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Updated: Feb 11, 2026
Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
Published on: September 19, 2017
Control of the Spin Dynamics of Single-Molecule Magnets by using a Quasi One-Dimensional Arrangement
Keiichi Katoh1, Satoshi Yamashita2, Nobuhiro Yasuda3
1Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.
Abstract:
Magnetic dipole interactions are dominate in quasi one-dimensional (1D) molecular magnetic materials, in which TbNcPc units (Tb3+ =terbium(III) ion, Nc2- =naphthalocyaninato, Pc2- =phthalocyaninato) adopt a structure similar to TbPc2 single-molecule magnets (SMMs). The magnetic properties of the [TbNcPc]0/+ (neutral 1 and cationic 2) with 1D structures are significantly different from those of a magnetically diluted sample (3). In particular, the magnetic relaxation time (τ) of 2 in the low-temperature region is five orders of magnitude slower than that of 3. Furthermore, the coercivity (HC ) of 2 remained up to about 20 K. The single-ion anisotropy of Tb3+ ions in a 1D structure and the magnetic dipole interactions acting among molecules determines the direction of the magnetic properties. These results show that the spin dynamics can be improved by manipulating the arrangement of SMMs in the solid state.
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