Provided are a phthalocyanine pigment that is non-water soluble and has antibacterial or antiviral effect, and inks, printed matter, paints, coatings, plastics, fibers, films, cosmetics, and the like containing the pigment. A specific phthalocyanine pigment has antibacterial or antiviral effect, although the pigment is non-water soluble, and has significantly high performance in terms of heat resistance and light fastness, compared with a dye-based antibacterial colorant, because of being a pigment. Because of being a pigment, the phthalocyanine pigment also has antibacterial and antiviral effects in applications such as inks, printed matter, paints, coatings, plastics, fibers, films, and cosmetics, thus achieving the task described above.

A composite nanomaterial of ZnO impregnated by, e.g., a green copper phthalocyanine compound (CuPc) can be an efficient solar light photocatalyst for water remediation. The composite may include hollow shell microspheres and hollow nanospheres of CuPc-ZnO. CuPc may function as a templating and/or structure modifying agent, e.g., for forming hollow microspheres and/or nanospheres of ZnO particles. The composite can photocatalyze the degradation of organic pollutants such as crystal violet (CV) and 2,4-dichlorophenoxyacetic acid as well as microbes in water under solar light irradiation. The ZnOCuPc composite can be stable and recyclable under solar irradiation.

An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.

The present invention addresses the problem of providing: a pigment dispersion liquid with which an optical filter layer having the functions of both a color filter and a near-infrared cut filter can be formed by performing a development step once, and with which a thin filter achieved by using a single-layer configuration instead of a conventional two-layer configuration can be fabricated; and a colored resin composition containing the pigment dispersion liquid. The present invention provides a pigment dispersion liquid containing one or more organic color pigments selected from the group consisting of pigment red, pigment green, pigment blue, pigment yellow, and pigment violet, an infrared absorbing dye having a maximum absorption wavelength in a wavelength range of 750-2000 nm, and an oil-soluble organic solvent or an aqueous medium, and a colored resin composition containing the dispersion liquid.

An electro-polarizable compound has the following general formula: ##STR00001##
Core1 is an aromatic polycyclic conjugated molecule having two-dimensional flat form and self-assembling by pi-pi stacking in a column-like supramolecule, R1 is a dopant group connected to Core1; a number m of R1 groups is 1, 2, 3 or 4. R2 is a substituent comprising one or more ionic groups connected to Core1; a number p of ionic groups R2 is 0, 1, 2, 3 or 4. The fragment marked NLE has a nonlinear polarization effect. Core2 is an electro-conductive oligomer self-assembling by pi-pi stacking in a column-like supramolecule, a number n of such oligomers is 0, 2, or 4. R3 is a substituent comprising one or more ionic groups connected to Core2; a number s of the ionic groups R3 is 0, 1, 2, 3 or 4. R4 is a resistive substituent providing solubility of the compound in a solvent and electrically insulating the column-like supramolecules from each other. A number k of substituents R4 is 0, 1, 2, 3, 4, 5, 6, 7 or 8.

A light-absorbing, neutral density filter for an electronic device display. More specifically, a light-absorbing, neutral density filter applied as a shield, protective film, or protective coating layer for an electronic device display that blocks ultraviolet light, high energy visible light, and at least a portion of blue light. The neutral density filter comprises a polymer substrate and an absorbing agent.

Provided is an organic pigment composition for color filters, which can be used preferably for a color filter that allows to produce a liquid crystal display device which has excellent heat resistance, a brighter display screen, and accordingly higher brightness; a method for producing the same; and a color filter which includes the organic pigment composition for color filters. The color filter has higher heat resistance by using the organic pigment composition for color filters which includes a phthalocyanine pigment and a pigment derivative in which the ratio of a multi-substituted phthalimide alkyl group to the whole amount of the pigment derivative is limited.

Provided is an organic pigment composition for color filters, which can be used preferably for a color filter that allows to produce a liquid crystal display device which has excellent heat resistance, a brighter display screen, and accordingly higher brightness; a method for producing the same; and a color filter which includes the organic pigment composition for color filters. The color filter has higher heat resistance by using the organic pigment composition for color filters which includes a phthalocyanine pigment and a pigment derivative in which the ratio of a multi-substituted phthalimide alkyl group to the whole amount of the pigment derivative is limited.

An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42.

An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42.