Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion
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- David C. Izuogu
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Takefumi Yoshida
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Haitao Zhang
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Goulven Cosquer
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Keiichi Katoh
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Shuhei Ogata
- Department of Chemistry and Biological Science College of Science and Engineering Aoyama-Gakuin University, Fuchinobe Chuo-ku, Sagamihara Kanagawa 252-5258 Japan
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- Miki Hasegawa
- Department of Chemistry and Biological Science College of Science and Engineering Aoyama-Gakuin University, Fuchinobe Chuo-ku, Sagamihara Kanagawa 252-5258 Japan
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- Hiroyuki Nojiri
- Institute for Materials Research Tohoku University Sendai Miyagi 980-8577 Japan
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- Marko Damjanović
- Physikalisches Institut and Institute of Nanotechnology Karlsruhe Institute of Technology Wolfgang-Gaede-Strasse 1 76131 Karlsruhe Germany
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- Wolfgang Wernsdorfer
- Physikalisches Institut and Institute of Nanotechnology Karlsruhe Institute of Technology Wolfgang-Gaede-Strasse 1 76131 Karlsruhe Germany
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- Tomoya Uruga
- Research & Utilization Division Japan Synchrotron Radiation Research Institute (JASRI/SPring-8) 1-1-1 Kouto Sayo Hyogo 679-5198 Japan
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- Toshiaki Ina
- Research & Utilization Division Japan Synchrotron Radiation Research Institute (JASRI/SPring-8) 1-1-1 Kouto Sayo Hyogo 679-5198 Japan
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- Brian K. Breedlove
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
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- Masahiro Yamashita
- Department of Chemistry, Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Sendai 980–8578 Japan
説明
<jats:title>Abstract</jats:title><jats:p>Incorporating palladium in the first coordination sphere of acetato‐bridged lanthanoid complexes, [Pd<jats:sub>2</jats:sub>Ln<jats:sub>2</jats:sub>(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>(AcO)<jats:sub>10</jats:sub>]<jats:bold>⋅</jats:bold>2 AcOH (Ln=Gd (<jats:bold>1</jats:bold>), Y (<jats:bold>2</jats:bold>), Gd<jats:sub>0.4</jats:sub>Y<jats:sub>1.6</jats:sub> (<jats:bold>3</jats:bold>), Eu (<jats:bold>4</jats:bold>)), led to significant bonding interactions between the palladium and the lanthanoid ions, which were demonstrated by experimental and theoretical methods. We found that electron density was donated from the d<jats:sup>8</jats:sup> Pd<jats:sup>2+</jats:sup> ion to Gd<jats:sup>3+</jats:sup> ion in <jats:bold>1</jats:bold> and <jats:bold>3</jats:bold>, leading to the observed slow magnetic relaxation by using local orbital locator (LOL) and X‐ray absorption near‐edge structure (XANES) analysis. Field‐induced dual slow magnetic relaxation was observed for <jats:bold>1</jats:bold> up to 20 K. Complex <jats:bold>3</jats:bold> and frozen aqueous and acetonitrile solutions of <jats:bold>1</jats:bold> showed only one relaxation peak, which confirms the role of intermolecular dipolar interactions in slowing the magnetic relaxation of <jats:bold>1</jats:bold>. The slow magnetic relaxation occurred through a combination of Orbach and Direct processes with the highest pre‐exponential factor (<jats:italic>τ</jats:italic><jats:sub>o</jats:sub>=0.06 s) reported so far for a gadolinium complex exhibiting slow magnetic relaxation. The results revealed that transition metal–lanthanoid (TM–Ln) axial interactions indeed could lead to new physical properties by affecting both the electronic and magnetic states of the compounds.</jats:p>
収録刊行物
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- Chemistry – A European Journal
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Chemistry – A European Journal 24 (37), 9285-9294, 2018-06-07
Wiley
