Home > Press > Sponge-like 2D material with interesting electrical conductivity and magnetic properties: Researchers synthesize a new 2D Metal Organic Framework with an ever-growing list of possible applications
Chemical structure of iodine-doped Ni(II) tetraaza[14]annulene-linked MOF (NiTAA-MOF). While NiTAA-MOF is an insulator, the oxidized molecule acquires electrical conductivity and paramagnetism
CREDIT IBS |
Abstract:
Chemists at the Center for Multidimensional Carbon Materials (CMCM), within the Institute for Basic Science (IBS, South Korea), have reported the synthesis of a novel type of 2D metal organic framework (MOF) with interesting electrical conductivity and magnetic properties. Published in the Journal of the American Chemical Society, this new material may potentially contribute to optoelectronics, photovoltaics, (photo)electrocatalysis, and energy storage.
Sponge-like 2D material with interesting electrical conductivity and magnetic properties: Researchers synthesize a new 2D Metal Organic Framework with an ever-growing list of possible applications
Daejeon, Korea | Posted on October 31st, 2019
Also known as sponge-like or Swiss-cheese-like materials, MOFs are made of metal ions connected to organic ligands and are characterized by nano-sized holes. IBS researchers in collaboration with the School of Materials Science at the Ulsan National Institute of Science and Technology (UNIST) designed and synthesized Ni(II) tetraaza[14]annulene-linked MOF (NiTAA-MOF), where the metal component is nickel and the nickel tetraaza[14]annulene molecules are used as MOF building blocks for the first time.
The researchers discovered that doping this MOF with iodine changes its conductivity and magnetism. Pristine NiTAA-MOF conducts poorly. It is actually an insulator with an electrical conductivity smaller than 10-10 Siemens per centimeter. However, when it is chemically oxidized by iodine, the same measurement rises to 0.01 Siemens per centimeter (the larger this number, the better the conductor). This result shows the vital role of ligand oxidation in the electrical conductivity of some 2D MOFs, expanding the understanding of the origin of electrical conductivity in this type of MOFs.
In addition, the team checked how this material becomes magnetized in an applied magnetic field. Magnetization measurements performed by the researchers of the School of Materials Science showed that iodine-doped NiTAA-MOF is paramagnetic, that is it is weakly attracted by an external magnetic field, and becomes antiferromagnetic at very low temperatures. This means that it could become useful as a polarizing agent in dynamic nuclear polarization-nuclear magnetic resonance (DNP-NMR) that is used in experiments for material characterization.
The 2D MOF structure was also modeled through detailed calculations and analyzed by a variety of methods, such as X-ray diffraction, infrared, X-ray photoelectron, diffuse reflectance UV-vis, electron paramagnetic resonance, and Raman spectroscopies.
“Our work can contribute to the fundamental understanding of structure-property relationships in 2D electrically conductive MOFs, and may pave the way to develop new electrically conductive MOFs,” says Professor Ruoff, one of the corresponding authors of this study and UNIST professor. “Besides, the as-synthesized and iodine-doped NiTAA-MOF might be applicable in catalase mimics, catalysis, and energy storage.”
####
For more information, please click here
Contacts:
Dahee Carol Kim
82-428-788-133
@IBS_media
Copyright © Institute for Basic Science
If you have a comment, please Contact us.
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
News and information
Picosun expands selection of biocompatible ALD materials for medical applications November 4th, 2019
Disordered proteins become stable, ‘super-sticky’ materials: Improved protein control could lead to wound-healing gels and other applications November 3rd, 2019
Promising discovery could lead to a better, cheaper solar cell: Scientific instrument made at McGill reveals liquid-like properties of a solid substance November 1st, 2019
Shedding new light on the charging of lithium-ion batteries November 1st, 2019
Magnetism
Scientists tame Josephson vortices November 1st, 2019
Small magnets reveal big secrets: Work by international research team could have wide-ranging impact on information technology applications October 28th, 2019
Magnets sustainably separate mixtures of rare earth metals October 25th, 2019
Chemistry
Visible light and nanoparticle catalysts produce desirable bioactive molecules: Simple photochemical method takes advantage of quantum mechanics October 31st, 2019
Bio-inspired nano-catalyst guides chiral reactions October 25th, 2019
Possible Futures
Picosun expands selection of biocompatible ALD materials for medical applications November 4th, 2019
Disordered proteins become stable, ‘super-sticky’ materials: Improved protein control could lead to wound-healing gels and other applications November 3rd, 2019
Promising discovery could lead to a better, cheaper solar cell: Scientific instrument made at McGill reveals liquid-like properties of a solid substance November 1st, 2019
Shedding new light on the charging of lithium-ion batteries November 1st, 2019
Discoveries
Disordered proteins become stable, ‘super-sticky’ materials: Improved protein control could lead to wound-healing gels and other applications November 3rd, 2019
Electrifying science: New study describes conduction through proteins November 1st, 2019
Promising discovery could lead to a better, cheaper solar cell: Scientific instrument made at McGill reveals liquid-like properties of a solid substance November 1st, 2019
Shedding new light on the charging of lithium-ion batteries November 1st, 2019
Announcements
Disordered proteins become stable, ‘super-sticky’ materials: Improved protein control could lead to wound-healing gels and other applications November 3rd, 2019
Cage molecules act as molecular sieves for hydrogen isotope separation November 1st, 2019
New technique lets researchers map strain in next-gen solar cells November 1st, 2019
Electrifying science: New study describes conduction through proteins November 1st, 2019
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers
Disordered proteins become stable, ‘super-sticky’ materials: Improved protein control could lead to wound-healing gels and other applications November 3rd, 2019
Cage molecules act as molecular sieves for hydrogen isotope separation November 1st, 2019
New technique lets researchers map strain in next-gen solar cells November 1st, 2019
Shedding new light on the charging of lithium-ion batteries November 1st, 2019
Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage
Shedding new light on the charging of lithium-ion batteries November 1st, 2019
Do you Kyoto? World-leading companies share their approaches to environmentally friendly business at NAUM19 October 14th, 2019
New materials to help stop lithium-ion battery fires, explosions and improve battery performance October 2nd, 2019
Borophene on silver grows freely into an atomic skin: Rice scientists lead effort to improve manufacture of valuable 2D material October 1st, 2019