Development of Multiradical Ligands and Multinuclear High-Spin Complexes toward Room-Temperature Molecular Magnets

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17841
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Functional solid state chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: OKAZAWA Atsushi 東京大学, 大学院総合文化研究科, 助教 (30568275)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 分子性磁性体 / 金属錯体 / 有機ラジカル / 交換相互作用 / 希土類イオン / 構造磁性相関 / マルチラジカルキレート

Outline of Final Research Achievements

Toward achieving room-temperature molecular magnets, we developed a novel multiradical and multichelating ligand, which has a chelating ability on multiple radical functional groups, and its polynuclear complexes.
(1) One-dimensional metal complexes were successfully obtained by complexing the radical ligand with copper(II) chloride and bromide. The complexes showed extremely strong metal-radical magnetic couplings (~1000 K) beyond a thermal energy of room temperature, which were clarified by means of magnetic measurements and quantum chemical calculations.
(2) Dinuclear lanthanide(III)-radical complexes were synthesized, where we demonstrated a coordination ability to lanthanide ions on the two radical moieties in the multiradical lingad.

Free Research Field

化学