of versity aimed to address. mation of its theoretically forms of nanographene. In
electronics, sports, and carbon rings arranged in predicted properties, such so doing, Osaka University
many other disciplines. a honeycomb lattice. Why “Triangulene has long elud- as localization of unpaired and Osaka City University
Now, researchers from does graphene excite re- ed synthesis in a crystalline electrons on the zigzag researchers may be able to
Japan have made a dis- searchers? Graphene has form because of its uncon- edges of the molecule. synthesize materials that
covery that will advance impressive properties—it trolled polymerization,” say “By measuring its optical are foundational for future
the long-elusive field of exhibits efficient, long-dis- both Shinobu Arikawa and and magnetic properties, advanced electronics and
nanographene magnets. tance charge transport Akihiro Shimizu, two key we confirmed that our magnets, and supplement
In a study recently pub- and has a much higher authors of the study. “We molecule is in the triplet the silicon that’s ubiquitous
lished in Journal of the strength than similarly prevented this polymeriza- ground state,” explains in modern electronics.
Ryo Shintani, senior author.

Structure and spin density distribution of triangulene. Credit: Shinobu
Spin density distribution of triangulene and space-filling model and crystal structure of Arikawa et al.
triangulene derivatives. Credit: Shinobu Arikawa et al.