A process for preparing a compound of formula

##STR00001##

including oxidizing the triphenylmethane sulfone of formula (V) with a quinone chosen from 1,4-benzoquinone, 1,2-benzoquinone, a di(C.sub.1-C.sub.4)alkyl-1,4-benzoquinone, a di(C.sub.1-C.sub.4)alkyl-1,2-benzoquinone, a mono(C.sub.1-C.sub.4)alkyl-1,4-benzoquinone and a mono(C.sub.1-C.sub.4)alkyl-1,2-benzoquinone. A crystalline form of patent blue, sodium salt, can be achieved.

A process for preparing a compound of formula

##STR00001##

including oxidizing the triphenylmethane sulfone of formula (V) with a quinone chosen from 1,4-benzoquinone, 1,2-benzoquinone, a di(C.sub.1-C.sub.4)alkyl-1,4-benzoquinone, a di(C.sub.1-C.sub.4)alkyl-1,2-benzoquinone, a mono(C.sub.1-C.sub.4)alkyl-1,4-benzoquinone and a mono(C.sub.1-C.sub.4)alkyl-1,2-benzoquinone. A crystalline form of patent blue, sodium salt, can be achieved.

A color filter including at least a transparent substrate and color layers disposed on the substrate. At least one of the color layers contains a compound which is represented by the following general formula (I): ##STR00001##
In general formula (I), “A” is a substituent group represented by the following general formula (IV): ##STR00002##

Disclosed is a color material dispersion liquid for a color filter, the dispersion liquid being capable of forming a high-luminance coating film with excellent light resistance; a color resin composition for a color filter, the composition being capable of forming a high-luminance coating film with excellent light resistance; a color material that has, while it can form a high-luminance coating film, excellent light resistance; a high-contrast, high-luminance color filter; a liquid crystal display device including the color filter; and a light-emitting display device including the color filter. The color material dispersion liquid for a color filter, includes: (A) a color material, (B) a dispersant and (C) a solvent, wherein the color material (A) contains a cerium lake color material of an acid dye.

A compound is represented by the following formula (1).

##STR00001##

In the compound represented by Formula (1), at least one of R.sub.1 to R.sub.24 is a group particularly high electron withdrawing property, such as a sulfonic acid group and a carboxylic acid group or a group having the next highest electron withdrawing property to the sulfonic acid group and the carboxylic acid group, such as a halogen atom.

A method for the production of a sol-gel based matrix resulting in a sol-gel based matrix with high stability and high porosity. The sol-gel based material may be used for the production of a composite or sensor suitable for monitoring analytes.

A method for the production of a sol-gel based matrix resulting in a sol-gel based matrix with high stability and high porosity. The sol-gel based material may be used for the production of a composite or sensor suitable for monitoring analytes.

Provided are a colored composition having excellent heat resistance, excellent solvent resistance, and an excellent voltage holding ratio; a cured film; a color filter; a method for manufacturing a color filter; a solid-state imaging element; an image display device; and a compound. The colored composition includes a colorant comprising a repeating unit having a triarylmethane structure containing a cation, and a counter anion, and a polymerizable compound.

Provided are a colored composition having excellent heat resistance, excellent solvent resistance, and an excellent voltage holding ratio; a cured film; a color filter; a method for manufacturing a color filter; a solid-state imaging element; an image display device; and a compound. The colored composition includes a colorant comprising a repeating unit having a triarylmethane structure containing a cation, and a counter anion, and a polymerizable compound.

The invention relates to a photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer, and a photoinitiator, containing a coinitiator and a dye having the formula F An, where F stands for a cationic dye and An″ stands for an anion, wherein the dye having the formula F An comprises a water absorption of =5%. The invention further relates to a holographic medium, in particular in the form of a film, containing a photopolymer formulation according to the invention, to the use of such a medium for recording holograms, and to a special dye that can be used in the photopolymer formulation according to the invention.