Patent number: 6824712
Abstract: A selectively light-absorptive material for a color display, comprising a tetrazaporphyrine derivative having the formula:
where R1, R2, R3, R4, R5, R6, R7 and R8 are independently selected from the group consisting of hydrogen; an unsubstituted phenyl group, an alkyl group; an alkoxy group; a nitro group; halogen atoms; a halide; a cyano group; an alkylamino group; an aminoalkyl group; and a phenyl group having a substitutent selected from an alkyl group, an alkoxy group, a nitro group, halogen atoms, a halide, an alkylamino group, an aminoalkyl group and a cyano group, or two neighboring substituents among R1, R2, R3, R4, R5, R6, R7 and R8 are fused and substituted with 1 to 3 aromatic cyclic compounds, and unsubstituted groups among R1, R2, R3, R4, R5, R6, R7 and R8 are independently selected from the group consisting of hydrogen, an alkyl group, an alkoxy group, an allyl group, halogen atoms, a halide, a cyano group and a nitro group.
Type:
Grant
Filed:
January 29, 2002
Date of Patent:
November 30, 2004
Assignee:
SKC Co. Ltd.
Inventors:
Seung-gak Yang, Jin-bum Park, Geun-taek Bae, Ho-chan Lee
Patent number: 5912341
Abstract: Porphyrazine compounds having moieties substituted at the eight peripheral .beta.-pyrrole positions are disclosed. The porphyrazine compounds have the general structural formula: ##STR1## wherein M is H.sub.2 or a metal capable of complexing with the pyrrole nitrogen atoms, and A, B, C, and D are independently selected from the group consisting of a thio moiety, an amino moiety, an oxo moiety, a phospho moiety, a seleno moiety, a telluro moiety and a noncoordinating moiety, like a hydrocarbon moiety, with the proviso that not all of A, B, C, and D are a thio moiety and that not all of A, B, C, and D are a hydrocarbon moiety. The porphyrazine compounds, depending on the identity of A, B, C, and D, are capable of complexing one to four metal ions to the periphery of the porphyrazine to form a multimetallic porphyrazine. Multimetallic porphyrazine compounds can be linked peripherally to form a linear, i.e., ribbon, polymer or a two-dimension, i.e., sheet polymer.
Type:
Grant
Filed:
September 12, 1997
Date of Patent:
June 15, 1999
Assignee:
Hoffman/Barrett, L.L.C.
Inventors:
Brian M. Hoffman, Anthony G.M. Barrett