Japan As Represented by Director General of Agency of Industrial Science

Secretary of Agency of Industrial Science and Technology

Yuichiro Himeda

Hideki Sugihara

Kazuyuki Kasuga

Hironori Arakawa

Takuji Hirose

Nobuko Komatsuzaki

Zhen-He Wang

Ryuzi Katoh

Bruce Baldwin

A ruthenium (II) complex having a dipyridophenazine or tetrapyridophenazine ligand and being represented by the formula (1) or (2) shown in the specification. Upon absorption of light, the complex emits fluorescence for a longer life time in a protic solvent as compared with known analogous compounds.

Ruthenium complex having di or tetrapyridophenazine ligand useful for use as luminescent material

Disclosed is a novel compound having activity as an ionophore for ion transport, which is a monoester or monoamide of 1,3,5-trimethyl-1,3,5-cyclohexane tricarboxylic acid, i.e. Kemp's triacid or the stereoisomer thereof, the group R in the ester group --COOR or in the amide group --CONHR being an aralkyl group or aryloxyalkyl group having 7 to 20 carbon atoms. The monoester and monoamide derivatives can be synthesized from anhydride of Kemp's triacid by subjecting the anhydride to a ring-opening esterification or amidation reaction with an alcohol or amine. On the other hand, both of the stereoisomers can be obtained by the dehydrohalogenation reaction of 1,3,5-trimethyl-1,3,5-cyclohexane tricarboxylic acid anhydride acid halide with an alcohol or amine followed by the ring-opening hydrolysis reaction on the anhydride group.

Cyclohexane tricarboxylic acid derivative and method for the preparation

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Tsukuba, Japan

Yuichiro Himeda