Pyridine derivative and its complex

Details Pyridine derivative and its complex Pyridine derivative and its complex

2001-12-21

2002-08-20

Dentz, Bernard (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S257000, C136S252000, C136S256000, C136S263000

Reexamination Certificate

active

06437130

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pyridine derivative and its ruthenium or osmium complex.
2. Discussion of the Background
A dye sensitizing type solar battery which employs a compound having photoelectric exchanging function is described in U.S. Pat. No. 5,463,057. Bipyridine and a ruthenium complex of tetrabipyridine are disclosed as examples for compounds having photoelectric exchanging function.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel pyridine derivative and its complex.
This and other objects have been achieved according to the present invention, the first embodiment of which includes a pyridine compound represented by the following formula (I)
wherein each of R
1
, R
2
, R
3
, R
4
is independently —OR′, —COOR′, —CONR′, —CHO, —CH
2
OR′, —CN, an alkyl group whose carbon number ranges from 1 to 20 inclusive, or —COONR′
4
, wherein R′ is a hydrogen, or an alkyl group whose carbon number ranges from 1 to 4 inclusive.
Another embodiment of the present invention includes a complex of a pyridine compound represented by the following formula (II)
wherein each of X
1
, X
2
, X
3
, X
4
is independently —OR, —COOR′, —CONR′, —CHO, —CH
2
OR′, —CN, an alkyl group whose carbon number ranges from 1 to 20-inclusive, or —COONR′
4
, wherein R′ is a hydrogen, or an alkyl group whose carbon number ranges from 1 to 4 inclusive;
wherein Z is Cl, Br, CN, NCS, or NCO; and
wherein M is Ru or Os.


REFERENCES:
Sprintschnik et al, “Preparation and Photochemical Reactivity of Surfactant Ruthenium (II) Complexes In Monolayer Assemblies and at Water-Solid Interfaces1,2”, Journal of the American Chemical Society/99:15/Jul. 20, 1977.
Eggleston et al, “Structural Variations Induced by Changes in Oxidation State and Their Role in Electron Transfer. Crystal and Molecular Structures of cis-[Ru(bpy)2Cl2]-3.5H2O and cis-[Ru(bpy)2Cl2]Cl-2H2O” Inorganic Chemistry, vol. 24, No. 26, 1985.

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