Ube Industries, Inc.

Yoshihisa Kakuta

Takafumi Iwasa

Kazuaki Kakita

Shigeyoshi Nishino

Hidetaka Shima

Masashi Shirai

Shigeru Yao

Tomonori Kanougi

Toshio Furuya

Takashi Atoguchi

Shusaku Wada

The present invention relates to a binuclear ruthenium complex dye represented by the following general formula (1-1): wherein Rrepresents a linear or branched alkyl group having 2 to 18 carbon atoms; X represents a counter ion; and n represents a number of the counter ions needed to neutralize a charge of the complex; and in which proton(s) (H) of one or more carboxyl groups (&#x2014;COOH) may dissociate.

Binuclear ruthenium complex dye, ruthenium-osmium complex dye, photoelectric conversion element using any one of the complex dyes, and photochemical cell

The present invention relates to a binuclear ruthenium complex dye having a higher absorption coefficient and capable of absorbing light of longer wavelength for realizing a photoelectric conversion element and a photochemical cell which may convert solar light into electricity over a wide wavelength range and exhibit high photoelectric conversion efficiency; and a binuclear ruthenium complex dye for realizing a photoelectric conversion element and a photochemical cell which may have high durability.

Photoelectric conversion element comprising binuclear ruthenium complex dye having a substituted bipyridyl group, and photochemical cell

A novel binuclear metal complex according to the present invention is an asymmetric binuclear metal complex represented by the general formula: (L)M(BL)M(L)(X), wherein Mand M, which may be identical or different, represent a transition metal; Land L, which are different, represent a chelate ligand capable of polydentate coordination and two Ls may be different and two Ls may be different; BL represents a bridge ligand having at least two heteroatom-containing cyclic structures, the heteroatoms contained in the cyclic structures being ligand atoms coordinating to Mand M; X represents a counter ion; and n is the number of counter ions needed to neutralize the charge of the complex. And the binuclear metal complex is useful as a metal complex dye.

Binuclear metal complex, metal complex dye, photoelectric conversion element, and photochemical battery

A process for producing a zirconium oxide precursor comprising precipitating a zirconium oxide precursor from an alcoholic solution of a zirconium compound, and a process for producing zirconium oxide having infrared absorption peaks assigned to an S&mdash;O bond between 1010 cm and 1025 cm and between 1035 cm and 1050 cm , which comprises heat treating the zirconium oxide precursor prepared by the above process. The zirconium oxide precursor and the zirconium oxide obtained in the process are effective as a catalyst for removing or decomposing nitrogen oxides.

Zirconium oxide and zirconium oxide precursor and process for producing them

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Tokyo, Japan

Yoshihisa Kakuta