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Laboratory of Coordination chemistry,
Department of Chemistry,
Faculty of Science,
Toho University

Miyama2-2-1, Funabashi,
Chiba, 274-8510 Japan

Summary

There are the group of Prof. Takafumi Kitazawa and the group of Dr. Chihiro Kachi in the laboratory of coordination chemistry. The two groups have focused on interesting physical (magnetic and optical) properties of coordination polymer compounds such as spin crossover and molecule-based magnet. Prof. Yamagishi (visiting professor) has joined the laboratory of coordination chemistry since 2010.

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The group of Prof. Takafumi Kitazawa

The group of Prof. Takafumi Kitazawa has been investigating on the designs and synthesis of new spin crossover compounds. Spin crossover (SCO) behavior have attracted much attention in the field of molecular science, because of their potential applications such as molecular display, memory and switching devices. We have developed spin crossover systems based on the various Hofmann-like cyano-bridged coordination polymers using simple synthetic routes. We have reported various and systematic tuning spin crossover behavior by the substitution of the ligand and the selection of metal ions.
Other area of interests includes "Mineralomimetic Chemistry" using of cadmium cyanide and polycyano polycadmate systems. We have studied the synthesis and characterization of various cadmium cyanide clathrates.

The group of Dr. Chihiro Kachi-Terajima

The group of Dr. Chihiro Kachi has been investigating on magnetic properties (slow relaxation of magnetization) of molecule-based magnets. Our research interests are in the area of molecule-based magnets. In particular, our group is interested in the design and development of a new magnetic material exhibiting a slow relaxation of magnetization, such as single-molecule magnets, single-chain magnets, and glassy behavior of multi-dimensional compounds. The slow relaxation of magnetization is originated from the meta-stable magnetic state. Currently we are trying to develop the meta-stable magnetic state by using the metal complexes in which the orthogonal magnetic anisotropy and the ferromagnetic interaction compete. Of interest also are the magnetic properties chiral magnets of transition metal complexes and the photophysical properties (luminescence properties) of lanthanide complexes.

The group of Dr. Akihiko Yamagishi

The group of Dr. Akihiko Yamagishi has been investigating the stereochemical properties of chiral multi-nuclear metal complexes. The dimers, trimers and tetramers of ruthenium(III) diketonate complexes are prepared in the pure enantiomeric form. Their circular dichroism, vibrational dichroism and electrochemical properties are studied. Some of them are used as a dopant inducing the chiral nematic phases in liquid crystals. Our future attention will be to study the chiral effects on magnetic properties, in particular, on the intramolecular magnetic interaction among paramagnetic Ru(III) ions (e.g. ferromagnetic or antiferromagnetic?).

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